### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 1 

# Alert Service Bulletin Appendix 2:

M601 Reduction Gearbox and Supporting
Cone Inspection procedure

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page 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.

2. Disassembly

2.1. Disassemble the bonnet and propeller from the engine

2.2. Close the bleed 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

a ssemble preparation -9020.7. After release of oil from accessory gearbox, put

b ack the magnetic plug and secure it. Close the bleed 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 3 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.

2. After disconnecting the

rod from the governor

, disassemble it together

with holder from the

reduc tion gearbox flange.
2 pieces of M6 nuts.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 4 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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 5 2.7. Disassemble the control device of the propeller governor. 1.7.1 Unlock and loosen nut -7142.4, fixing the eye-bending shafts of kinetic

lin k - 703.9 to the double-lever, remove the eye from the double-lever pin (pin

o n the shorter arm of the double-lever).

1.7. 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

fro m the flange.

1.7 .1

. 1. 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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 6 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 electric 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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 7 2.10. Disassemble the front holder -848.6 of the electric installation on the top

con nection of the exhaust housing fixed with 3 screws.

2.11. Disassemble the air sealing pipe -828.7 from the flange on the exhaust

h ousing, the air sealing pipe of the PT labyrinth -861.9 from the bulkhead and

fro m 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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 8 2.12. Remove the air sealing pipe -880.9 and its sealing from the exhaust housing

fl ange.

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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 9 2.13. Disassemble the pressure oil pipe to GT 839.6 from the pressure oil pipe -826.6

a nd 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. 1.13

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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 10 2.16. Disassemble the pressure oil bushing by loosening cap nut -3006.9 from the oil

in take pipe 343.9. Push the cap nut -3006.9 along the pipe -343.9 to the

exh aust housing.

2.17. Disconnect the torquemeter pipe -840.6 from the pipe -841.6. Remove the

cov ers, 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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 11 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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 12 2.20. Disassemble the scavenge oil bushing -8030.9 by loosening the cap nut on the

o il 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. Dis assemble 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

h ousing.

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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 13 2.22. Disassemble the thermocouple transmitters cables. Then disassemble the thermocouple set bus from the flange. Move the bus away from the engine

s imilarly as in 1.9.

2.23. Disassemble individual thermocouple transmitters. Mark the thermocouples orwrite down their correct location for assembly (M601E, M601F, M601T, GE Hseries). Verify the function of thermocouple transmitters using multimeter.

Move the cables 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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 14 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

g earbox and fourth screw with nut in the longitudinal parting flange of the

exhaust system and insert the “reduc tion 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 flange. “Reduc tion gearbox holder” (first part of
preparation for engine halving. Leave short screws

with nuts.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 15 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 preparation 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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 16 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 in let 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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 17 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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 18 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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 19 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 w asher.

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 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 20 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 pe rpendicular 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 21 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“

.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 22 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 23 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

- off

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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 24 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

w hile checking PT freeness and discharge pipe -304.7 freeness.

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

s crews 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 25 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. After 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 26 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 centrifug al 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).

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 27 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 a nd M6 ČSN 02 1402.44

and washers -4063.4. Leave only 2 nuts on the sides of the reduction gearbox near

the lev elling 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

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 28 3.3. Prevent power turbine from rotating with tools 300- 475

- 2024 and 300-557-

0038.L oosen 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 tool300- 475

- 2024. Remove the power turbine using tools 100-

477

- 1004 a nd 100

- 477 -1008

. Tools: Tools to prevent PT from rotating 300-475 -2024 a nd 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

- 3058.9 300

- 557

- 0038/02

300

- 475

- 2024

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 29 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 - 3041.5

300

- 745

- 7007

- 4512.5

Disassembled

screwsLN 5153 and

lock washers 5,2

ONL 3288.2 Holes for

jackscrews

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 30 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 a nd 100 -475

- 2055

. Tools: wrenches, tools for exhaust system removal 100-477 -1004 a nd 100-475 -2005

100

- 477

- 1004

100

- 475

- 2055 - 4.5

- 6.6

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 31 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

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 32 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

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 33 3.8. Remove support cone with PT shaft -403.7 from countershaft casing -62.2 using 3

ja ckscrews 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 shaf t

- 6172.5.

Tools: jackscrews 300-475-2011

- 6172.5

Bearing ring with

rollers

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 34 4. Inspection

4.1. Inspection of Quill shaft M601-6172.5, M601-6172.6

4.1.1. The Maxim um spline wear is 0,12mm based on the actual measurements.

4.1.2. Tools:

- Micrometer (resolution: Thousandth-meter)

- 2 calibrated rollers of 3,2 mm diameter with length to fit the spline which

will represents the maxim um allowable spline wear

4.1.3. Measurement:

4.1.3.1. Prior to measurement sufficiently clean the quill shaft

Note: Inspection area may be clean ed using a copper brush.

4.1.3.2. Perform measurement for minimum of 4 diameters, Fig 4.1.

Fig . 4.1

– quill shaft scheme with rollers

4.1.4. Requirement:

If one of the measured value is smaller than 28,6 mm the wear is more than

the maxim um allowed. 7 mm Two identical rollers>28.6mm

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 35 4.2. Inspection of Power turbine shaft M601-4004.7

4.2.1. Maxim um spline wear is 0,12mm based on the actual measurements.

4.2.2. Tools:

- Bar calibrated to a size of 19,175 mm diameter to fit between the rollers

- Two calibrated rollers of 2,8mm diameter which represents the maxim um

allowed spline wear

4.2.3. Measurement:

4.2.3.1. Prior to measurement sufficiently clean the power turbine shaft

Note: Inspection area may be clean ed using a copper brush.

4.2.3.2. Perform measurements for a minimum of 4 diameters, Fig 4.2

Fig. 4.2

– power turbine shaft scheme with rollers

4.2.4. Requirement:

If the calibrated bar with the rollers is possible to insert freely

– the spline wear

is more than maxim um allowed. Min. 7 mm Two identical rollers Calibrated to

 19,175 mm

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 36 4.3. Inspection of Support cone M601-457.7

4.3.1. Tools

- Magnifying glass 10x

- Suitable light

- Fluorescent-Penetrant inspection (FPI) kit

4.3. 2. Measurement:

4.3.2.1. Prior to measurement sufficiently clean the supporting cone

4.3.2.2. Perfo rm visual inspection using 10x lens on flange Ø67 mm. see fig 4.2.,

if no crack is visible, perform inspection using FPI kit on same area

4.3.3. Requirement:

Cracks are not allowable. If cracks are found, the part will be scrapped.

Fig. 4.3

– supporting cone scheme with inspection area of flange Ø67 mm

Inspection area

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 37 5. Assembly of the exhaust system

5.1. Put ring of the roller bearing on the quilt shaft -6172.5. For easier assembly it is

p ossible to “stick“ r ollers to the quilt shaft with Vaseline. Put the quilt shaft -6172.5

in to the countershaft casing -62.2. Marked teeth of the quilt shaft must fit to the

m arked teeth on countershaft gears.

Tools: none

- 6172.5

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 38 - 6172.5

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 39 - 63.6 - 62.2 - 6172.5

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 40 5.2. Degrease contact surface of the support cone with PT shaft, complete -403.7 and

con tact surface of countershaft casing -62.2. Then apply Alhyl on those surfaces.
Ap ply Vaseline on all the tubes and O-rings.

Tools: Vaseline, Alhyl

Degrease + apply

Alhyl vaseline

Degrease + apply

Alhyl

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 41 5.3. Put support cone with PT shaft complete -403.7, on the reduction gearbox -6.6. Mark

o n 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

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 42 5.4. Put ring - 6014.9, retaining ring -6100.9 and bolt -6170.9 into the PT shaft. Teeth on

the low er 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

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 43 5.5. 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

u nless 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 Rotational part 300

- 475

- 2022

300

- 475

- 2022

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 44 5.6. Lock retaining ring -6100.9 with tool 300-476

- 0018

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

D

D view

300

- 476

- 0018/01

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 45 5.7. Put O- ring LN 5096 on insert -659.9. Put insert -659.9 into PT shaft -4004.7. Apply

V aseline 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

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 46 5.8. 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

5.9. 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 a nd

- 4066.4. Tighten at least 4 nuts on the reduction gearbox

- 6.6 and exhaust system -4.5 flange. Nástroje: Konkor 101

, stranový klíč

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 47 5.1. 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.

5.2. 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

o n 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 - 4.5

- 6.6 levelling mark center screw

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 48 12x apply Molycote

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

- 4512.5

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 49 5.3. 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 and a hammer. The sign “xxx” must be on the top.

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

Warming tool

Z3

- 01197

- 00

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 50 5.4. Put nuts - 3041.5 and lock washers -3058.9 on screws -3363.5. Firstly put the nut nr. 1

w hich 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

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 51 5.5. 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

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 52 5.6. 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

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 53 5.7. 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

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 54 6. Assembly

6.1. Bind lashing wire to cap nuts of the oil pressure pipes -342.9 and oil drain

p ipes -304.6, i.e. cap nuts -3006.9 and -3007.9 for following pulling the nuts

fro m the exhaust housing so that it has at least 250 mm. At M601D also bind the lashing wire to the bushing from the thermocouples.

6.2. 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 55 6.3. 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

en gine 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

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 56 6.4. Disassemble technological screws from the GT guide vane ring flange and centrifugal compressor case flange and r elease 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 57 6.5. Add number of other screws to the flange (in particular short ones, do not forget to rub them in Molyka) 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 58 6.6. 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

s crews 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

h older -8015.6 (slightly turned to the top of the engine). Insert holders of the

fro nt 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

u nder 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

o f 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

thermo couple 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 59 6.7. Measure individual thermocouples and check their state. (no clearance, nut must be tightened).

6.8. 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.

6.9. 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 60 6.10. 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.

Po sition 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

excep tion 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

po les, 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 61 6.11. 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

m ust 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

b ushing using vaseline, assemble the bushing and then remove it and check that the ring did not move.

6.12. 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

n ut, 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 62 6.13. 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

a nother 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.

6.14. Slide cover -8048.8 on the torqumeter pipe -840.9. Connect the torquemeter

p ipe to the pipe -841.6 using cap nut. Tighten the nut and secure with lashing

w ire. 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

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 63 6.15. Check O rings LN 5161 (2ks) and LN 5162 (2ks), which are on pipes -826.6 a -

827.6, or replace if necessary.

6.16. At the pressure oil pipe -826.6, clean the contact surfaces (on the side of the

p ipe 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,

s ealing -8052.8 and fix the covers to the partition with screws LN 5084, nuts LN

5167 a nd washers LN 5165.

6.17. To the reduction gearbox, fix a pipe with two M5 CSN 021401.44 nuts, insert

lock washers 5.2 LMN 3290 under the nuts.

6.18. Insert a washer on pipe -826.6 and fix the pipe to the flange of the exhaust

ca se 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.

6.19. Ass emble the pressure oil pipe to GT -839.6 using cap nuts to the pipe -826.6

a nd pressure oil bushings -827.9 and secure with lashing wire. On both ends,

in sert sealing rings Js 4 -8056.9 to ONL connections.

6.20. T o 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

en d 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

ge arbox 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 64 6.21. 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

in serted 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 65 6.22. In the flange of the exhaust case, insert air intake pipe -880.8. Apply ALHYL

p aste 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 66 6.23. 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

o ther 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 -8 006.7 and sealing

- 8005.7 on the inflate pipe -828.7 and fix them in the opening in the front

fi rewall 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 67 6.24. 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

g earbox flange).

Assemble the front holder

- 848.6 (cable platform) to three

screws

- 4055.4 with relevant self

- locking nuts

- 3009.4.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 68 6.25. Connect electrical installation and fire detector (if assembled) cables to the front holder -848.6 (to the cable platform).

6.26. L oosen the pipe to EHO -846.9 (if assembled along with EHO) from the

p ropeller 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 la shing
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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 69 6.27. To the reduction gearbox flange, assemble, to position 3 and 4 to the leftclockwise from the centering screw fire detector (if assembled) using two selflocking nuts M6 ONL 3248, and insert washers LN 5275 under them. Fix the cable with holder to the reduction gearbox flange to position 1.

6.28. 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

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 70 6.29. If electrohydraulic actuator is part of the engine, insert to it the relevant connector (plug), tighten and secure with lashing wire.

6.30. 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

p art 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 71 6.31. Assemble the pipe of the feathering pump -818.6 (if it was assembled). On it,

s lide the cover sheet -8048.8, sealing -8058.8 and rubber insert -8059.8 and

s lide 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 p ump 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)

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 72 6.32. Connect the connector to the ELM switch and secure with lashing wire. If ELM is part of the engine.

6.33. 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 73 6.34. Electrical installation cable attach to the feathering pump pipe -818.6, or as it

w as 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).

6.35. 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 74 5.1. Disassemble propeller regulator control device. 5.62.1 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,

in sert 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). 5.62.2 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, a nd secure it. 5.62.3 Connect control rod of the propeller regulator to the propeer regulator using pin, washer and cotter pin, and secure it.

5.62

. 2

.

5.62

. 1.

Between the

screw head and

insulation,

exhaust case

holder is located. Control case

holder Pertinax

insulation Liner

5.62

. 3

.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 75 6.36. Assemble the water extinguishing platform, secure the cap nuts with lashing
wire (if assembled).

6.37. Check the completeness of the engine.

6.38. Assemble propeller and bonnet.

6.39. Add oil to the engine, discharge air from the oil system. Record the executed

work in the engine log book.

6.40. 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.

### Appendix 2 :

M601 Reduction Gearbox and Supporting Cone Inspection procedure No. M601D/44 R 2

M601D

- 1/29 R 2

M601D

- 11NZ/18 R 2 M601E/59 R 2

M601E

- 11/28 R 2 M601E11A/15 R 2

M601E

- 21/26 R 2 M601F/26 R 2

GE PROPRIETARY INFORMATION : Subject to the restrictions on the cover page P a g e | 76 7. 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 valies of spline wear for quill shaft and the PT
shaft into the engine log book.