Crewsaver MIRG ELITE TWIN CHAMBER LIFEJACKET User manual

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
Project No : 00164-0104
Date: November 2016
Issue No: 3
Page
of 31
1
Servicing Manual
ELITE 275 TWIN CHAMBER
SERVICE MANUAL
Survitec House, Lederle Lane, Gosport,
Hants. PO13 0FZ, England.
Tel: [phone] Fax: [phone]
email: crewsa[email protected]
Web: www.crewsaver.com
R29965
MIRG ELITE TWIN CHAMBER
LIFEJACKET

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
Project No : 00164-0104
Date: November 2016
Issue No: 3
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No.
Issue 3
Description
This is a complete revision of the Manual. The servicing
principles covered by earlier issues remain the same but
service personnel should read through this new Manual to
familiarise themselves with the updated information. In
particular please note that the Mk5i Automatic Capsule
(black) may be used in place of the Mk6 Automatic Capsule
(Green).
Reference to Venturi Vacuum System
added (sections 6.1.2, 8.1.2 and Parts List)
Back pressure testing of the operating head added
Date
November 2016
Service Bulletins and Amendments Register

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
Project No : 00164-0104
Date: November 2016
Issue No: 3
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Index
Section 1
1.1 Introduction
1.2 Product Description
1.3 Data Sheet
1.4 General Features
1.5 Donning Instructions
Section 2
2.1 Service Station Guidelines
2.2 General Servicing Requirements
2.3 General Care
2.4 Servicing Tools
2.5 Lifejacket Servicing Record Sheet
Section 3
3.1 Unpacking the Lifejacket
Section 4
4.1 Cleaning Lifejackets
Section 5
5.1 Inspection
Section 6
6.1 Testing
Section 7
7.1 Repairs
Section 8
8.1 Assembly
Section 9
9.1 Replacement parts
Scope
This manual covers the servicing of the MIRG Elite 275N Twin Chamber lifejacket without any current
derivatives.

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
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Date: November 2016
Issue No: 3
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1.1 Introduction
1.2 Product Description
1.1.1. This Service Manual will be published on the Crewsaver website ( ). Click on Industrial www.crewsaver.co.uk
Commercial Products on the left hand side of the screen then select Trade Area. Personnel who have been trained
in the servicing procedures for this lifejacket will be issued with a Username and Password to enable them to
access the download section. Each manual carries an Issue Number and records of issue are logged by Crewsaver
to ensure that the service network maintains correct and up to date servicing information. Emails will be sent
regarding any new Issues. Periodically service bulletins may be issued which will be published on the Crewsaver
website ( ). Emails will also be sent. It is the service station's responsibility to regularly check www.crewsaver.co.uk
the website for any new bulletins and to ensure inclusion within the servicing manual. The service bulletin register
at the front of the Manual should be completed.
1.1.2. The information referenced in each section follows a standard servicing procedure by which the inspection should
take place.
1.1.3. This servicing manual details information to enable regular maintenance and servicing of the lifejacket to help
prolong the life of the product and ensure it functions correctly.
1.1.4. The manual should be used as a reference document following training in servicing procedures instructed by
Crewsaver approved personnel. The manual also details the equipment and parts needed for correct
maintenance to be performed.
1.1.5. Servicing must be carried out annually at a service station authorised by the manufacturer.
1.1.6. Regular servicing is to be carried out by qualified personnel trained by Crewsaver and holding a valid servicing
certificate. Certificates are valid for a period of 3 years.
1 yr
1.2.1. The MIRG Elite is a twin chamber 275N inflatable lifejacket.
1.2.2. The lifejacket is both SOLAS/MED approved and CE approved to EN 399 -275N Lifejackets.
1.2.3. The lifejacket is easy to don and work in whilst still retaining high in-water performance.
1.2.4. The buoyancy of the jacket is provided by two chambers with a 1.5 psi relief valve oral tube on each chamber to
ensure the full buoyancy is achieved whether on single or double chamber inflation. This feature enables the
jacket to continue to operate providing full buoyancy even in the eventuality that one of the firing heads fails.
1.2.5. The high buoyancy of this lifejacket allows it to be suitable when the user is wearing heavy clothing , an immersion
suit or carrying tools.
1.2.6. This lifejacket has a UM Mk6 green automatic firing head, with extra length lanyard, fitted to each chamber. These
are fired by automatic activators. In addition, the jacket is supplied with manual activators for use when the
lifejacket is worn in an aircraft or helicopter. These have extra length lanyards and tabs marked L and R.
1.2.7 This lifejacket is provided with a light that operates when the lifejacket inflates. The jacket is fitted with a crutch
strap and can be fitted with a spray hood that conforms to EN394.
1.2.8. This lifejacket comes in a waist belt version which has a zip and velcro cover closure. The outer cover is made from
aluminised fireproof material. The Training version of the jacket has a heavy duty red Cordura cover.
1
Section

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
Project No : 00164-0104
Date: November 2016
Issue No: 3
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1.3 Data Sheet
Features:
Front Chamber Buoyancy:
Rear Chamber Buoyancy:
Total Chamber Buoyancy:
Buoyancy category:
Cover Colour
MCA (UK) Approved
SOLAS Approved
CE Approved
Cylinder size
Standard Automatic
Hammar Automatic
Manual Firing head
Manual Override
Oral inflation tubes
Pressure relief valves
Heavy Duty cover
Whistle - fitted
Retro-reflective tape
Lifting Becket - fitted
Light - fitted
Spray Hood
Thigh straps
Fall Arrest Harness
Closure method
Alternative covers
MIRG Elite Twin 275N Lifejacket
275N
275N
275N
275N
Silver
X
X
X
60g
X
N/A
N/A
X
X
1.5 psi oral tube relief valves
X
X
X
X
Permanently fitted
Optional
Permanently fitted
N/A
Zip and velcro
Red (Training Jacket only)
-
1
Section

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
Project No : 00164-0104
Date: November 2016
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1
Section
1.4.1 General Features

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
Project No : 00164-0104
Date: November 2016
Issue No: 3
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1
Section
1.5.1 Donning Instructions
CREWFIT
JERK TO
INFLATE
JERK TO
INFLATE
FRO N T
D
PERSONS OF
32 KG
OR MORE
LR APPROVED
AUTHORISED
BY MCA
CREWFIT
JERK TO
INFLATE
JERK TO
INFLATE
FRONT
D
PERSONS OF
32 KG
OR MORE
LR APPROVED
AUTHORISED
BY MCA
Don the lifejacket like a normal jacket The backstrap should then be
positioned down the centre of
the back.
The lifejacket will
inflate automatically
upon immersion in
water. (Pull orange
manual operating
tabs down if manual
inflation is required).
Pull twin crutch
straps through legs
and fasten buckles.
Tension webbing to
fit.
Fasten the
interlocking front
buckle as shown.
Adjust the belt length
by pulling the
webbing through the
side buckle to achieve
a secure fit.
1 2
3
5
4
6

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
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2.1.1 Service stations shall comply with the following as a minimum;
2.1.1.1 Servicing of Inflatable Lifejackets shall be carried out in a fully enclosed area only.
2.1.1.2 The area shall be well lit and protected from direct sunlight
2.1.1.3 The temperature and humidity shall be sufficiently controlled to ensure that the servicing of inflatable
Lifejackets may be carried out successfully.
2.1.1.4 The area shall be efficiently ventilated but free from draught
2.1.1.5 Sufficient Tools (including specialist tools) shall be available to ensure Lifejackets may be disassembled,
tested and reassembled in accordance with this Manual. These shall include but not limited to:
2.1.1.5.1 Manometers and pressure gauges
2.1.1.5.2 Oil free and dry air supply
2.1.1.5.3 Scales for weighing Gas Cylinders
2.1.1.5.4 Crewsaver Service tool kit (See 2.6). This is recommended but similar calibrated devices may
also be used.
2.1.1.6 Stock of materials and components to allow efficient servicing with readily available replacement parts to
ensure a prompt service for the customer.
2.1.1.7 Only personnel trained and certified in accordance with Crewsaver requirements are approved to carry out
Servicing and Maintenance. They must be holders of a valid (3 years from date of issue) Certificate.
2.1.1.8 The service station shall be of an approved standard.
2.1.1.9 Procedures shall be introduced to ensure that service bulletins, Manuals and replacement parts are
obtained from Crewsaver.
2.1.1.10 Subsequent to initial approval and there after the service station shall be subject to regular surveillance by
Crewsaver.
2.1.1.11 The service station must comply and have met all QA criteria in the Crewsaver servicing protocol file.
2.2.1 On receipt of the Lifejacket(s), check the state of the packaging before opening and notify the owner and the
company delivering the package of any defects or damage.
2.2.2 On opening the package, check the contents for their general condition and quantity
2.2.3 Prepare Servicing Record Sheet
2.2.4 Visually inspect the cover and inflation for damage, abrasion, contamination etc. In accordance with this
manual
2.2.5 Note repairs or replacements required on the record sheet
2.2.6 Unless obvious damage is evident test the Lifejacket in accordance with Section 6. If it is considered that
the damage found would cause the Lifejacket to fail the tests then corrective action shall be carried out
prior to testing.
2.2.7 Damaged areas shall only be marked using wax based crayon; Marks shall be with a small circle or
cross. Ballpoint, rollerball or other forms of ink shall not be used. If in doubt refer to Crewsaver for
guidance.
2.2.8 Repairs to pouch are limited to that detailed in section 7.1
2.2.9 Repairs to welded components including the inflation chambers are expressly forbidden.
2.1 Service Stations
2.2 On Receipt Inspection
2
Section

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
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Date: November 2016
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2.3.1 This automatic jacket should be stowed in accordance with the manufacturers instructions
2.3.1.1 Lifejackets should be stowed in a dry compartment. Avoid high humidity, such as a car boot.
2.3.1.2 Automatic Lifejackets should have stowage facilities which are provided with a method to encourage
moisture removal.
2.3.1.3 Lifejackets should be stowed vertically, for example hung on hooks, in order that any trapped water
or condensation can drain away naturally.
2.3.1.4 Lifejackets should be rinsed in fresh water and dried thoroughly after use.
WARNING
Prior to sponging or washing remove automatic capsules from the firing mechanism. Allow to dry thoroughly
afterwards.
2.3.2 Contaminants such as oil or diesel fuel may be sponged off immediately with clean water and allow
to dry naturally.
2.3.3 Mud can be removed with a stiff (not wire) brush when dry.
2.3.4 The cover may be hand washed in good quality mild detergent in cool water (40oC) rinse well, drip dry naturally
in air.
2.3.5 Sponge the inflation chamber with pure soap solution only. Rinse in clean water immediately, inflate and allow
to dry naturally in air.
WARNING
Do not use proprietary cleaning fluids, thinners, spirits or simular substances.
2.3.6 In cases of severe contamination the unit shall be deemed beyond economic repair and the customer advised to
purchase a replacement lifejacket
WARNING
Make sure you know how to use and fit this lifejacket before an emergency occurs.
Always try and inflate the lifejacket in the water. If already inflated, cross arms over the chest before jumping.
2.3.7 It is advised that personnel are familiarised with the operation of all lifejackets and lifesaving appliances.
2.3 General Care
2
Section

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
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2.4 Lifejacket Servicing Tools
2.5 Lifejacket Service Record Sheet
2.5.1. An electronic copy of the sheet is available to aid reproduction (or copy next page).
2.5.2. Each lifejacket serviced should be recorded either individually or as a batch, showing the serial
numbers and the work performed during the service.
2.5.3. The service record sheet should be signed and a copy given to the owner certifying that the lifejacket
has been serviced.
2.5.4. All replacement parts should be noted - recording either the serial numbers of the component or the
expiry date.
2.5.5 The record sheet shown on the next page is a recommended version. Similar record sheets,
including the same information, may also be used.
2
Section
Fig. 2.4 Table of Tools Required
Crewsaver Servicing Tool Kit
A fine screw driver or tool suitable for removing gaskets
Boning tool
Roller
Brushes
Scissors good quality trimming shears
“Chinagraph” pencil
Tailors chalk
Fine point indelible pen
1 off metal calibrated metre stick
Scales to weigh gas cylinders 0-1000gram (+1/-1 grams)
Adaptor/tee piece for testing inflation chambers.
Manometer 0-500Mbar
Timing Device
Thermometer 0-40ºC
Clean and dry air supply
1 off ball pein hammer
450mm wide bag sealer (3mm element)
Crewsaver Venturi Vacuum System
Back pressure testing kit
Suitable large surface area for the work to be carried out
1 off FR steel cabinet (adhesive store)
1 off HD industrial sewing machine (e.g. Singer 96K, Juki, Durkopp etc.)
N.B. In case of difficulty contact Crewsaver direct (Not sewing machines, cabinets or tables - these parts may be sourced locally).
Note: Prior consent to carry out any repairs must be pre-approved by Crewsaver. All repairs to stitching must be in accordance with this manual.
Description Type

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
Project No : 00164-0104
Date: November 2016
Issue No: 3
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2
Section 2
LIFEJACKET SERVICING SCHEDULE
SERVICED BY:
CERTIFICATE NUMBER:
VESSEL
W/O Number:
LAST SERVICED BY DATE OF LAST SERVICE
SERIAL NUMBER/S:
RQ
CHAMBER INSPECTION COMMENTS
GENERAL CONDITION
MATERIAL
WELDS
WEBBINGS
RETRO TAPE
WHISTLE
ORAL TUBES
RELIEF VALVES
MANIFOLDS
SCHRAEDER VALVES
CYLINDERS
LIGHT
CYALUME POCKET
BUDDY LINE
RQ
INFLATION MECHANISM COMMENTS
OPERATING MECHANISM
CORD
AUTOMATIC CAPSULE
WASHERS
RETAINING NUT
RETAINING CLIP
TOGGLE
RQ
SPRAY HOOD COMMENTS
FABRIC
ATTACHMENT
VELCRO
REPAIRED ITEMS (COMMENTS)
TYPE
CUSTOMER
RQ
WEBBINGS COMMENTS
WAIST BELT / HARNESS
BACK STRAP
LIFTING BECKET
CROTCH STRAP
BUCKLES
STITCHING
ON
OFF
RELIEF VALVE TEST RESULTS FRONT
CHAMBER
OPEN
CLOSE
REAR
CHAMBER
DATE:
RQ
COVER COMMENTS
MATERIAL
VELCRO
ZIP
PLB POCKETS
PRESSURE TEST RESULTS
FRONT
CHAMBER
REAR
CHAMBER
TIME
TEMP. ON OFF

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
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Section
2
2.6 Lifejacket Servicing Tool Kit
Cylinder Torque Strap
UML Mk5i Auto Socket
Manometer
Valve Extraction Tool
Pressure Measuring
Adaptor
Inflation Adaptor
Turned Socket
Calibrated Socket Driver
(Tighten Cylinder)
Calibrated Socket Driver
(Remove & Replace Locking
Nuts For UML & HR)
Calibrated Torque Driver
(Schraeder Valve)

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3.1 Unpacking
3.1.1. Open the zips and velcro around the outside of the cover by peeling the fabric apart. Care should be
taken not to snag the operating cords.
WARNING: All defects should be noted onto the service record sheet.
3.1.2. Remove the operating mechanisms.
3.1.2.1 Following unpacking refer to Fig 3.2 - United Moulders Mk6 Automatic operating head
removal.
3.1.2.1.1 Unscrew the Automatic capsules from the each operating head. Place to one side
for testing and reassembly later. See section 6.
3.1.2.1.2 Carefully remove the inflation cylinders by unscrewing them from the operating
heads. Retain for further inspection . Refer to Section 5.
3.1.2.1.3 Remove operation heads by unscrewing the retaining nuts on the top of the
inflation mechanism. Retain for further inspection . Refer to Section 5.
3.1.3. Remove light and battery if required. Place to one side for further inspection. Refer to section 5
3.1.4. For Cleaning. Refer to Section 4.
3.1.5. Carry out visual inspection. Refer to section 5.
3
Section

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
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Fig 3.1 Unpacking the Lifejacket
3
Section
Fig. 3.1.1 Fig. 3.1.2
Fig. 3.1.3 Fig. 3.1.4
Fig. 3.1.5 Fig. 3.1.6
JERK TO
INFLATE
JERK TO
INFLATE
F R O N T
PERSON
OF 32 KG
OR MORE
Elite Twin
275N
WARNING
ENSURE THE CAP
IS CORRECTLY FITTED
AFTER DEFLATION
JERK TO
INFLATE
USE 60gm
CYLINDER
ONLY
JERK TO
INFLATE
JERK TO
INFLATE
JERK TO
INFLATE
USE 60gm
CYLINDER
ONLY
JERK TO
INFLATE
FOLD UNDER
JERK TO
INFLATE
USE 60gm
CYLINDER
ONLY
FOLD UNDER
0088/99
JERK TO
INFLATE
0088/99
JERK TO
INFLATE
USE 60gm
CYLINDER
ONLY
JERK TO
INFLATE
WARNING
ENSURE THE CAP
IS CORRECTLY FITTED
AFTER DEFLATION
JERK TO
INFLATE
USE 60gm
CYLINDER
ONLY
The lifejacket illustrated above is the standard Elite but the process of unpacking is
the same for the MIRG Elite.

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
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3
Section
Fig. 3.2.3 Fig. 3.2.4
Fig. 3.2.2Fig. 3.2.1
Fig 3.2 United Moulders Mk6 Operating Head
Remove the operating head from the manifold which is
welded to the inflation chamber fabric. Inspect the bottom
sealing O-ring. This must be replaced with a new part if
damaged.
Unscrew the retaining nut from the top of the operating
head. Check for corrosion and discard if corroded.
Inspect the top sealing O-ring. This must be replaced
with a new part if damaged.
Unscrew the 60 gram cylinders from the automatic
operating heads. Once the cylinders have been removed
inspect the cylinder O-Ring seal. Check the seal is in place
and that it is in a good condition. Take the cylinder and
check to see if the cylinder has been used. This should be
performed by check weighing. If under the minimum
weight as displayed on the cylinder body, discard in a safe
manner.
Unscrew the Automatic firing capsule from the end of each
operating head. This should only be done after the test
detailed in Section 6 has been performed in order to test
the old unit, or if the operating head has already been fired.
Discard and replace with a new automatic firing capsule
upon reassembly. The Capsule must be replaced if it
expires before the date of the next annual service.
Please note: The operating head may not match the images above but the processes are always the same.

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4.1 Cleaning Lifejackets
4.1.1 The current standard cover of the MIRG Elite has aluminised, fireproof fabric outer cover that can be
cleaned with care. In the event that contamination is such that the materials are inherently damaged refer
to section 7.
4.1.2 For all types of cover, mud can be removed with clean water and the zip can be cleaned with a stiff (not wire)
brush when dry.
4.1.2.1 Contaminants such as oil or diesel fuel may be sponged off immediately with clean water, allow to
dry naturally.
4.1.2.2 Mud can be removed with a stiff (not wire) brush when dry.
4.1.2.3 Covers may be hand washed in good quality mild detergent in cool water (40°C) rinse well, air drip
dry.
4.1.3 Sponge the inflation chamber with PURE SOAP SOLUTION ONLY. Rinse in clean water immediately, inflate
and air dry.
WARNING: Do not use proprietary cleaning fluids, thinners, spirits or similar substances.
4
Section

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5.1 Outer Cover Inspection
5.2 Inflatable Chamber Inspection
5
Section
5.3 Gas Cylinders
5.1.1 Visually inspect the cover material for wear, abrasion, pulled threads, contamination, cuts and holes. Inspect
the PVC windows, D-Ring and velcro patches. Check the presence of the manual inflation caps and buddy line
in the pouch attached to the waistbelt.
5.1.2 If necessary the cover may be washed. Refer to Section 4.
5.1.3 Effect repairs if necessary and re-inspect for quality of repaired cover. Refer to Section 7.
5.1.4 Carefully examine the zips and the slider for wear, broken teeth or slider and worn or fraying tape.
5.1.5 If it is considered that the cover is beyond economic repair the customer shall be advised and offered a
replacement lifejacket.
NOTE: Due to the construction of this lifejacket no individual cover is available for replacement, therefore the
lifejacket as a whole must be replaced.
5.2.1 Visually inspect the inflation chamber material for wear, pulled threads, contamination or signs of
mistreatment . Inspect the strips of reflective tape.
5.2.2 Visually inspect all welds.
5.2.3 Visually inspect all webbings in accordance with Section 5.7
5.2.4 Visually inspect the whistle and its attachment to the lifejacket for mistreatment, defects, and fraying of the
cord and its attachment.
5.2.5 Test Lifejacket in accordance with Section 6.
5.3.1 Visually examine:
5.3.1.1. For Corrosion (All cylinders corroded with red rust or with visible pitting must be replaced).
5.3.1.2. Pierced or damaged piercing disc.
5.3.1.3. That the two cylinders have the correct gas charge - 60 grams CO2
5.3.2 Check Min Weight of Cylinder against that marked on the barrel.
Remedial Action: If any of the above conditions are found to be incorrect the cylinder shall be replaced. See Section 9.
60 GRAMS CO2 NOMINAL
MIN GR. WT. 245.16
ISI/77209 AUSTRIA 02/07
DO NOT HEAT
Fig. 5.3

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5.4.1 Visually inspect the light for signs of damage to:
5.4.1.1. the trip line; ensure that the toggle is securely attached.
5.4.1.2. the cable.
5.4.1.3. the lens and its mounting or housing.
5.4.2 Check expiry date on battery. The expiry date must exceed the date of the next annual service, if the light has
expired or expires before the next service then it must be replaced. (See Section 9).
5.4.3 Test the assembly as detailed in Section 6
Remedial Action: These items are not repairable refer to Section 9 for replacement Part.
5.5.1 Visually inspect for damage. NB The oral inflation tube on MIRG Training Jackets (Red Cover) should be 60mm
shorter than on the standard MIRG jacket.
5.5.2 Test in accordance with Section 6.
Remedial Action: These items are not repairable refer to Section 9 for replacement Part.
5.6.1 Visually inspect the Operation of the Mechanism for:
5.6.1.1 Operation of the Manual override lever. This shall move easily and freely.
5.6.1.2 Operation of the firing pin cam action. Similarly this shall be a smooth action when
the lever is operated.
5.6.1.3 Firing Pin centre discharge hole clear.
5.6.1.4 Activation lanyard for fraying and damage.
5.6.1.5 Moulded body for cracks and damage. Special attention to be given to the areas
around the operating lever/body connection pin.
5.6.1.6 Check the Automatic plunger.
Remedial Action: In the event that the Operating Mechanism fails any of the above inspection procedures, the complete
unit shall be replaced. No Repairs are allowed. Refer to Section 9 for the part number of the relevant replacement part.
5.6.2 Visually inspect the Operation of the Automatic Capsule:
5.6.2.1 Check plug is in place at the base of the capsule.
5.6.2.2 New Capsules are to be fitted when the expiry date is before the next annual service of the
lifejacket. E.g Capsules marked ‘Replace by 2010’ expire at the end of 2010.
5.6.2.2.1 If the capsule is to be replaced – Re-fit the old capsule and carry out operational tests.
Refer to section 6.
5.6.3 NB. United Moulders Mk5i Capsules (Black) may now be used to replace Mk6 Capsules (Green).
5.6.4 Visually inspect the Manual Override Caps. Ensure that the extra length lanyards and tabs (marked L and
R) are attached.
5.4 Light and Battery
5.5 Oral & Relief Valves
5
Section
MANF. APR07
EXPIRY MAR12
BATCH 0715
L6
FLASHING
LIFEJACKET
LIGHT
MANF. APR07
EXPIRY MAR12
BATCH 0715
L6
FLASHING
LIFEJACKET
LIGHT
5.6 Inflation System
Fig. 5.4

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5.7 Webbings
5.7.1 Visually inspect for damage:
5.7.1.1. Fraying
5.7.1.2. Pulled Threads
5.7.1.3. Broken Stitches
Remedial Action: Effect repairs in accordance with the Repair Procedures within the limits defined in Section 7.
5.8.1 Visually inspect all buckles used on the webbings for signs of damage or corrosion.
Remedial Action: No repairs are allowed. In the case of damage being found return the Lifejacket to Crewsaver.
5.9.1 Visually inspect the spray hood for:
5.9.1.1. Damage to the points of attachment to the Lifejacket.
5.9.1.2. Cracking or crazing of the clear plastic face shield.
5.9.1.3. Damage or degradation of the velcro.
5.9.1.4. Fraying of Material.
5.9.1.5. Check stiffening tube of hood.
Remedial Action: This item is not repairable. Refer to Section 9 for the Part Number of a new Spray Hood.
5.10.1. Check all Markings and Labelling is clear and legible.
Remedial Action: No repairs are allowed. In the case of damage being found return the jacket to Crewsaver.
5.8 Buckles
5.9 Spray Hood (if fitted)
5
Section
5.10 Labelling/Markings

Crewsaver - Servicing Manual : MIRG Elite Twin 275 Lifejacket
Project No : 00164-0104
Date: November 2016
Issue No: 3
Page
of 31
20
6.1.1. Air Holding Test. (Both Chambers must be tested independently)
6.1.1.1 Connect through a suitable Tee piece and adaptor, the oral tube with the oral valve in the open
position, to a graduated water manometer (or a similar digital device for measuring back pressure).
6.1.1.2 Slowly inflate the lifejacket from a regulated supply until the relief valve expels excess.
Warning: Regulated supply pressure must not exceed 20psi.
6.1.1.3 Close off the air supply and leave for 10 minutes to ensure pressure is stable.
6.1.1.4 Check and record the pressure and temperature reading on the Service Record Sheet.
6.1.1.5 Leave for 30 minutes.
6.1.1.6 Check and record the pressure and temperature reading on the Service Record Sheet.
The maximum difference in the two pressure readings (pressure drop) allowed is 10%. The
temperature differential shall be within plus or minus 3 degrees of the original reading. For each
degree Centigrade rise in temperature subtract 2.5 mbar. For each degree Centigrade drop in
temperature add 2.5 mbar to the readings to obtain the actual pressure variation. Should the
temperature variation be outside 3 degrees either way then the test shall be repeated.
6.1.1.7. If Lifejacket fails the Air holding test inspect as follows.
6.1.1.7.1 With the lifejacket inflated carefully brush the surface with a weak solution of soap and water or
alternatively lower the lifejacket into a tank of water to observe for bubbles.
6.1.1.7.2 Identify and mark the source of leakage. Wash off in clean water and allow to dry naturally in air.
6.1.1.7.2.1 Special Attention to be given to:
a) Manifold Schraeder Core
b) Oral Tube/ Top-up Valve
c) Oral Tube/ Relief Valve
6.1 Inflation Chamber
6
Section
PSI
in/H2O in/Hg mm/H2O mm/Hg kg/cm2bar mbar Pa kPa
1.0 27.71 2.036 703.1 51.75 0.0703 0.0689 68.95 6895 6.895
1.1 30.48 2.240 773.4 56.93 0.0773 0.0758 75.85 7585 7.585
1.2 33.25 2.443 843.7 62.10 0.0844 0.0827 82.74 8274 8.274
1.3 36.02 2.647 914.0 67.28 0.0914 0.0896 89.64 8964 8.964
1.4 38.79 2.850 984.3 72.45 0.0984 0.0965 96.53 9653 9.653
1.5 41.57 3.054 1054.7 77.63 0.1055 0.1034 103.43 10343 10.34
1.6 44.34 3.258 1125.0 82.80 0.1125 0.1102 110.32 11032 11.03
1.7 47.11 3.461 1195.3 87.98 0.1195 0.1171 117.22 11722 11.72
1.8 49.88 3.665 1265.6 93.15 0.1265 0.1240 124.11 12411 12.41
1.9 52.65 3.868 1335.9 98.33 0.1336 0.1309 131.01 13101 13.10
2.0 55.42 4.072 1406.2 103.50 0.1406 0.1378 137.90 13790 13.79
2.1 58.19 4.276 1476.5 108.68 0.1476 0.1447 144.80 14480 14.48
2.2 60.96 4.479 1546.8 113.85 0.1547 0.1516 151.69 15169 15.17
2.3 63.73 4.683 1617.1 119.03 0.1617 0.1585 158.59 15859 15.86
2.4 66.50 4.886 1687.4 124.20 0.1687 0.1654 165.48 16548 16.55
2.5 69.28 5.090 1757.8 129.38 0.1758 0.1723 172.38 17238 17.24
2.6 72.05 5.294 1828.1 134.55 0.1828 0.1791 179.27 17927 17.93
2.7 74.82 5.497 1898.4 139.73 0.1898 0.1860 186.17 18617 18.62
2.8 77.59 5.701 1968.7 144.90 0.1968 0.1929 193.06 19306 19.31
2.9 80.36 5.904 2039.0 150.08 0.2039 0.1998 199.96 19996 20.00
3.0 83.13 6.108 2109.3 155.25 0.2109 0.2067 206.85 20685 20.69
3.1 85.90 6.312 2179.6 160.43 0.2179 0.2136 213.75 21375 21.37
3.2 88.67 6.515 2249.9 165.60 0.2250 0.2205 220.64 22064 22.06
3.3 91.44 6.719 2320.2 170.78 0.2320 0.2274 227.54 22754 22.75
3.4 94.21 6.922 2390.5 175.95 0.2390 0.2343 234.43 23443 23.44
3.5 96.99 7.126 2460.9 181.13 0.2461 0.2412 241.33 24133 24.13
3.6 99.76 7.330 2531.2 186.30 0.2531 0.2480 248.22 24822 24.82
3.7 102.53 7.533 2601.5 191.48 0.2601 0.2549 255.12 25512 25.51
3.8 105.30 7.737 2671.8 196.65 0.2671 0.2618 262.01 26201 26.20
3.9 108.07 7.940 2742.1 201.83 0.2742 0.2687 268.91 26891 26.89
4.0 110.84 8.144 2812.4 207.00 0.2812 0.2756 275.80 27580 27.58
4.1 113.61 8.348 2882.7 212.18 0.2882 0.2825 282.70 28270 28.27
4.2 116.38 8.551 2953.0 217.35 0.2953 0.2894 289.59 28959 28.96
4.3 119.15 8.755 3023.3 222.53 0.3023 0.2963 296.49 29649 29.65
4.4 121.92 8.958 3093.6 227.70 0.3093 0.3032 303.38 30338 30.34
4.5 124.70 9.162 3164.0 232.88 0.3164 0.3101 310.28 31028 31.03
4.6 127.47 9.366 3234.3 238.05 0.3234 0.3169 317.17 31717 31.72
4.7 130.24 9.569 3304.6 243.23 0.3304 0.3238 324.07 32407 32.41
4.8 133.01 9.773 3374.9 248.40 0.3374 0.3307 330.96 33096 33.10
4.9 135.78 9.976 3445.2 253.58 0.3445 0.3376 337.86 33786 33.79
5.0 138.55 10.180 3515.5 258.75 0.3515 0.3445 344.75 34475 34.48
5.1 141.32 10.384 3585.8 263.93 0.3585 0.3514 351.65 35165 35.16
5.2 144.09 10.587 3656.1 269.10 0.3656 0.3583 358.54 35854 35.85
5.3 146.86 10.791 3726.4 274.28 0.3726 0.3652 365.44 36544 36.54
5.4 149.63 10.994 3796.7 279.45 0.3796 0.3721 372.33 37233 37.23
5.5 152.41 11.198 3867.1 284.63 0.3867 0.3790 379.23 37923 37.92
5.6 155.18 11.402 3937.4 289.80 0.3937 0.3858 386.12 38612 38.61
5.7 157.95 11.605 4007.7 294.98 0.4007 0.3927 393.02 39302 39.30
5.8 160.72 11.809 4078.0 300.15 0.4077 0.3996 399.91 39991 39.99
5.9 163.49 12.012 4148.3 305.33 0.4148 0.4065 406.81 40681 40.68
6.0 166.26 12.216 4218.6 310.50 0.4218 0.4134 413.70 41370 41.37