Schleicher ASW 27 User manual

ASW 27 Maintenance Manual
Rev.No / Date Sig Author Date Page No.
TN 11 26.06.07 mg Juw/GW 20.01.97
The elevator actuator must be protected from damage. A wooden block of ap-
propriate height must be laid under the fin-stabilizer attachment area.
WARNING: After rotating the fuselage back upright remove the tape!
Remove spilled fluid and clean with cleaning spirit. Check
brake fluid level!
Ground Transport
The wings may be supported at the spar stubs, root
ribs and wing tips. Remove winglets before!
2.10 Tow Releases
The tow release fitted at the C.G. is model TOST "Europa G 88" (Data Sheet
No:60.230/2).
Models TOST "Europa G 72 or G 73" may be used as a replacement tow re-
lease.
Depending on the position of its installation, different aerotow release models
may be installed.
In the tip of the fuselage nose, model TOST “E 22” is used (Data Sheet
No:11.402/9 NTS).
Between stick and pedals, models TOST "E 85" or "E 72" or "E 75" are used.
(Data Sheet No:60.230/1).
The replacement of tow release couplings is described in Section 10.4.
2.23

ASW 27 Maintenance Manual
Rev.No / Date Sig Author Date Page No.
TN 11 26.06.07 mg Juw/GW 20.01.97
4.2 Special Servicing Procedures and Equipment subject to Service
Life Limitations
Special Servicing Procedures
At regular intervals of 5 years, the sealing rings and groove sealing rings of the
water ballast valves must be checked, and replaced if required (see Fig. 2.4-1).
At regular intervals of 6 years the brake line hose of the hydraulic wheel brake
must be replaced. Should this hose be found to be in good condition, it need not
be replaced, on condition that its condition is checked at least every 100 flying
hours.
Equipment subject to Service Life Limitations
Tow Releases
The tow release fitted at the C.G. is model TOST "Europa G 88" or "G 72" or
"G 73" respectively ,
The aerotow release is either the model TOST “E 22” (if installed at the tip of the
fuselage nose) or one of the models TOST "E 85" or "E 72" or "E 75" (if installed
between pedals and stick).
The above TOST tow releases must comply with the service life limitations
between inspections as laid down in their respective authorized release certifi-
cates.
The relevant "Operations and maintenance instructions" issued by the manufac-
turer TOST must be complied with.
4.4

ASW 27 Maintenance Manual
Rev.No / Date Sig Author Date Page No.
TN 11 26.06.07 mg Juw/GW 20.01.97
= D i e s e V e r b i n d u n g e n v o r j e d e r M o n t a g e s ä u b e r n u n d f e t t e n ! = B e i j ä h r l i c h e r Ü b e r h o l u n g f e t t e n ! = A l l e 5 J a h r e f e t t e n !
= M e s s i n g l a g e r n i c h t m i t M o
2
- c h m i e r m i t t e l f e t t e n !
Fig. 8.0-1 Lubrication Chart
8.4
= These rigging points to be cleaned and greased every time the
glider is rigged
= These points to be greased in the course of the annual C. of A.
inspection
= Grease every five years only! Do not use MoS2-based lubricants on brass bearings

ASW 27 Maintenance Manual
Rev.No / Date Sig Author Date Page No.
TN 11 26.06.07 mg Juw/GW 20.01.97
10.4 Removing and installing tow releases
10.4.1 Tow release coupling fitted at the c.g.
1. Remove the seat back and the seat pan.
2. Undo the safety springs from the L/G doors.
3. Remove the wheel. First proceed as described in Section 2.3.4 “Exchange
of Brake Linings”: dismount the wheel brake cylinder. The brake hoseline
must be left attached throughout! The bolt which holds the torque plate of
the wheel brake cylinder, and the wheel axle must be removed. Now the
wheel with the wheel brake cylinder can be pulled off the wheel fork.
4. Take the two safety springs off the horizontal struts.
5. Remove the shock absorber legs.
6. Unscrew the release cable off the end fitting and turn out the three bolts
which hold the tow release coupling. Pull out the release coupling to the
front.
10.4.2 Tow release fitted at the nose
If installed between pedals and stick:
1. Remove the pedal adjustment cable and knob, if necessary also the trim
indicator
2. Remove the back rest and unscrew the seat pan.
3. Turn out the three bolts which hold the tow release. Pull out the release to
the rear.
If installed at the tip of the nose:
1. Move rudder pedals backwards. It may be handy to tie them down.
2. Remove cover from the bulkhead visible in the fuselage nose.
3. The release is then visible through the first bulkhead. Two brackets hold it
attached to the second bulkhead. Remove the four nuts from the brackets.
4. Pull out the release to the rear. It fits easily through the first bulkhead when
it is swayed a bit.
5. Pull one of the pins at the release rope fitting and unscrew the brack-ets
Installing the tow releases is done in the reverse order.
When installing the nose hook, use only new split pins. Take care that none of
the pins on the rope attachment can hit the housing. Do not for-get to screw on
the ground line together with the bracket. Attach the bulkhead cover with sili-
cone.
When re-fitting tow releases, care should be taken to always use bolts of
strength grade 10.9 or even 12.9 and nuts of the strength grade 6. When the
tow releases are exchanged, new bolts and nuts must be used for re-
installation. See also "Operating Manuals for tow release couplings" from
Messrs. Tost.
10.6

ASW 27 Maintenance Manual
Rev.No / Date Sig Author Date Page No.
TN 11 26.06.07 mg Juw/GW 20.01.97
12.4 List of Maintenance Documents for Fitted Equipment
a) Operating Manual for Tow Release Coupling Series
"Europa G 88" Safety Tow Release, in its valid issue
or
Operating Manual for Tow Release Coupling Series
Safety Tow Release "Europa G 72" and "Europa G 73", in its valid issue
Operating Manual for Tow Release Coupling Series
Nose Tow Release Hook "E 85”, in its valid issue
or
Operating Manual for Tow Release Coupling Series
Nose Tow Release "E 72” and “E75”, in its valid issue
or
Operating Manual for Tow Release Coupling Series
Nose/Tail Release "E 22”, in its valid issue
b) WHEEL and BRAKE ASSEMBLIES CATALOG
Component Maintenance Manual,
Appendix A, Fits and Clearances
A-1. Brake Lining Wear Limits
A-2. Brake Disc Minimum Thickness
by Parker Hannifin Corporation, Avon, Ohio
12.6