GE PROPRIETARY INFORMATION The information contained in this document is GE proprietary information and is disclosed in confidence. It is the property of GE and shall not be used, disclosed to others, or reproduced without the express written consent of GE, including, but without limitation, it is not to be used in the creation, manufacture, development, or derivation of any repairs, modifications, spare parts, designs, or configuration changes or to obtain regulatory approval to do so. If consent is given for reproduction in whole or in part, this notice and the notice set forth on each page of this document shall appear in any such reproduction in whole or in part. Page: 1 / 9



# Alert Service Bulletin

Approved by Document ID/Revision No.

Issued on Huck, Steve SB-2016-72-50-00-1/00

21-Jan-2016

This document was approved and issued via the GE Aviation Turboprop Document Workflow Process. ALERT-SERVICE-BULLETIN-PTDISK-INSPECTIONPage: 2 / 9 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANKAlert Service Bulletin No./Rev. :

ISSUED REVISED GE Aviation Czech tel.: +420 251 041 111
Beranových 65 fax: +420 257 216 983
199 02 Praha 9

– Letňany Czech Republic
tel.: +420 222 538 111
fax: +420 222 538 222 PAGE No. REVISION

01 21 2016

- - - 3 of 9

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GE PROPRIETARY INFORMATION: Subject to the restrictions on the cover page. Page: 3 / 9



# Alert Service Bulletin

GE PROPRIETARY INFORMATION The information contained in this document is GE proprietary information and is disclosed in confidence. It is the property of GE and shall not be used, disclosed to others, or reproduced without the express written consent of GE, including, but without limitation, it is not to be used in the creation, manufacture, development, or derivation of any repairs, modifications, spare parts, designs, or configuration changes or to obtain regulatory approval to do so. If consent is given for reproduction in whole or in part, this notice and the notice set forth on each page of this document shall appear in any such reproduction in whole or in part.



### SUBJECT

The Power Turbine (PT) disc inspection in accordance with M601E Overhaul Manual and M601 engine models appropriate Maintenance Manuals.
This is an Alert Service Bulletin, it is expected that it will be mandated by an Airworthiness Directive.



### 1. PLANNING INFORMATION

1.1. Effectivity

M601 engines with serial numbers listed in appendix A.

1.2. Compliance

Engines listed in appendix A. Perform the inspection until the engine reaches PT disc equivalent cycles and/or compliance time listed in appendix A.

1.3. Reason

Purpose of the Power Turbine disc inspection is identification of the PT disc damage in the area of the balancing weights and identification of the PT disc with non conforming geometry of slot radius. The PT disc damage could occur during last shop visit or overhaul. The non conformance could occur during machining of the PT disc slot.

1.4. Safety Intent

Intent of the SB is inspection of potentially damaged PT discs and/or non conforming slot geometry of PT disc (if appropriate their replacement) to prevent hazardous effect.

1.5. Configuration Description

Configuration of the part does not change. SB-2016-72-50-00-1/00Alert Service Bulletin No./Rev. :

ISSUED REVISED GE Aviation Czech tel.: +420 251 041 111
Beranových 65 fax: +420 257 216 983
199 02 Praha 9

– Letňany Czech Republic
tel.: +420 222 538 111
fax: +420 222 538 222 PAGE No. REVISION

01 21 2016

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GE PROPRIETARY INFORMATION: Subject to the restrictions on the cover page. Page: 4 / 9 1.6. Description

I. Power Turbine section needs to be removed from the wing, disassembled, inspected (see chap. 1.12) and assembled in accordance with appendix B.

II. Inspections 1 & 2 need to be performed by GEAC Customer Support Product Organization (CSPO) trained personal.

III. After inspection, Power Turbine disc balancing plugs must be replaced. Consequently, the Power

Turbine disc must be rebalanced and reinstalled. This work scope can be performed in an authorized service centers only.

1.7. Approval

The technical content of this document is approved under the authority of DOA No. EASA.21J.300.

1.8. Manpower

7 days

1.9. Expenses

GE Aviation covers the cost of return engine shipping to operator (Incoterms 2010

– Delivered at Place [DAP]), cost of labor & material required for inspection and repair of Power Turbine disc in repairable condition, cost of final engine performance test.
Operator covers the cost of engine shipping to authorized service center (Incoterms 2010

– Delivered at Place [DAP]), cost of replacement Power Turbine disc in case original removed Power Turbine disc is considered non-airworthy and/or beyond economical repair. GE Aviation will give 70% concession on

re placement of Power Turbine disc “

.

1.10. References

M601E Overhaul Manual
M601 engine models appropriate Maintenance Manuals

1.11. Other Publications affected

None

1.12. Supplemental Information

Inspection 1 # PT Disc inspection Instruction of the area below balancing plugs:

Note

– All balancing plugs need to be removed prior to area ‘A’ inspection

Perform Inspection of area ‘A’ (see Picture 1 below):

1. Visual Inspection

– perform visual inspection under the good lighting (min 1000 LUX) with the magnifying glass (5x magnification) of the disk body - area ‘A’ (see picture below) according to the criteria listed in table 1. Pay particular attention to the areas below balancing holes. SB-2016-72-50-00-1/00Alert Service Bulletin No./Rev. :

ISSUED REVISED GE Aviation Czech tel.: +420 251 041 111
Beranových 65 fax: +420 257 216 983
199 02 Praha 9

– Letňany Czech Republic
tel.: +420 222 538 111
fax: +420 222 538 222 PAGE No. REVISION

01 21 2016

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GE PROPRIETARY INFORMATION: Subject to the restrictions on the cover page. Page: 5 / 9 2. FPI Inspection

– perform the FPI inspection of the disk body (per GEAC instruction P34.39) - area ‘A’ (see Picture 1 below) according to the criteria listed in the table 1. Pay extra attention to the areas below balancing holes.

Picture 1

– Description of the required inspection area

Table 1 - PT Disc area ‘A’ inspection 1 acceptance criteria

Description Power Turbine Disc Part Number

M601

- 3220.6 M601

- 3220.5

Witness mark with no perceptible depth Replace, quarantine, repair being developed Accept as is

Dot indication
If not deeper than 0.05mm and diameter less than 0.1mm Replace, quarantine, repair being developed Accept as is

False drilled dimple
If depth is between 0.05mm to 0.08mm and diameter more than
0.1mm Replace, quarantine, repair being developed Replace, quarantine, repair being developed

False drilled dimple
Depth is more than 0.08mm Replace Replace

Linear FPI indication Replace Replace Pay extra attention in the areas below the balancing holes 

## Surface Area ‘A’
(highlighted in red) SB-2016-72-50-00-1/00Alert Service Bulletin No./Rev. :

ISSUED REVISED GE Aviation Czech tel.: +420 251 041 111
Beranových 65 fax: +420 257 216 983
199 02 Praha 9

– Letňany Czech Republic
tel.: +420 222 538 111
fax: +420 222 538 222 PAGE No. REVISION

01 21 2016

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GE PROPRIETARY INFORMATION: Subject to the restrictions on the cover page. Page: 6 / 9 Inspection 2 # PT Disc inspection Instruction of the PT disc slot area:

Note

– All balancing plugs need to be removed prior to area ‘B’ inspection
Perform Inspection of area ‘B’ (see Picture 2 below):

1) Visual Inspection

– perform visual inspection under the good lighting (min 1000 LUX) with the magnifying glass (5x magnification) of the disk slot - area ‘B’ (see picture 2 below) according to the criteria listed in table 2. Pay particular attention to the areas at radius transition of the slot.

2) Dimensional Inspection

– perform dimensional inspection of the disk slot radii (R 1 and R 2 ) and slot diameter ‘diam_A’ (see picture 3 below) located in area ‘B’ (see picture 2 below) according to the criteria listed in table 2. Dimensional inspection of the R 1 , R 2 and ‘diam_A’ to be performed at 4 equally spaced places around the slot circumference (measurement to be taken every 90 deg)

3) FPI Inspection

– perform the FPI inspection of the disk slot (per GEAC instruction P34.39) - area ‘B’ (see picture 2 below) according to the criteria listed in table 2. Pay extra attention to the areas at radius transition of the slot SB-2016-72-50-00-1/00Alert Service Bulletin No./Rev. :

ISSUED REVISED GE Aviation Czech tel.: +420 251 041 111
Beranových 65 fax: +420 257 216 983
199 02 Praha 9

– Letňany Czech Republic
tel.: +420 222 538 111
fax: +420 222 538 222 PAGE No. REVISION

01 21 2016

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GE PROPRIETARY INFORMATION: Subject to the restrictions on the cover page. Page: 7 / 9 Picture 2 - Description of the required inspection area

Picture 3 - Dimensions to be checked (R 1 , R 2 and ‘diam_A’) Pay extra attention in the areas marked below at radius transition of the slot 

## Surface Area ‘B’
(highlighted in red) SB-2016-72-50-00-1/00Alert Service Bulletin No./Rev. :

ISSUED REVISED GE Aviation Czech tel.: +420 251 041 111
Beranových 65 fax: +420 257 216 983
199 02 Praha 9

– Letňany Czech Republic
tel.: +420 222 538 111
fax: +420 222 538 222 PAGE No. REVISION

01 21 2016

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GE PROPRIETARY INFORMATION: Subject to the restrictions on the cover page. Page: 8 / 9 Table 2 - PT Disc area ‘B’ inspection 2 acceptance criteria

Description Power Turbine Disc Part Number

M601

- 3220.6 & .5 Surface imperfections / tooling marks Replace

Linear FPI indication Replace

R 1 , R 2 not equal to 1+/

- 0.2 mm Replace, quarantine, repair being developed Diam_A not equal to 45+/

- 0.2 mm Replace



### 2. ACCOMPLISHMENT INSTR UCTIONS

2.1. According to 1.6. & 1.12

2.2. Record an accomplishment of this Alert Service Bulletin in the Engine Log Book, including the date and the name of the person who has accomplished the Alert Service Bulletin.

2.3. Send the inspection report t o the GEAC Design Organization in accordance with the Engine’s Reliability

program.



### 3. MATERIAL INFORMATION

Required material and tooling are listed in appendix B.



### 4. APPENDICES

Appendix A

– List of serial numbers called Engines
Appendix B - Inspection instruction SB-2016-72-50-00-1/00Alert Service Bulletin No./Rev. :

ISSUED REVISED GE Aviation Czech tel.: +420 251 041 111
Beranových 65 fax: +420 257 216 983
199 02 Praha 9

– Letňany Czech Republic
tel.: +420 222 538 111
fax: +420 222 538 222 PAGE No. REVISION

01 21 2016

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GE PROPRIETARY INFORMATION: Subject to the restrictions on the cover page. Page: 9 / 9 APPENDIX A - List of serial numbers called Engines

Engine Type Engine

Serial Number Estimated

equivalent*
CSO For engine till required inspection Compliance

deadline Engine

Type Engine

Serial Number Estimated

equivalent*
CSO For engine till required inspection Compliance

deadline

E11 922009 2 849

Jan

- 16 E 874025 2 210

Apr

- 16 E 894031 2 936 E 881012 2 214

D2 932002 2 977 E11 881020 2 244

D2 864005 3 583 E 881021 2 193

E 882035 2 240

E 872013 2 234

Feb

- 16 E 882046 2 155

E 9 13006 2 250 E 882049 2 211

D1 894019 2 737 E 883017 2 250

D1 833027 2 575 E 883025 2 211

D1 852052 2 620 E 883037 2 230

E 883065 2 240

E 903001 2 250

Mar

- 16 E 884029 2 151

D 8 74004 2 250 E 891022 2 250

D 874006 2 250 E 891033 2 240

D 912018 2 250 E 891042 2 210

E 894010 2 240

E 883061 2 029

Apr

- 16 E21 904022 1 948

E 9 01043 2 172 E 904032 2 138

Z 931002 2 211 E 911001 2 240

E11 833244 2 172 E 911031 1 774

D 842066 2 240 D 912006 2 176

E 862003 2 240 E 913009 2 138

E 864204 2 154 E 914004 2 240

E 871001 2 156 E 914017 2 240

E 871016 2 061 E 922003 2 240

E 873039 2 240 E 941014 2 165

E 873041 2 250

*equivalent cycles

– see definition in engine log book SB-2016-72-50-00-1/00

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 1 

# INSPECTION INSTRUCTI ON

CONTENT

1 Before disassembly 2

2 Disassembly 3

3 Disassembly of exhaust system 28

4 Disassembly of PT disc balancing plugs 35

5 PT disk inspection: 40

6 Assembly of balancing plugs 44

7 Assembly of the exhaust system 56

8 Assembly 71

9 Verification of the engine function 93

10 MATERIAL INFORMATION 93

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 2 1. Before disassembly
Measure the engine vibration on the wing, Power Turbine and GGT section in accordance with appropriate engine model Maintenance Manual, chp. 72.01.01 2.

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 3 2. Disassembly

2.1. Disassemble the bonnet and propeller from the engine

2.2. Close the bleeding valve and seal the intake screen to the engine and exhaust bends (on aircrafts with short exhausts) or disassemble the exhaust bends at the flanges (aircrafts with long exhausts).

2.3. Release from the engine ( from the accessory gearbox and reduction gearbox ) oil to prepared container. To do so, disassemble from the engine the electromagnetic signaler of chips (can be left suspended on a cable) and to its place, install the preparation for release of oil from the reduction gearbox

– 903.7. On the accessory gearbox, remove the magnetic plug - 572.9 and assemble preparation - 9020.7. After release of oil from accessory gearbox, put back the magnetic plug and secure it. Close the bleeding
valve.

Seal both exhausts bends.



### motoru Seal the intake

screen.

Release oil from the
reduc tion gearbox using the

- 903.7 equipment

. Release oil from the accessory gearbox using

- 9020.7 equipment . After release, take out the preparation and reinstall
here and secure with magnetic plug.

Flange for electromagnetic signaller of chips Check tightness of the flange for magnetic plug before securing.

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GE PROPRIETARY INFORMATION P a g e | 4 2.4. Disassemble the extinguishing installation around the reduction gearbox including the holders (if assembled). Cover all pipes and openings

.

2.5. Disconnect the operating rod of the propeller governor from the propeller governor and disconnect it from the reduction gearbox flange including the holder (according to the version). Disassemble the installation including the holder from the
fire detector. Disassemble the
installation from the
front bulkhead and the extinguishing pipe. Disassemble the installation from the flange of the reduc tion gearbox including the holders on both sides. 2x2 pieces of M6 nuts.

After disconnecting the
rod from the governor , disassemble it together
with holder from the
reduc tion gearbox flange. 2 pieces of M6 nuts.

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 5 2.6. Disassemble the pipe of the feathering pump (if assembled together with EHO, on the engine versions M601D the pipe is connected on the front bulkhead). Cover the pipe and openings.

D isconnect the
electrical
installation
cable from the pipe

. Unlock and loosen cap nuts. Disassemble the cap

on the front bulkhead

Rear bulkhead Front
bulkhead

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 6 2.7. Disassemble the control device of the propeller governor.

2.7.1. Unlock and loosen nut - 7142.4, fixing the eye-bending shafts of kinetic link - 703.9 to the double- lever, remove the eye from the double- lever pin (pin on the shorter arm of the double- l ever).

2.7.2. Disconnect the control pipe from the holder on the exhaust set. Loosen both nuts on the outlet flange and disconnect the control case M601- 731.4 from the flange.

2.7.1

. 2.7.2

. Pertinax
insulation. Liner

Holder of the
control bushing Exhaust housing
holder is between
the screw head
and insulation.

Individual eyes of the rods with spherical bearings secure with wire to prevent their falling out and getting
lost.

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 7 2.8. Disassemble the pipe to EHA - 864.9 (if assembled together with EHA) from the screwing of the propeller governor and electrohydraulic actuator and slide electrical installation cable with the propeller heating collector under it (if heating is assembled, otherwise do not unlock or loosen). Put the pipe back but do not secure it.

2.9. Disassemble all the electric installation from the reduction gearbox (i.e. from the propeller governor, electromagnetic chip signaler, electrohydraulic actuator (if assembled) speed transmitter, fire detector (if assembled) and ELM cable (if assembled) including holders to the cable installation. On electrical installation, disassembled electromagnetic chip signaler, collector for propeller heating (if assembled) and fire detector (if assembled) can be left. Unlock and loosen
the hollow screw

. Unlock and loosen the cap nut on the propeller governor

. From the pipe

- 864.9
disassemble the electrical
installation cables. Leave holders where they are.

Note: Prior to the disassembly of the electri c installation holder and the fire detector cable from the main flange of the reduc tion gearbox,
mark the screws which the holders were assembled to . Thus, the subsequent assembly will be easier.

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 8 2.10. D isassemble the front holder - 848.6 of the electric installation on the top connection of the exhaust housing fixed with 3 screws.

2.11. Disassemble the air sealing pipe - 828.7 from the flange on the exhaust housing, the air sealing pipe of the PT labyrinth - 861.9 from the bulkhead and from the air intake pipe - 1408.7. Cover the pipes. Disassemble the front holder

- 848.6

( electric installation ). Disassemble three
screws with self

- locking nuts.

Disassemble the air sealing pipe

- 828.7 from the flange on
the exhaust housing
(2 screws with lock
washers)

, from the
bulkhead
(disassemble covers)

, from the air in take pipe and from the P T labyrinth air sealing pipe (cap nut).

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 9 2.12. Remove the air sealing pipe - 880.9 and its sealing from the exhaust housing flange.

Remove the air sealing pipe

- 880.9 including sealing
from the exhaust housing flange.

Sealing

If the pipe cannot be removed using hands, an extreme solution is holding the flange over a cloth in pliers and carefully removing it. Under no circumstances the pipe can be levered under the flange.

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 10 2.13. Disassemble the pressure oil pipe to GT 839.6 from the pressure oil pipe - 826.6 and pressure oil bushing - 827.9. Cover screwing and the pipe.

2.14. Disassemble the pressure oil pipe - 826.6, cover the openings.

2.15. Disassemble the scavenge pipe from the reduction gearbox - 827.6, cover the openings.

The p ressure oil pipe

- 826.6 The scavenge p ipe

- 827.6

Pull the pipes

- 826.6
and

- 827.6 from the accessory gearbox.

Cover the openings. Disassemble the holders
from the divinding plane of the engine. Disassemble the
covers from the front
bulkhead , dispose of the sealing and leave
the rubber washer for subsequent disassembly. 2 .13
Disassemble the pressure oil pipe to

GT

- 839.6.

For easier disassembly of the pipes s quirt
with lubricant. Unlock the lock washers,
loosen and disassemble the nuts on both pipes 4 pieces.

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 11 2.16. Disassemble the pressure oil bushing by loosening cap nut - 3006.9 from the oil intake pipe 343.9. Push the cap nut - 3006.9 along the pipe - 343.9 to the exhaust housing.

2.17. Disconnect the torquemeter pipe - 840.6 from the pipe - 841.6. Remove the covers, the sealing and the rubber insert from the front bulkhead. The pipe could be left connected to the reduction gearbox and exhaust housing, but to make the following halving of the engine easier, it is recommended to disassemble the pipe. Cover the openings

. Hol d the bushing with
wrench against the
cap nut

- 3006.9 and
loosen it.

Sejměte z trubky
krytky, těsnění a
gumovou vložku. The pipe can be left
assembled to the reduc tion gearbox and exhaust housing

. Disassemble covers,
rubber insert and sealing from the
bulkhead

. After disassembly of the bushing, push the
cap nut into the exhaust housing. After disassembly, check that the sealing ring remained on the bushing,
or take it out from the pipe

- 343.9 to prevent its falling in the engine.

Pipe

- 841.6

Disconnect the pipe

- 840.6

from the pipe

- 841.6.

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 12 2.18. If you decide to disassemble the pipe, unlock, loosen and screw out the screw of the holder on the exhaust case. Then unlock and screw out two screws connecting the pipe to the reduction gearbox flange. Then disassemble the pipe. Seal the pipes and openings.

2.19. After disconnecting the torquemeter pipe from pipe - 841.6 and sealing them, attach cover to the pipe - 841.6 to prevent forgetting it during assembly.

Disassemble the pipe from the engine, seal reduction gearbox and pipes

- 841.6 and

- 840.6.

Pipe

- 841.6

Fix the cover to pipe

- 841.6 to prevent forgetting it later.

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 13 2.20. Disassemble the scavenge oil bushing - 8030.9 by loosening the cap nut on the oil drain pipe - 862.8 and the cap nut -3007.9 on the scavenge oil pipe - 304.7. Push the cap nut - 3007.9 into the exhaust housing.

2.21. Disassemble the screw of the drain pipe LN 6169 with sealing rings 10x14 CSN 02 9310 connecting the drain pipe - 806.7 to the flange on the exhaust housing.

Disassemble the screw of the drain pipe. Cover the pipe after the

screw remov al

. Disassemble the drain oil bushing. After bushing disassembly, cover the oil drain pipe and push the cap nut into the exhaust housing

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 14 2.22. Disassemble the thermocouple transmitters cables. Then disassemble the thermocouple set bus from the flange. Move the bus away from the engine similarly as in 2.9

. 2.23. Disassemble individual thermocouple transmitters. Mark the thermocouples or write down their correct location for assembly (M601E, M601F, M601T, GE H- series). Verify the function of thermocouple transmitters using multimeter.

Move the ca bles away from the engine in front of the front bulkhead.

Cover the flanges after thermocouples with adhesive plaster. Carefully take the thermocouples out of the engine.

Disassemble
cables from thermocouples. Mark the

t hermocouples
for the

re assembly. Then store them safely away from the engine.

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 15 2.24. Disassemble and remove screws and nuts connecting the flange of the exhaust housing with the flange of the centrifugal compressor housing that have various holders under nuts (all long screws). Leave the other screws.

2.25. Remove self- locking nut with washer on the centring screw of the reduction gearbox and fourth screw with nut in the longitudinal parting flange of the exhaust system and insert the “reduction gearbox holder” (first part of preparation). Disassemble and take out
screws and nuts from the exhaust housing flange and centrifugal compressor housing that have various
holders under nuts (i.e. all long screws).

First part of engine halving preparation,
“reduc tion gearbox
holder” fix under the self

locking nut and its washer on the centring
screw and under fourth screw of the longitudinal parting f lange. “Reduc tion gearbox holder” (first part of preparation for engine halving. Leave short screws
with nuts.

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 16 2.26. Remove the centring screw with nut and then three screws with nuts from longitudinal parting flange counted from the centrifugal compressor flange ( on top and bottom part at cross dividing plane) and assemble part of the exhaust system holder with centring needles (the other part of the engine halving preparation). According to the picture.

Slide cent e ring needle of the other part of the preparation to the opening in cross parting flange and then assemble the preparati on to the longitudinal parting flange.

Assemble the other part of the engine halving preparation using two technological screws and nuts that are part of it. Tighten the screws and nuts. Between the preparation
and flange, insert spacer that is part of the preparation

In the bottom, fix the preparation with centring needle the same as the top part. Do not tighten the

screws and nuts here. Top part

Bottom part

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 17 2.27. From the assembled mount, take one by one pins and replace them with technological pins that are part of the preparation. Before disassembly, cover the air inlet screen to the compressor (if haven’t done at the beginning of the disassembly) to prevent foreign objects falling in the

compressor

.
Unlock cotter pin,
disassemble and replace pins of the engine mount with technological pins of the preparation.

Third part of the preparation.

Easily tighten technological pins of the preparation so that the pin could be still moved.

Final look of the assembled third part of the preparation. At other types of engine mount , assemble flanges that are part of the preparation and fix the third part of the engine halving preparation to them

.

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 18 2.28. Assemble to the engine the supporting part of the engine halving preparation, and place it on the top hinge of the engine and to achieve the right preparation position, insert centring ring on it. Then insert big spacer on the supporting part.

Big spacer

Centring ring

Supporting part of the preparation

Insert centring ring over the cutout to the opening on the preparation and turn it so
that it locks on the preparation. Insert regulation washer

to the preparation.

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 19 2.29. On the assembled supporting part of the preparation, assemble the bearing part. Then insert pin with spacer and secure with cotter pin.

After assembling the bearing part, insert pin with small spacer so that the openings for cotter pin were aligned. Bearing part of the engine halving preparation

Secure the bearing part of the preparation with cotter pin. Slide the bearing part of the preparation to the supporting one. Pin Small spacer

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 20 2.30. Connect the third part of the preparation with the assembled bearing and supporting parts using screw with washer. After tightening the screw, set the bearing part of the preparation so that the bottom part of the preparation is vertically away from the place on the reductiojn gearbox as in the picture 345 mm. Execute petting with two adjusting screws on the third part of engine halving preparation.

Connect the third part of the preparation with assembler supporting and b e a ring part using screw with washer.

345mm 

## . U sing adjusting screws, set the
b e a ring par t so
that the bottom part is 34 5 m m away from the marked place on
the reduc tion

gear box.

Place for measuring
vertical
distance to the preparation.

### APPENDIX B to ALERT SERVICE BULLETIN No. SB -2016- 72

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GE PROPRIETARY INFORMATION P a g e | 21 2.31. From the case of the halving preparation, take out the other part, “slider” and assemble it to operational state. Then slide it on the bearing part of the preparation and fix it to the first and second part of the preparation. Then set it so both holders are perpendicular to the longitudinal axis of the engine.

“Rider” part of the preparation.

Assemble the “ slider ” to operational state and slide it on the bearing part of the engine halving preparation.

Set the preparation so
that both holders are perpendicular to the longitudinal axis of the engine.

Fix the “ slider ” to the reduc tion gearbox holder and to the other part with centring needle of the engine halving preparation, connect to the
reduc tion gearbox holder by second or third eye.

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GE PROPRIETARY INFORMATION P a g e | 22 2.32. After assembling the preparation pre- tighten the system using screw No. 1 by 15 mm (which means 330 mm) and set so that the back holder is free without extra tension. This holder is meant to catch the back part of the exhaust system all the way to putting out the whole exhaust system outside centring needles.

Place on the reduc tion gearbox from which the distance of the pre

tightening is measured. Back holder set
so it is free
without extra
tension. This
holder is meant
to catch the back part of the exhaust system all the way to putting out the whole system. Pre

- tighten the system using
screw No. 1 so that the bottom part of the bearing is 330 mm away from the place marked on
the reduction gearbox.

Screw No. 2 Screw No. 1

Pre

- tighten by 15 mm to

330 mm. 330 mm In the front part, secure the preparation with stopper (screw) to prevent falling of
the „slider“

.

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GE PROPRIETARY INFORMATION P a g e | 23 2.33. Screw out the nuts on the remaining screws of the exhaust housing flange and centrifugal compressor housing flange by approx. 4 mm. To the openings, insert crosswise 6 leading needles. Check that there is no thermocouple or air sealing pipe - 836.6 in the exhaust housing, check that the cap nut - 3006.9 and 3007.9 are on the oil intake pipes - 343.9 and oil discharge pipe - 304.7 inserted to the internal space of the exhaust housing not preventing pulling out.

Execute complete check of the engine and make sure that no part will prevent pushing away of the exhaust system from the centrifugal

compressor housing

. Around the perimeter insert leading pins to openings (6 pieces).

Check whether cap nuts are on oil pipes
slided to the internal space of the exhaust
system.

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GE PROPRIETARY INFORMATION P a g e | 24 2.34. Loosen the exhaust system with 4 forcing- off screws M6 at connecting screws in the length of the loosened nuts. Keep checking alignment of flanges and mobility of the PT (danger of damage of the blades of the power (free) turbine!).

Insert forcing

- o ff

screws M6 in six openings.

Conduct forcing off very slowly and carefully. The flanges must be aligned all the time. During forcing off keep checking mobility of
the P T. Check mobility of the Power

T urbine with hand inserted in
the exhaust nozzle . If the turbine gets stuck, the exhaust system must be returned to the original position where
movement still occurred and then keep on forcing off.

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GE PROPRIETARY INFORMATION P a g e | 25 2.35. After loosening the exhaust system, screw out the nuts on the remaining screws and keep forcing off to the end of threading of the forced- off screws while checking PT freeness and discharge pipe - 304.7 freeness.

2.36. With slight pull at exhaust bends, remove the exhaust system on the holder from the generator part before the stopper and stop . Disassemble forcing- of screws and leading pins.

Stop per on the bearing part of the exhaust
system

.

Disassemble forcing

- off screws and leading pins

from the exhaust system

.

Stop the “ slider ”
with the exhaust
system of the engine at the end of the holder using
screw on the front
holder.

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GE PROPRIETARY INFORMATION P a g e | 26 2.37. Catch the preparation with a crane, tighten the crane wire, remove the stopper on the bearing part of the engine halving preparation, release the “slider” and carefully remove the exhaust system from the holder. Cover the exhaust systém and store it in a convenient place with convenient conditions.

2.38. Check that the power (free) turbine blades bandage is not damage.

Fix the crane by the front holder. Remove the stopper from
the holder and release the “ slider ”. Then, remove the whole

exhaust system from the holder using the crane. A fter removal of the engine exhaust
system , check whether the power ( free ) turbine blad ing cover is not damage d or whether there are no
cuts on the turbine.

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GE PROPRIETARY INFORMATION P a g e | 27 2.39. Remove the cotter pin from the bearing and supporting part of the engine halving preparation and move away the bearing part so it does not obstruct further assembly.

2.40. Check that there is no spacer on the flange of the centrifugal compressor housing, that is inserted between the centrifugal compressor housing and the exhaust housing.

2.41. Secure the GT guide vane ring flange with the centrifugal compressor housing flange using four screws M5x12 CSN 02103.14 (including nuts and washers). Remove the spacer from the flange. This spacer does not have to be on the engine.

Fix the washer to the exhaust
system with lashing wire so it will not be forgotten during engine reassembly.

Technologically connect the

P T guide vane ring to the centrifugal compressor housing (at least 4 screws
crosswise).

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GE PROPRIETARY INFORMATION P a g e | 28 3. Disassembly of exhaust system

3.1. Unlock the lock washers 6,2 ONL 3288.2 on the reduction gearbox and exhaust system flange. Loosen and remove 34 nuts M6 ONL 3248 and M6 ČSN 02 1402.44 and washers

- 4063.4. Leave only 2 nuts on the sides of the reduction gearbox near the levelling marks. Remove all the brackets and holders.

Tools: unlocking pin, wrenches

3.2. Pose the exhaust system with the reduction gearbox on the top.

M6 ONL 3248

- 4063.4 M6 ČSN 02 1402.44

6,2 ONL 3288.2

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GE PROPRIETARY INFORMATION P a g e | 29 3.3. Prevent power turbine from rotating with tools 300-475

- 2024 and 300-557

- 0038.Loosen 8 nuts - 3041.5 using socket wrench 300- 313

- 3007 and remove lock washers - 3058.9. Keep the nuts on the plate 300- 745

- 7007 according to their numbers. Remove tool 300

- 475 -2024. Remove the power turbine using tools 100- 477

- 1004 and 100- 477- 1008.

Tools: Tools to prevent PT from rotating 300-475 -2024 and 300-557 -0038, socket wrench 300-
313 -3007, plate for the nuts 300-745 -7007, tools for power turbine removal 100-477 -1004 a 100-
477 -1008

- 3041.5 - 3041.5

- 3058.9 300

- 557

- 0038/02

300

- 745

- 7007 300

- 475

- 2024

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GE PROPRIETARY INFORMATION P a g e | 30 3.4. Unlock 12 lock washers 5,2 ONL 3288 and loosen 12 screws LN 5153 connecting bracket - 4512.5 and labyrinth seal - 4016.5. Then use 3 of these screws as jackscrews to disassemble bracket - 4512.5 from labyrinth seal - 4016.5.

Tools: unlocking pin, socket wrench

- 4512.5

Disassembled

screwsLN 5153 and
lock washers 5,2

ONL 3288.2 Holes for
jackscrews

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GE PROPRIETARY INFORMATION P a g e | 31 3.5. Loosen the last 2 nuts on the reduction gearbox and exhaust system flange. Remove exhaust system - 4.5 from support ring - 457.7 and reduction gearbox - 6.6 using tools 100- 477

- 1004 and
100

- 475- 20 55.

Tools: wrenches, tools for exhaust system removal 100-477 -1004 and 100-475-2005

100

- 477

- 1004

100

- 475

- 2055 - 4.5

- 6.6

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GE PROPRIETARY INFORMATION P a g e | 32 3.6. Remove insert - 659.9 and O- ring LN 5096 from PT shaft using tool 300- 475

- 2037.

Tools: tool for insert removal 300-475 -2037

- 659.9

LN 5096

300

- 475

- 2037

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GE PROPRIETARY INFORMATION P a g e | 33 3.7. Remove bolt - 6107.9 connecting PT shaft - 4004.7 and quilt shaft - 6172.5. Use tool 300- 475

- 2022 to prevent PT shaft from rotating. Then remove lock retaining ring - 6100.9 and ring - 6014.9.

Tools: special wrench 300-313 -9009,tool for PT shaft holding 300-475 -2022

300

- 313

- 9009 300

- 475

- 2022 - 6170.9

- 6100.9

- 6014.9

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GE PROPRIETARY INFORMATION P a g e | 34 3.8. Remove support cone with PT shaft - 403.7 from countershaft casing - 62.2 using 3 jackscrews
300

- 475- 2011. Force- off support cone carefully, equally around perimeter. When all the tubes are loose, remove the support cone. Pay attention to quilt shaft - 6172.5. It may get stuck in the PT shaft and then fall down. Remove bearing ring with rollers from quilt shaft - 6172.5.

Tools: jackscrews 300-475-2011

- 6172.5

Bearing ring with

rollers

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GE PROPRIETARY INFORMATION P a g e | 35 4. Disassembly of PT disc balancing plugs

Before balancing plugs drilling remove all PT blades.

4.1. Clean the contact surfaces of the power turbine disc and jig 200- 440

- 9067 by compressed air.

Contact surface - Jig 200-440-9067 Contact surface

– Power turbine disc

4.2. Set jig 200- 440

- 9067 on the drilling table and install the protective tubes on the guide pins of jig
200

- 440- 9067. Place the power turbine disc on the jig 200- 440

- 9067 and remove protective tubes.

Tools: jig 200-440 -9067, protective tube (part from 200-440 -9067)

Power turbine disc

Protective tubes

4.3. Install center drill number 400- 221

- 1023 into the drill chuck. Place the 1,5 mm Johanson gauge on the body of the disk, inside balancing flange (as per picture below). Touch the Johanson gauge with the drill and set up the drilling stoper on the drilling machine. After drill stopper is set up, remove the 1,5 mm Johanson gauge from the PT disk.

Tools: center dril 400-221-1023, Johanson gauge 1,5 mm Jig 200

- 440

- 9067

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GE PROPRIETARY INFORMATION P a g e | 36 CAUTION: PAY PARTICULAR ATTENTION TO THE DRILL STOPPER SET UP. IMPROPER SET UP COULD
RESULT IN PERMANENT DAMAGE TO THE CRITICAL PART, RESULTING IN THE PT DISK BEING

SCRAPPED

Johanson gauge Power turbine disc Center drill Setting drilling stopper

4.4. Place the drilling template on the PT disc and secure it with M6 nuts. Drill through the balancing plug with center drill 400- 221

- 1023 to the depth determined by the drilling stopper (which was set in op 3). After drilling, remove center drill 400- 221- 1023 from drill chuck, disassemble the M6 nuts and remove the drilling template. Remove all chips from PT and jig 200- 440

- 9067 with compressed air.

Tool s: drill template (part from 200-440 -9067), center dril 400-221 -1023

Drill template Power turbine disc Center drill M6 nut (2 pieces)

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GE PROPRIETARY INFORMATION P a g e | 37 4.5. Install the Ø3,25 mm drill into the the drill chuck. Place the 1,5 mm Johanson gauge on the body of the disk, inside balancing flange (as per picture below). Touch the Johanson gauge with the drill and set up the drilling stoper on the drilling machine. After drill stopper is set up, remove the 1,5 mm Johanson gauge from the PT disk.

Tools: drill Ø3,25 mm, Johanson gauge 1,5 mm

Drill Ø3,5 Johanson gauge Power turbine disc Setting drilling stopper

4.6. Place the drilling template on the PT disc and secure it with M6 nuts. Drill through the balancing plug with 3,25mm drill to the depth determined by the drilling stopper (which was set in op 5). After drilling, remove 3,25 mm drill from drill chuck, disassemble the M6 nuts and remove the drilling template. Remove all chips from PT disk and jig 200- 440

- 9067 with compressed air.

Tools: wrench=10

Drill template Power turbine disc Nut M6 (2x pieces ) Drill Ø3,5

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GE PROPRIETARY INFORMATION P a g e | 38 4.7. Insert protecting shim under the balancing plug. If the balancing plug is touching the disk body, the protecting shim is not required). Insert the Kraftwek 3057- 03 tool into the hole drilled in op 6, unscrew and remove balancing plug.

Tools: removing tool - Kraftwerk 3057-03, reamer holder, protecting shim (part from 200-440 -9067)

Power turbine disc Protecting shim

4.8. Put the protective shim below the balancing flange, and restore the balancing hole thread by using M5x0,5 4H5H thread drill placed in reamer holder.

Tools: thread drill M5x0,5 4H5H, reamer holder, protective shim

Reamer holder Thread dril Power turbine disc Protecting shim Kraftwerk

3057

- 03 Reamer

holder

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GE PROPRIETARY INFORMATION P a g e | 39 4.9. Check thread using M5x0,5 4H5H caliber and check surface under the balancing flange for any signs of damage. The damage is not permitted. Report any existing damage.

Tools: Caliber M5x0,5 4H5H

Caliber Power turbine disc

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GE PROPRIETARY INFORMATION P a g e | 40 5. PT disk inspection:

Inspection 1 # PT Disc inspection Instruction of the area below balancing plugs:

Note

– All balancing plugs need to be removed prior to area ‘A’ inspection
Perform Inspection of area ‘A’ (see Picture 1 below):
1. Visual Inspection

– perform visual inspection under the good lighting (min 1000 LUX) with the magnifying glass (5x magnification) of the disk body - area ‘A’ (see picture below) according to the criteria listed in table 1. Pay particular attention to the areas below balancing holes.

2. FPI Inspection

– perform the FPI inspection of the disk body (per GEAC instruction P34.39) - area ‘A’ (see Picture 1 below) according to the criteria listed in the table 1. Pay extra attention to the areas below balancing holes.

Picture 1

– Description of the required inspection area

Table 1 - PT Disc area ‘A’ inspection 1 acceptance criteria

Description Power Turbine Disc Part Number

M601

- 3220.6 M601

- 3220.5

Witness mark with no perceptible depth Replace, quarantine, repair being developed Accept as is

Dot indication
If not deeper than 0.05mm and diameter less than 0.1mm Replace, quarantine, repair being developed Accept as is

False drilled dimple
If depth is between 0.05mm to 0.08mm and diameter more than
0.1mm Replace, quarantine, repair being developed Replace, quarantine, repair being developed

False drilled dimple
Depth is more than 0.08mm Replace Replace

Linear FPI indication Replace Replace Pay extra attention in the areas below the balancing holes 

## Surface Area ‘A’
(highlighted in red)

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GE PROPRIETARY INFORMATION P a g e | 41 Inspection 2 # PT Disc inspection Instruction of the PT disc slot area:

Note

– All balancing plugs need to be removed prior to area ‘B’ inspection
Perform Inspection of area ‘B’ (see Picture 2 below):

1) Visual Inspection

– perform visual inspection under the good lighting (min 1000 LUX) with the magnifying glass (5x magnification) of the disk slot - area ‘B’ (see picture 2 below) according to the criteria listed in table 2. Pay particular attention to the areas at radius transition of the slot.

2) Dimensional Inspection

– perform dimensional inspection of the disk slot radii (R 1 and R 2 ) and slot diameter ‘diam_A’ (see picture 3 below) located in area ‘B’ (see picture 2 below) according to the criteria listed in table 2. Dimensional inspection of the R 1 , R 2 and ‘diam_A’ to be performed at 4 equally spaced places around the slot circumference (measurement to be taken every 90 deg)

3) FPI Inspection

– perform the FPI inspection of the disk slot (per GEAC instruction P34.39) - area ‘B’ (see picture 2 below) according to the criteria listed in table 2. Pay extra attention to the areas at radius transition of the slot

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GE PROPRIETARY INFORMATION P a g e | 42 Picture 2 - Description of the required inspection area

Picture 3 - Dimensions to be checked (R 1 , R 2 and ‘diam_A’) Pay extra attention in the areas marked below at radius transition of the slot 

## Surface Area ‘B’
(highli ghted in red)

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GE PROPRIETARY INFORMATION P a g e | 43 Table 2 - PT Disc area ‘B’ inspection 2 acceptance criteria

Description Power Turbine Disc Part Number

M601

- 3220.6 & .5 Surface imperfections / tooling marks Replace

Linear FPI indication Replace R1, R2 not equal to 1+/

- 0.2 mm Replace, quarantine, repair being developed Diam_A not equal to 45+/

- 0.2 mm Replace

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GE PROPRIETARY INFORMATION P a g e | 44 6. Assembly of balancing plugs

6.1. Balance according instruction M601

- P10- 31B. Fix PT rotor with blades in the balancing machine. Fasten thong and lock.
Tooling: balancing machine

6.2. Oil the bearings.
Tooling: balancing machine, oil

6.3. Plug in balancing machine to the computer. Choose button SYSTE M  SYSTEM DATA 
KONFIGURATION  GO TO

. Choose PEDESTALS RIGHT SIDE.
Tooling: balancing machine Fixation points

Oil the bearings

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GE PROPRIETARY INFORMATION P a g e | 45 6.4. Check if computer cable is pluged in the balancing machine.
Tooling: balancing machine

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GE PROPRIETARY INFORMATION P a g e | 46 6.5. Set

- up balancing machine program for balancing rotor PT with blades. Choose ROTOR DATA 
READJUSTMENT  PT DISK WITH BLADES.
Tooling: balancing machine

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GE PROPRIETARY INFORMATION P a g e | 47 6.6. Power on the balancing machine usage power on button.
Tooling: balancing machine

6.7. Keep rotation in range of green value as below.
Tooling: balancing machine Power on

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GE PROPRIETARY INFORMATION P a g e | 48 6.8. As soon as both surfaces are balanced (see indication location below), press HOLD button.
Tooling: balancing machine

6.9. Fill in initial inbalance mass status into assembly list. CAUTION! Surfaces in assembly list are rotated relatively to the display.
Tooling: balancing machine

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GE PROPRIETARY INFORMATION P a g e | 49

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GE PROPRIETARY INFORMATION P a g e | 50 6.10. Press CORR. Display indicate ideal location of balancing plugs in both surfaces. At first balance the surface with higher inbalance mass. Choose balancing plug weight according table. For I. Surface use balancing plugs - 3029.3 E

, - 3029.4 a -3032.4. For II. surface use - 3029.3 B

– D a -
3029.3 E

– F.
Tooling: balancing machine

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GE PROPRIETARY INFORMATION P a g e | 51 6.11. Fix PT rotor with blades in the stand.
Tooling: Stand

6.12. Fix outer bearing ring and cage of rollerbearing N1007 with ball bearing QJ206 usage rubber band

, so the bearing can ́t be damaged during balancing plugs locking.
Tooling: rubber band

6.13. Screw up balancing plugs on PT disk.
Tooling: screwdriver Bearing N1007

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GE PROPRIETARY INFORMATION P a g e | 52 - 3029.3 B, D, E, F Screwdriver

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GE PROPRIETARY INFORMATION P a g e | 53 6.14. Lock balancing plugs on PT disk usage locking thorn. Balancing plug can ́t be released anymore.
Tooling: locking thorn

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GE PROPRIETARY INFORMATION P a g e | 54 6.15. Screw up balancing plugs usage screwdriver. Long balancing plugs screw up on end stop, short ones have to be align with PT disk surface. Screwdriver grooves should point into the center of the disk.
Tooling: screwdriver

6.16. Lock balancing plugs on PT disk usage locking thorn and hammer. Balancing plug can ́t be released.
Tooling: locking thorn

6.17. White down in assembly list diagram assembled balancing plugs. Mark sawed- off balancing plug with X. Write down inbalance mass. Maximum inbalance mass according M601- P10- 31B. - 3029.3 E + H,

-
3029.4 or

- 3032.4

Locking thorn

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GE PROPRIETARY INFORMATION P a g e | 55 Balancing plugs location

Inbalance mass

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GE PROPRIETARY INFORMATION P a g e | 56 7. Assembly of the exhaust system

7.1. Put ring of the roller bearing on the quilt shaft - 6172.5. For easier assembly it is possible to “stick“ rollers to the quilt shaft with Vaseline. Put the quilt shaft - 6172.5 into the countershaft casing - 62.2. Marked teeth of the quilt shaft must fit to the marked teeth on countershaft gears.

Tools:

- 6172.5

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GE PROPRIETARY INFORMATION P a g e | 57 - 6172.5

- 63.6 - 62.2 - 6172.5

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GE PROPRIETARY INFORMATION P a g e | 58 7.2. Degrease contact surface of the support cone with PT shaft, complete - 403.7 and contact surface of countershaft casing - 62.2. Then apply Alhyl on those surfaces. Apply Vaseline on all the tubes and O-rings.

Tools: Vaseline, Alhyl

Degrease + apply
Alhyl vaseline

Degrease + apply Alhyl

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GE PROPRIETARY INFORMATION P a g e | 59 7.3. Put support cone with PT shaft complete - 403.7, on the reduction gearbox - 6.6. Mark on PT shaft - 4004.7 must fit between marked teeth of quilt shaft -6172.5.

Marks on the PT

shaft Marks on the
quilt shaft - 6172.5

- 457.7

- 4004.7 - 6.6

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GE PROPRIETARY INFORMATION P a g e | 60 7.4. Put ring - 6014.9, retaining ring - 6100.9 and bolt - 6170.9 into the PT shaft. Teeth on the lower side of the retaining ring must be rotated with 90° to the cut on the quilt shaft. Apply Molycote on the bolt - 6170.9.

Tools: Molycote

- 6172.5

Cut on the
quilt shaft

- 6170.9

- 6100.9

- 6014.9

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GE PROPRIETARY INFORMATION P a g e | 61 7.5. Put tool 300- 475

- 2022 to bolt - 6170.9. Cuts on the end of the tool must be rotated with 90° to the cuts on retaining ring - 6100.9. Tighten the bolt. First tighten the bolt unless all the parts are moving. Then slightly release, rotate with the rotating part of the tool, meanwhile tighten and release until it is obvious that the teeth are in the cuts. Hold the PT shaft with the tool to prevent its rotation. Tightening torque is 25 ±2 Nm . Because it is not possible to see if the teeth are in the cuts, make sure, that these parts were assembled properly. In other case repeat this section.

Tools: tool 300-475 -2022, torque wrench

- 6170.9

- 6100.9 otočná část 300

- 475

- 2022

300

- 475

- 2022

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GE PROPRIETARY INFORMATION P a g e | 62 7.6. Lock retaining ring - 6100.9 with tool 300

- 476

- 0018.

Tools: tool 300-476 -0018/01, hammer

D

D view

300

- 476

- 0018/01

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GE PROPRIETARY INFORMATION P a g e | 63 7.7. Put O-ring LN 5096 on insert - 659.9. Put insert - 659.9 into PT shaft - 4004.7. Apply Vaseline on the
O- ring. Side with the O- ring goes first. Hit the insert with tool Z3- 01197

- 00 and hammer. Clean the contact surface of PT shaft.

Tools: hammer, Vaseline, tool Z3-01197 -00

- 659.9

LN 5096

Z3

- 01197

- 00

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GE PROPRIETARY INFORMATION P a g e | 64 7.8. Check clearance V6/104 (0,25÷1 ,2) mm. Calculate it from the distance of the PT shaft contact surface and the surface of the insert. If the clearance is bigger, change the insert to meet proper values.

Tools: depth gauge

7.9. Put exhaust system - 4.5 on support cone - 457.7 and reduction gearbox - 6.6. Place the exhaust system with the sign “xxx” to the levelling mark. Apply Konkor 101 on bolts

- 4053.4, - 4065.4 and - 4066.4. Tighten at least 4 nuts on the reduction gearbox - 6.6 and exhaust system - 4.5 flange.

Tools: Konkor 101, spanner

7.10. Clean and degrease all contact surfaces of PT disc with blades. Cool PT disc to -18°C for 30 min. Clean and degrease all contact surfaces of bracket -4512.5. - 4.5

- 6.6 levelling mark center screw

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GE PROPRIETARY INFORMATION P a g e | 65 7.11. Put bracket - 4512.5 on labyrinth seal - 4016.5. Make sure that sign “xxx” is on the top of the engine. Apply Molycote into 12 holes of bracket - 4512.5 and also on threads on 12 screws LN 5153. Assemble screws LN 5153 and lock washers 5,2 ONL 3288.2. Tightening torque is (4 ÷ 5) Nm. Then lock washers 5,2 ONL 3288.2.

Tools: torque wrench, Molycote, locking pliers 300-312-2006

12x apply Molycote

5,2 ONL 3288.2 LN 5153 Sign of the top „xxx“

- 4512.5

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GE PROPRIETARY INFORMATION P a g e | 66 7.12. Warm up the center and the flange of PT shaft to the 80°C temperature using warming tool or warming pistol. Apply Molycote on the line between two diameters on the PT disc. Traces of Molycote are not allowed on contact surface. Press power turbine into the PT shaft using tool Z3-
01197- 00 a nd a hammer. The sign “xxx” must be on the top.

Tools: Molycote, hammer, tool for turbine pressing, warming tool

Warming tool

Z3

- 01197

- 00

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GE PROPRIETARY INFORMATION P a g e | 67 7.13. Put nuts - 3041.5 and lock washers - 3058.9 on screws - 3363.5. Firstly put the nut nr. 1 which is placed on the top (sign “xxx”). Other nuts put counter

- clockwise. Before assembly apply Molycote on threads and contact surfaces of the nuts. Tighten crosswise. Tightening torque is 8 Nm . Then let settle down temperature difference.

Tools: Molycote, torque wrench, plate for the nuts 300-745 -7007

- 3058.9

- 3041.5

300

- 745

- 7007

- 3041.5

- 3058.9

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GE PROPRIETARY INFORMATION P a g e | 68 7.14. Install tool for measurement of elongation of the screws. Prevent the turbine against rotating using fixing tool. Put the tip of the indicator on the end of the screw and chceck elongation values. Tighten the nuts twice to the 0,105 ÷ 0,110 elongation of the screws. Check if the screws shrink back. Final elongation must be 0,075 ÷ 0,080. Tighten crosswise. Tightening torque must be within (5 ÷ 15) Nm

. Tools: tool 300 -557 -0038/02, screwdriver, socket wrench 300-313 -7030,tool for turbine stabilizing
300 -475-2024

300

- 557

- 0038/02

300

- 475

- 2024

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GE PROPRIETARY INFORMATION P a g e | 69 7.15. After tightening the screws lock the washers with locking pliers. Then clean and degrease all the surfaces

Tools: locking pliers 300 -312-5005 300

- 557

- 0038/02

300

- 313

- 7030

300

- 312

- 5005

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GE PROPRIETARY INFORMATION P a g e | 70 7.16. Attach all the brackets and holders you removed during the exhaust system disassembly.on the flange of the reduction gearbox and exhaust system. Tighten all the nuts M6 ONL 3248 with washers - 4063.4 and nuts M6 ČSN 02 1402.44 with lock washers 6,2 ONL 3288 .2. Tightening torque is 4 +2 Nm. Then lock the washers.

Tools: wrench, locking pliers 300-312 -2006, torque wrench

M6 ONL 3248

- 4063.4 M6 ČSN 02 1402.44

6,2 ONL 3288.2

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GE PROPRIETARY INFORMATION P a g e | 71 8. Assembly

8.1. Bind lashing wire to cap nuts of the oil pressure pipes - 342.9 and oil drain pipes - 304.6, i.e. cap

nuts - 3006.9 and - 3007.9 for following pulling the nuts from the exhaust housing so that it has at least 250 mm. At M601D also bind the lashing wire to the bushing from the thermocouples.

8.2. Disassemble the sealing from the lateral flange and one exhaust nozzle. Clean the contact surfaces of the flanges from the exhaust system of the engine. Check placing of the piston ring (position of the lock is arbitrary) by pulling a piece of paper under the piston ring. The paper will show the clearance between the ring and its flange. Cut overlapping paper with a razorblade. Bind lashing wire to the cap nuts (or thermocouple bushing). Due to the

wire , you will be able to pull the nuts through the exhaust housing , after connecting the exhaust system to the generator.

Correct placing of the piston ring is achieved by inserti ng the piece of paper under the piston ring. Subsequently cut the paper

.

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GE PROPRIETARY INFORMATION P a g e | 72 8.3. Attach the front holder of the engine halving preparation connected to the exhaust systém to the crane and slide it carefully on the bearing part of the engine halving preparation fixed on the aircraft. After that, stop the “slider” and insert a stopper to the end of the bearing part of the preparation before loosening the crane. Then remove the crane hook.

Stop the “ sl ider”
with the exhaust system on the holder using screw. Insert stopper on the bearing part
of the exhaust
system. Fix the crane using the front
holder.

After mounting the
exhaust system of the engine to the bearing part of the engine halving preparation, disconnect the crane and prepare leading needles (6 pieces around the perimeter). Stopper

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GE PROPRIETARY INFORMATION P a g e | 73 8.4. Disassemble technological screws from the GT guide vane ring flange and centrifugal compressor case flange and release the “rider” and move the outtake system so that it is possible to pull through lashing wires connected to cap nuts - 3006.9 and - 3007.9 through the exhaust case coat in the appropriate places (at M601D, pull the wire through from the thermocouple bushing). Then slide the outtake system to the position where the centring needles touch the front of the PT guide vane ring flange. In this position, check and adjust, if necessary, evenness of flanges, insert around the perimeter in the openings other six leading needles, then mount centring needles in the relevant openings in flanges of the PT guide vane ring and the centrifugal compressor case. Slide the outtake system even further so that the space between the flanges is 20 mm in maximum, in this position, check again alignment of flanges, if necessary, set with screw No. 1 on the preparation. Screw No. 2 must be free, during approximation keep checking with your hand the mobility of the power (free) turbine. After securing the correct position, lightly move the outtake system to the PT guide vane ring flange and secure it with at least 6 screws with applied Molyka. Cap nuts of oil pipes - 3006.9 and - 3007.9 pull through the coat of the exhaust case. CAREFUL: do not forget to insert the washer between the exhaust case and flange of the PT guide vane ring if it was part of the engine. Check evenness even from the side (not only height- se), if necessary, press the coat of the outtake system to the relevant side.

If washer was part of the engine,
it must be reassembled. Check mobility of the PT turbine with your
hand inserted in the
exhaust. If the turbine gets stuck, the system
must be returned to the position where it moved, and then continue in bearing on, or adjust the position. Pull the cap nuts wires through the relevant openings. Conduct bearing on very slowly and carefully. The flanges must be completely even all the time. Keep checking the mobility of the PT
turbine. Make sure the nut
does not
prevent sliding.

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GE PROPRIETARY INFORMATION P a g e | 74 8.5. Add number of other screws to the flange (in particular short ones, do not forget to rub them in
Mo lyka) and disassemble the engine halving preparation from the engine. This includes the “rider”, the bearing and supporting part of the preparation and also the reduction gearbox holder, the other part with centering needles and the third part (while disassembling the third part, replace the pins of the preparation with pins of the engine bed progressively, the engine bed needles with crown secure with cotter pin.) Add screws and nuts to the longitudinal parting flange of the exhaust case at the openings from disassembled parts of the preparation.

Disassemble all parts of the enging halving preparation and

store them in the case. Disassemble the second part of the preparation with centring needles from the top and bottom
part.

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GE PROPRIETARY INFORMATION P a g e | 75 8.6. Connect the flanges of the centrifugal compressor case and the outtake system using 41 screws

- 3007.7, 19 screws - 8019.7 (rub them in Molyka) and 60 self- locking nuts - 3009.4 (numbers of long and short screws may differ, long screws are where a holder is connected under the nut). In the 10th opening ( counted from the top connection of the outtake system clockwise, “in the direction of the flight” ) insert screw - 8019.7 and under the screw Ø 5.3 also holder - 8015.6 (slightly turned to the top of the engine). Insert holders of the front partition under the nut of 5th, 15th and 25th screw, also insert and use screws - 8019.7. At positions 11 and 12, insert the holder of the fire detector under the nuts (if assembled).
To openings 2, 8, 14, 20 and 26 (right half of the engine), also insert screws - 8019.7, connect the holders of the thermocouple collector under the nuts on these screws. To openings 3, 4, 6, 7, 8, 16, and 26 ( counted from the bottom connection of the outtake system clockwise ) insert - 8019.7. Under the nuts of screws 3 and 4, insert the top part of the holder - 839.8, at screw 6 and 7, insert the top part of the holder - 840.8 under the nut. Under the nut of screw 5, 15 and 25, insert the holders of the front firewall - 8044.6. Under nuts 9, 16 and 26, connect the thermocouple collectors. On position 25 and 26, insert the holder of fire detector (if assembled). Tighten the nuts crosswise to 6 Nm.

Screws with nuts under which the thermocouple
collectors are connected.

Screws with nuts under
which the holders of
the front firewall are connected.

Screws with nuts under
which the fire detector
holder are connected.

Screws with nuts under which the top parts of
the holders

- 839.8 and

- 840.8 are connected

– assemble by oil pipes.

Screw with nut under
which the holder

- 8015.6 is connected. P L 2. 8.

.

14.

20.

26. 9.

. 16. 26.

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GE PROPRIETARY INFORMATION P a g e | 76 8.7. Measure individual thermocouples and check their state. (no clearance, nut must be tightened).

8.8. To nine flanges on the exhaust case progressively insert 9 thermocouple transmitters (does not apply to M601D). Each thermocouple must go to the same place from which it was removed, their position is marked according to 1.22. Before tightening check whether each transmitter sits well in the flange, then tighten it with 2 screws LN 5135 (rub the screw screwing in the mixture of molybdenum sulphide and oil), insert lock washers 5.2 ONL 3288.2 under the screw heads, secure the screws after tightening. After assembly, check each thermocouple transmitter for damage on the electrical circuit with 4.5V ohmmeter. Test the thermocouple transmitters with “A” pole towards the reduction gearbox.

8.9. Connect to the exhaust case flange thermocouple transmitter bus. According to the sketch on sheet 63. Before the bus platform is fixed, according to the need, release its inconvenient distortion with hand so that individual wires to be tightened and connected to individual poles of the thermocouple transmitters are not under extreme pressure, distorted, crossed, slacking, etc.

To the flanges on the exhaust

case , insert 9 thermocouple
transmitters. Before tightening, try to centre the thermocouple transmitters.

Thermocouple transmitters position
with “A” pole facing the

reduc tion gearbox

. After tightening of the screws, secure the lock
washers.

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GE PROPRIETARY INFORMATION P a g e | 77 8.10. Assemble cables to the thermocouple transmitters. Connect cables with read heads to „Ch“ pole and the ones with green heads to „A“ pole. To connect the green head, use the LN 5444 screw and LN 5168 self- locking nut. To connect the read head, use the LN 5084 screw and the LN 5167 self- locking nut. Position the cable heads to be almost horizontal with the exhaust case and to be oriented anti- clockwise (viewing from the direction of flight). The only exception is the connection of two thermocouple transmitters, where in one case, the cable heads are oriented to the front partition (at the thermocouple transmitter located next to the flange for intake of cooling air of the GT oil collector cover) and in the other thermocouple transmitter, the cables are oriented clockwise (the lowest thermocouple transmitter on the left side of the exhaust case). While connecting the wires to the thermocouple transmitter poles, make sure the wires are not torn, partially broken, crossed (i.e. damaged) and that the outlet thermocouple contacts are not damaged

– bent

– during assembly. During tightening, hold the screws, then secure them and place the wire eyes under the screw heads. After assembly, check insulation resistance of the whole thermocouple set with MEGMET 100 Vss device

– the insulation resistance must amount to at least 5Ω. The rubber inserts of the holder can be put together from two parts, in certain strongly bandaged places of the platform, holder insert cannot be used. During assembly of the cable platform, maintain the distance of the cable outlets from the pipes (at least 5mm), at the platform, contact of braid and pipes is allowed. The screws are inserted to the thermocouple transmitters poles from the accessory gearbox, at the transmitter on the left side, they are inserted from top to bottom, and at the transmitter thermocouples (the bottom one on the left), they are inserted from the reduction gearbox.

On the left side of the engine, there are two thermocouple transmitters

– exceptionally positioned this way.

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GE PROPRIETARY INFORMATION P a g e | 78 8.11. At the exhaust case opening (pressure oil intake), take out the oil pipe cap nut using the lashing wire (or hook) through the sealing connection. Using the cap nut on the oil intake pipe, connect the pressure oil bushing -829.9, the bushing must be oriented for subsequent connection of the pressure oil pipe to GT. Insert sealing ring Js 4 - 8056.9 to the ONL connections. Glue the ring to the bushing using vaseline, assemble the bushing and then remove it and check that the ring did

not move.

8.12. At the opening in the exhaust case (oil discharge), take out the oil pipe cap nut using lashing wire (or hook) through the sealing connection. Using cap nut, connect the pressure oil bushing - 8030.9 to the oil discharge pipe. Using cap nut, assemble the bushing to the oil discharge pipe and secure the cap nut. Insert sealing ring Js 8 - 8058.9 to ONL connections. Insert seali ng rings to ONL connections. CAREFUL: you must be absolutely sure that the ring did not move and does not prevent oil flow or cause pipe leakage.

Connect bushing using
cap nut. Insert sealing rings to ONL

connections. CAREFUL: you must be absolutely sure that the ring did not
move and does not prevent oil flow or cause pipe leakage.

Connect the bushing using cap nut with discharge pipe and secure
both

. Connect the bushing using cap nut.

Apply Moly ka to the bushing threading.

Apply Molyka to the bushing threading.

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GE PROPRIETARY INFORMATION P a g e | 79 8.13. To the hollow screw of the drain pipe LN 6169, insert sealing ring (Cu) 10x14 CSN 02 9310 and slide it through the discharge pipe - 806.7, then mount another sealing ring on the screw and screw it to the flange threading on the bottom of the exhaust case. Secure the screw with lashing wire. Before assembly, apply Molyka to the hollow nut threading.

8.14. Slide cover - 8048.8 on the torqumeter pipe - 840.9. Connect the torquemeter pipe to the pipe - 841.6 using cap nut. Tighten the nut and secure with lashing wire. Then mount the sealing - 8060.8 (2 pieces) and rubber insert - 8061.8 to the pipe. Fix the sealing and rubber insert to the front firewall using covers - 8048.8, fix the covers to the firewall with 2 screws LN 5084, washers LN 5156 and nuts LN 5167.

Before assembly, place

- 8048.8 cover

, - 8060.8 sealing and rubber

insert

- 8061.8 on the pipe. After connecting the pipe, tighten both covers on the
front firewall

. Secure cap nut after tightening with lashing wire. Insert hollow screw through the drain pipe and fix it to the
exhaust case threading. On both sides of the pipe (on the screw), sealing rings (Cu) must be placed. After tightening, secure the screw with lashing

wire.

Sealing rings (Cu) 10x14 CSN 02 9310

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GE PROPRIETARY INFORMATION P a g e | 80 8.15. Check O rings LN 5161 (2ks) and LN 5162 (2ks), which are on pipes - 826.6 a - 827.6, or replace if

necessary.

8.16. At the pressure oil pipe -826.6, clean the contact surfaces (on the side of the pipe to face the reduction gearbox) and apply a thin layer of Hylomar. Apply vaseline to the other end with the O ring. Then, insert the pipe to the cover - 8048.8 and put pipes through the opening in the fornt firewall and insert the second cover. Insert one end to the accessory gearbox and the other to reduction gearbox. Insert sealing - 8052.8 on pipe - 826.6, insert cover - 8053.8, sealing - 8052.8 and fix the covers to the partition with screws LN 5084, nuts LN 5167 and washers LN 5165.

8.17. To the reduction gearbox, fix a pipe with two M5 CSN 021401.44 nuts, insert lock washers 5.2 LMN 3290 under the nuts.

8.18. Insert a washer on pipe - 826.6 and fix the pipe to the flange of the exhaust case and centrifugal compressor case. Fix the bottom part of the holder -840.8 to the pipe and both parts of the holder with inserted rubber washer connect with 2 screws LN 5178 and self- locking nuts LN 5168.

8.19. Assemble the pressure oil pipe to GT - 839.6 using cap nuts to the pipe - 826.6 and pressure oil bushings - 827.9 and secure with lashing wire. On both ends, insert sealing rings Js 4 - 8056.9 to ONL connections.

8.20. To the pipe sucking oil from the reduction gearbox - 827.6, insert a cover - 8054.6 and insert - 8055.6 and covers connect similarly as in 4.41. Insert one end to the driver box and the other to the reducer box. Before assembly, coat on the side the contact surface of the pipe flange in Hylomar, and apply a thin layer of vaseline to the other end with O ring. Fix the pipe to the reduction gearbox with two nuts MS CSN 02 1401.44, insert lock washers 5.2 LMN 3290 under the the nuts.

Apply a thin layer of v aseline on the end of pipes with the O ring and put them in the

accessory gear box

. Before pulling pipes through the front firewall , slide a cover on them, as well as after pulling, before storing the pipe in the accessory gear box.

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GE PROPRIETARY INFORMATION P a g e | 81 8.21. Slide insert on the pipe -827.6 and fix the pipe to the holder on the flange of the exhaust case and to the centrifugal compressor case using the bottom part of the holder - 839.8, screw LN 5190 and nut LN 5168 (a rubber washer is inserted in the holder). Put sealing -827.6 on the pipe.

Tighten the covers

- 8048.8

- 8049.8 with sealings and
inserts on the front firewall

. According to 5

. 44

, assemble the pipe

- 839.6 and secure. On both ends, insert

to ONL conections sealing rings Js 4

- 8056.9

Clean contact surfaces and apply thin layer of Hylomar ( only the cap
part ).

Fix pipes to the flange of the
exhaust case and centrifugal

compressor case with holders. Between covers,

insert sealing

- 8052.8 (for pipe

- 826.6) or
8054.9 (for

- 827.9)
and rubber washers

- 8053.8 (for

- 826.6) or

8055.6 on the front
firewall.

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GE PROPRIETARY INFORMATION P a g e | 82 8.22. In the flange of the exhaust case, insert air intake pipe - 880.8. Apply ALHYL paste on the flange on the exhaust case before assembling the air pipe for sealing.

Apply ALHYL paste to the
contact surfaces from both
sides.

Insert the pipe in the opening
on the exhaust case . Make sure the pipe is in the right position. “XXX” marking must face the
reduc tion gearbox

. Apply ALHYL paste to the

exhaust case flange.

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GE PROPRIETARY INFORMATION P a g e | 83 8.23. To the inflate pipe - 828.7, slide cover - 8048.8 from the side with O ring, slide the pipe through the opening in the front firewall and slide on the other cover - 8048.7. Apply thin layer of MOGUL LV 2- 3 vaseline to the side of the pipe with the O ring LN 5295 (or other tested vaseline, e.g. vacuum one) and insert it to the connection of the air outtake pipe - 108.7 and secure them. Connect the other end of the pipe to the exhaust case flange using screws ONL 3282.2 and secure them. Seal all contact surfaces of the flange and sealing with ALHYL paste. Then assemble the inflate pipe - 828.7 with the labyrinth inflate pipe PT - 861.9 using cap nut, and secure the nut with lashing wire after tightening. Then, insert, between sealing covers - 8005.7, rubber insert - 8006.7 and sealing - 8005.7 on the inflate pipe - 828.7 and fix them in the opening in the front firewall with covers using LN 5084 nuts and LN 5167 nuts. Insert washers LN 5165 under the nuts.

Slide the end of the
pipe with O ring to
the air discharge
pipe. Apply thin layer

of v aseline to the
ring. Apply ALHYL
paste to the pipe

contact surface

.

After tightening the screws,

secure lock washers. Then

connect the P T labyrinth inflate
pipe using cap nut, and secure
the nut with lashing wire.

Insert sealing

covered in ALHYL
paste between
the inflate pipe

and the air
intake pipe. Between covers in the front firewall,
insert rubber sealing washer and
tighten the cover screws.

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GE PROPRIETARY INFORMATION P a g e | 84 8.24. On the top part of the exhaust case, mount to 3 - 4055.4 screws the front holder (cable platform) - 848.6 (screws to position 2, 11 20 from the reduction gearbox flange).

Assemble the front holder

- 848.6 (cable platform) to three

screws

- 4055.4 with relevant self

- locking nuts

- 3009.4.

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GE PROPRIETARY INFORMATION P a g e | 85 8.25. Connect electrical installation and fire detector (if assembled) cables to the front holder - 848.6 (to the cable platform).

8.26. Loosen the pipe to EHO -846.9 (if assembled along with EHO) from the propeller governor and electrohydraulical actuator screwing and slide electrical installation cable with the propeller heating bus under it. Then reassemble the pipe, tighten and secure cap nut with lashing wire on the side of the propeller governor and hollow screw on the side of electrohydraulic actuator (at versions with propeller heating).

Release the pipe to EHO, slide the propeller heating bus cable under
it and reassemble the pipe. Tighten and secure with lashing wire the cap nut on the propeller governor side
and the hollow screw on the electrohydraulic

actuator side. Connect cables to the front holder (cable platform) using
three connectors.

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GE PROPRIETARY INFORMATION P a g e | 86 8.27. To the reduction gearbox flange, assemble, to position 3 and 4 to the left clockwise from the centering screw fire detector (if assembled) using two self- locking nuts M6 ONL 3248, and insert washers LN 5275 under them. Fix the cable with holder to the reduction gearbox flange to position 1.

8.28. Lead the cable to the revolution indicator transmitter. At engines with EKO, lead it along it and fix it by holders and two longer screws (under two nuts M6 CSN 02 1402.44 with lock washers 6.2 LMN 2390) of electrohydraulic actuator. At engines without EHO, fix the cable to the reduction gearbox flange on position 1 to the right next to the centring screw and to two screws (under nuts M6 CSN 02 1402.44 with lock washers 6.2 LMN 3290). Insert the plug to the revolution indicator transmitter, tighten and securing with lashing wire. Secure lock washers. Assemble fire detector including the holder to position 3 and 4 using two self

- locking nuts M6
and washers LN 5275.

Fix the detector cable to
the reduc tion gearbox flange to position 1. Centring screw

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GE PROPRIETARY INFORMATION P a g e | 87 8.29. If electrohydraulic actuator is part of the engine, insert to it the relevant connector (plug), tighten and secure with lashing wire.

8.30. Lead the electrical installation cable to the propeller governor and electromagnetic signaller of chips (or to the ELM switch). If EHO is part of the engine, lead the cable along the pipe to EHO - 864.9 (two holders). If EHO is not part of the engine, connect the cable to screw 9 on the reduction gearbox flange from the centring screw. Or assemble the cable according to the original assembly. Secure the connector with lashing wire from the drilled flange through cap nut to the connector

screws. Insert the connector to the electrohydraulic actuator

.

Lead the cable along the pipe to

EHO

- 864.9 to the propeller

governor flange.

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GE PROPRIETARY INFORMATION P a g e | 88 8.31. Assemble the pipe of the feathering pump - 818.6 (if it was assembled). On it, slide the cover sheet

- 8048.8, sealing - 8058.8 and rubber insert - 8059.8 and slide it through the front firewall. Then slide on the cover sheet from the other side and fix and tighten cap nuts on both sides of the pipe and secure with lashing wire. To make the subsequent assembly of electrical installation of the magnetic signaller and propeller governor easier, slide the relevant cables between the reduction gearbox case and the feathering pump pipe.

F ix the feathering pump pipe

- 818.6 and secure with lashing wire. Before fixing the pipe, slide the
electrical installation cable under it. Fix the cable to the pipe. Vložte zde z každé
strany stavitelné
přípojky těsnící
kroužky 14x20 ČSN 02 9310.3. Kabel připevněte
ještě před
instalací trubky

k EHO

- 864.9

Slide cover sheet

- 8048.8, sealing and rubber insert on it and slide it through the front firewall

, then insert cover sheet from the other side. After fixing the pipe tighten the covers. Front firewall

Rear firewall

Sealing (

- 8058.8)

Rubber insert (

- 8059.8)

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GE PROPRIETARY INFORMATION P a g e | 89 8.32. Connect the connector to the ELM switch and secure with lashing wire. If ELM is part of the engine.

8.33. Assemble the control rod of the propeller governor to the reduction gearbox flange with holder and two nuts M6 CSN 02 1402.44 with lock washers 6.2 ONL 3288.1. Secure the nuts (if such kind of control is assembled). Connect the
connector to the
ELM switch. Secure
the connector with lashing wire.

Fix the cable to the propeller governor

.

Assemble the control rod
to the reduc tion gear box flange using 2 M6 nuts
with lock washers. Secure
the nuts.

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GE PROPRIETARY INFORMATION P a g e | 90 8.34. Electrical installation cable attach to the feathering pump pipe - 818.6, or as it was attached originally. Then connect, tighten and secure the plug to the propeller governor. Or connect and tighten plug ELM (if it is part of the engine).

8.35. Fix the remaining cable to the filter screw - 615.4 according to the picture and then connect and secure the electromagnetic signaller of chips.

Attach the cable to the feathering pump pipe (according to the version, if not already done pursuant to 4.57). Connect plug to the propeller

governor and secure it with lashing wire against loosening.

Connect the cable to the
filter screw

- 615.4 (can
be connected to the
other screw).

Connect and secure the electromagnetic signaller of chips.

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GE PROPRIETARY INFORMATION P a g e | 91 8.36. Disassemble propeller regulator control device.

8.36.1. Connect the control case - 731.4 to the holder on the outtake set using to LN 5289 screws. Fix the case so that the holder of the outtake box is under the screw heads, then there is insulation - 7114.4, then case holder, insulation - 7114.4 and - 7036.7 liner. Tighten the screws using nuts M5 CSN 02 1401.44, insert lock washers 5.2 ONL 3288.2 under them (see scheme below). Apply thin layer of mixture of molybdenum sulphide and oil (Molyka) to the screw threading. Insert the holder from the torquemeter pipe under the bottom nut with lock washer (at M601E versions).

8.36.2. Connect connecting eye- bending shafts of kinetic connection - 703.9 to the double- lever (double- lever pin) using crown nut - 7142.4 and cotter pin LN 5009, and secure it.

8.36.3. Connect control rod of the propeller regulator to the propeer regulator using pin, washer and cotter pin, and secure it.

8.36.2

8.36.1

Between the
screw head and insulation,
exhaust case
holder is located. Control case
holder Pertinax
insulation Liner

8.36.3

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GE PROPRIETARY INFORMATION P a g e | 92 8.37. Assemble the water extinguishing platform, secure the cap nuts with lashing wire (if assembled).

8.38. Check the completeness of the engine.

8.39. Assemble propeller and bonnet.

8.40. Add oil to the engine, discharge air from the oil system. Record the executed work in the engine log book.

8.41. Verification of the engine function execute with engine test according to the “Manual for technical operation”, part 72.03.00 (apart from points 7 and 11) including test flight. Assemble the platform
to the front firewall and the extinguishing pipe using cap nuts. Secure the nuts with lashing

wire. Assemble the platform to the
holder of the fire
detector. Assemble the platform to the flange of the reduc tion gearbox using the holders on both sides. 2x2 pieces of M6 nuts and lock
washers 6.2 ONL 3290.

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GE PROPRIETARY INFORMATION P a g e | 93 9. Verification of the engine function
Execute verification of the engine function by the engine perfomance test and measure
the Power Turbine and Gas Generator Turbine engine vibration on the wing, according to appropriate engine model Maintenance Manual, chp. 70.01.01 and compare with measurement in pharagrph 1.

Record the maximum and minimum values of spline wear for quill shaft and the PT shaft into the engine log book.

10. MATERIAL INFORMATION

10.1. Material Required

Code Name Drawing No. Amount
019

- 0 -T074302 Lock washer 5.2 ONL 3288.2 150 pieces
019

- 0 -T055174 Screw

– GT distributor M601- 3632.7 A 2 pieces
019

- 0 -T055175 Screw

– GT distributor M601- 3632.7 B 2 pieces
019

- 0 -T055176 Screw

– GT distributor M601- 3632.7 C 2 pieces
019

- 0 -T055177 Screw

– GT distributor M601- 3632.7 D 2 pieces
019

- 0 -T055019 Safety

– GT nut M601- 3048.4 20 pieces
019

- 0 -T071594 Nut M6

– exhausts LN 5281 16 pieces
019

- 0 -T074303 Lock washer, exhausts 6.2 ONL 3288.2 25 pieces
019

- 0 -T072897 Screw LN 5135 25 pieces
019

- 0 -T074622 Sealing ring 10x14- copper CSN 02 9310.2 4 pieces
019

- 0 -T065439 Sealing ring, d4 Js- 4 M601- 8056.9 10 pieces
019

- 0 -T065441 Sealing ring, d8 Js- 8 M601- 8056.9 10 pieces
019

- 0 -T065440 Sealing ring, d6 Js- 6 M601- 8056.9 2 pieces
019

- 0 -T065052 Insert

– oil pipe M601- 8072.8 1 piece
019

- 0 -T065055 Insert

– oil pipe M60 1- 8073.8 1 piece
019

- 0 -T071517 Nut M5 LN 5250 45 pieces
019

- 0 -T071518 Nut M5 LN 5251 2 pieces
019

- 0 -T055042 Screw M 4x6 M601- 3004.3 12 pieces
019

- 0 -T055183 Stud M601- 3061.7 A- B 2 pieces
019

- 0 -T55184 Stud

– lab long M601- 3061.7 A- B 2 pieces
019

- 0 -T55126 Stud

– lab short M601- 3061.7 A- B 1 piece
019

- 0 -T74360 Lock washer 4.2 LMN 3290 4 pieces
019

- 0 -T74361 Lock washer 5.2 LMN 3290 15 pieces
019

- 0 -T74362 Centering screw 6.2 LMN 3290 10 pieces
019

- 0 -T57005 Centering screw M601- 4054.4 2 pieces
019

- 0 -T57016 Screw M601- 4054.4P 2 pieces
019

- 0 -T57006 Washer

– reducer M601- 4055.4 4 pieces
019

- 0 -T75874 Nut M6 LN 5275 4 pieces
019

- 0 -T70064 Washer

– roller CSN 02 1402.44 5 pieces
019

- 0 -T57007 Washer 14x18

– Al M601- 4062.4 1 piece
019

- 0 -T74644 Safety

– detector CSN 02 9310.3 1 piece
019

- 0 -T75878 Screw

– air outtake LN 5333 8 pieces
019

- 0 -T72994 Stud LN 5410 4 pieces
019

- 0 -T54031 Stud M601- 2004.44A 2 pieces
019

- 0 -T54032 Insulation (pertinax) M601- 2004.4B 2 pieces

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GE PROPRIETARY INFORMATION P a g e | 94 019

- 0 -T64012 Sealing M601- 7114.4 2 pieces
019

- 0 -T65425 Sealing M601- 8005.7 2 pieces
019

- 0 -T65120 Sealing M601- 8052.8 2 pieces
019

- 0 -T65122 Sealing M601- 8058.8 4 pieces
019

- 0 -T65126 Sealing M601- 8060.8 4 pieces
019

- 0 -T65128 Screw M4

– partition LN 5084 20 pieces
019

- 0 -T73012 Washer d4 LN 5165 20 pieces
019

- 0 -T75807 Self- locking nut M4 LN 5167 20 pieces
019

- 0 -T71576 Screw M5x22 LN 5289 2 pieces
019

- 0 -T73030 Self- locking nut M5 LN 5168 10 pieces
019

- 0 -T71577 Screw

– pipes sleeve LN 5190 4 pieces
019

- 0 -T73020 Screw M 5x8 M601- 3005.3 4 pieces
019

- 0 -0392099 Self- locking nut M5 M601- 3009.4 40 pieces
019

- 0 -0898005 Sealing M601- 3010.3 2 pieces
019

- 0 -0360535 Sealing M601- 3012.3 2 pieces
019

- 0 -0360536 Sealing M601- 1010.6 2 pieces
019

- 0 -0360620 O sealing ring

– core LN 5120 2 pieces
019

- 0 -0899850 O sealing ring - core LN 5341 2 pieces
019

- 0 -0360727 O sealing ring LN 5096 2 pieces
019

- 0 -0360513 O sealing ring LN 5161 2 pieces
019

- 0 -0360641 O sealing ring LN 5162 2 pieces
019

- 0 -0360642 O sealing ring 13x2 LN 5272 1 piece
019

- 0 -0900261 O sealing ring M601- 6147.4 1 piece
019

- 0 -0900277 Sealing ring LN 5299 1 piece
019

- 0 -0360673 Sealing ring

– oil filter LN 5301 1 piece
019

- 0 -0360675 Sealing

– intake pipe M601- 8082.8 2 pieces
019

- 0 -0360599 Sealing

– sheet M601- 2534.5 6 pieces
019

- 0 -0360621 Screw M6

– exhausts M601- 4556.6 16 pieces
019

- 0 -0898011 Screw

– parting plane, short M601- 3007.7 25 pieces
019

- 0 -0898014 Screw

– parting plane, long M601- 8019.7 10 pieces
019

- 0 -0909233 Self- locking nut M6 ONL 3248 4 pieces
019

- 0 -0401731 Countersunk screw shell M3x10 CSN 02 1151.22 4 pieces
019

- 0 -0411546 Control cotter pin LN 5209 10 pieces

10.2. List of auxiliary material

Name Code Amount Benzine 0116103
Acetone 0357298 Aero shell grease NR.6 0116459 Molyka 0116601 Hylomar Varnish S2321/1000
Brush 0965412 Loctite 243 0353232 Technical patch 0975142 Wire KR 0,63 L- AKVS lashing 0226705 Wire KR 0,8 1CH18N9T lashing 0227031 Wire KR 05 42 3213.11 lashing 0289793 Alhyl paste

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GE PROPRIETARY INFORMATION P a g e | 95 Steel brush Lapping paper
Tent canvas 1m2 Galloon white 5m Rubbers 6 pcs

10.3. Tooling

Disassembly

300

- 475

- 2024 přípravek proti otáčení PT
300

- 557

- 0038/02 přípravek proti otáčení PT + držák hodinek

300

- 745

- 7007 podložka na matice PT
100

- 477

- 1004 přípravek na demontáž kola PT
100

- 475

- 2055 přípravek na demontáž skříně výstupu

100

- 477

- 1008 přípravek na demontáž kola PT
300

- 475

- 2088 přípravek na demontáž vložky hřídele PT
300

- 475

- 2022 přípravek na přídržení hřídele PT

300

- 313

- 3027 přípravek na demontáž šroubu

z torz.
300

- 475

- 2012/01 odtlačovací šrouby 3x

300

- 476

- 0122 přípravek na demontáž torz. Hřídele

Assembly

300

- 346

- 3002 přípravek na montáž vložky hřídele PT
300

- 313

- 9009 přípravek na utažení šroubu torzní hřídele

300

- 476

- 0018/01 přípravek na zajištění šroubu TH

300

- 313

- 7030 klíč na matice PT

setinové hodinky
hloubkoměr nástrčný klíč s

- 10 záslepka na regulátor vrtule