Goldhofer AST-2 R User manual

Operation and
Maintenance manual
Goldhofer
Goldhofer O T I Sver orque- ndication- ystem
Documentation GOTIS for AST-2 R
V01-10.2012
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Contents
A GOTIS AST-2 R documentation A - 1
A.1 Introduction A - 1
A.2 Proper use A - 1
1.0 GOTIS Monitoring / Operator Controls 1 - 1
1.1 Indicator lamps in the CDM 1 - 2
1.2 GOTIS key-operated switch 1 - 4
1.2 Approvals 1 - 5
2.0 Description of GOTIS 2 - 1
3.0 GOTIS maintenance intervals 3 - 1
3.1 Explanation of symbols on maintenance schedule 3 - 2
4.0 Maintenance schedule 4 - 1
4.1 GOTIS maintenance records 4 - 2
5.0 Maintenance tasks 5 - 1
5.0.1 GOTIS system check 5 - 1
5.1 Electrical check of GOTIS 5 - 2
5.1.1 Checking the voltage supply to the measuring amplifier 5 - 3
5.1.2 Checking voltage supply to measuring cell 5 - 4
5.1.3 Checking the measuring signal 5 - 5
5.1.4 Checking the output signal at measuring amplifier 5 - 6
5.2 Mechanical test using the GOTIS test tool 5 - 7
5.2.0 Safety notes 5 - 7
5.2.0.1 Hydraulic supply 5 - 8
5.2.0.1.1 Hydraulic supply via the on-board hydraulics 5 - 8
5.2.1 Installing the GOTIS Test tool AST-2 R 5 - 10
5.3 Mechanical check of GOTIS 5 - 11
5.4 GOTIS - Test log 5 - 13
5.4.1 Electrical check 5 - 13
6.0 GOTIS electrical adjustment values 6 - 1
7.0 Troubleshooting List 7 - 1
8.0 Measuring amplifier order form 8 - 1
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Contents
Page 1
Index Designation Chapter / Page
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A GOTIS AST-2 R documentation
This operating and maintenance manual explains GOTIS.
GOTIS means: Goldhofer OverTorque-Indication-System.
A.1 Introduction
This operating and maintenance manual summarises the most
important points for putting GOTIS into operating quickly and safely.
This GOTIS operating and maintenance manual does not replace
the general AST Operating and Maintenance manual. It forms a part
of the AST operating and maintenance manual.
You must comply with the warning instructions in the GOTIS
operating and maintenance manual and in the AST operating and
maintenance manual, in particular the safety information and the
“Important Notes” in the operating manual, as well as statutory
regulations and accident prevention legislation.
A.2 Proper use
GOTIS is a Goldhofer system used to monitor the nose wheel
torques.
GOTIS is used for all aircraft with overtorque requirements that are
approved for the Goldhofer AST product range. (see approvals)
Any other use is deemed to be improper use. The manufacturer is not
liable for any resulting damage; the risk is borne solely by the user.
A further condition of proper use is that the manufacturer’s
prescribed operating, maintenance and repair regulations must be
complied with.
Unauthorised changes to GOTIS will negate all liability by the
manufacturer for any damages that may be incurred as a result of
such changes.
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Chapter A
Primary information Page 1
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1.0 GOTIS Monitoring / Operator Controls
The monitoring / operator controls for GOTIS consist of just three
indicator lamps on the cockpit display module (CDM) and a
key-operated switch located on the internal panelling of the cab.
Indicator lamps in the CDM
GOTIS key-operated switch
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GOTIS Monitoring and Operator Chapter 1
Controls Page 1
Fig. 1 Monitoring / operator controls for GOTIS
indicator lamps in the CDM 1-1
Fig. 2 Monitoring / operator controls for GOTIS
key-operated switch in the cab
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1.1 Indicator lamps in the CDM
Please also observe Part 1 of the the Operating Instructions (BA).
Item Name Description
1 Status of vehicle and GOTIS Lit green
When the green indicator lamp is illuminated, it
means that the vehicle and GOTIS are ready for
operation.
An aircraft with overtorque requirement may be moved only
when the status lamp (green) is signalling ready for operation,
after the aircraft has been picked up and throughout the
journey.
In the case of aircraft without overtorque requirement, the
status lamp (green) is likewise illuminated, indicating that it is
ready for operation. In this case however, ready for operation
does not mean that the aircraft is being monitored by GOTIS.
If, having selected the wrong aircraft (see also Part 1 of the AST
operating instructions) on the TDM, that selection is confirmed
a second time, the Operator bears sole responsibility for the
procedure. The manufacturer is not liable for any damage
arising from such action.
BA part 1/0 GOTIS AST-2 R
Page 2
Fig. 3 Indicator lamps in the CDM
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Item Name Description
2 Warning lamp (yellow) Warning
threshold
If the torque at the nose wheel exceeds 70% of the
current limit value, the yellow warning light starts to
flash. At the same time a buzzer sounds at regular
intervals.
If the torque steer force is reduced, the warning lamp goes out and
the buzzer stops sounding.
3 Alarm lamp (red) Alarm threshold
If the torque at the nose wheel exceeds the current
limit value, the red alarm lamp illuminates as well as
the yellow warning lamp.
At the same time a buzzer sounds at regular
intervals.
If the red alarm lamp is lit, the operator must specify and
document corresponding follow-up measures compliant with
all applicable regulations.
We recommend that all such measures are provided as AST
work instructions to the operator / driver.
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GOTIS Monitoring and Operator Chapter 1
Controls Page 3
Fig. 4 GOTIS Monitoring / Operator Controls
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1.2 GOTIS key-operated switch
The GOTIS key-operated switch (EST08) is attached to the inner
panelling in the cab and not to the seat turning device.
(also see Operating Instructions BA Part 1, Chapter 240)
Item Name Description
EST08 Key switch Reset GOTIS
alarm
This key-operated switch can be used to reset the
alarm threshold (red alarm lamp) to normal
operation.
The ALARM may be reset only by authorised
personnel. The Operator must establish the
definition of authorised personnel.
Reset GOTIS
alarm
1. Switch on the GOTIS key-operated switch (EST08).
2. Switch off the ignition
3. Switch off the GOTIS key-operated switch (EST08).
4. Switch on the ignition
BA part 1/0 GOTIS AST-2 R
Page 4
Fig. 5 GOTIS key-operated switch
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