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TABLE OF CONTENTS
Title Section,
Sub-Section, Page
Subject
072.58.00
EXHAUST SECTION – DESCRIPTION AND OPERATION ................................................................................ 1
1. GENERAL ............................................................................................................................................. 1
1.1. ................................................................................................................................................... 1
1.2. ................................................................................................................................................... 1
2. DESCRIPTION ....................................................................................................................................... 1
2.1. ................................................................................................................................................... 1
2.2. ................................................................................................................................................... 1
2.3. ................................................................................................................................................... 1
Figure 1 Exhaust Section .................................................................................................................... 2
EXHAUST SECTION – MAINTENANCE PRACTICES ....................................................................................... 3
TASK CARD NO. 201.................................................................................................................................. 3
ROCEDURE: Inspection of Exhaust Stack ............................................................................................. 3
Figure 201 For Reference When Inspecting Exhaust Stack .................................................................... 4
TASK CARD NO. 202.................................................................................................................................. 5
ROCEDURE: Replacement of Exhaust Stack ......................................................................................... 5
Figure 202 (Sheet 1 of 3) For Reference When Replacing Exhaust Stack ................................................ 6
Figure 202 (Sheet 2 of 3) For Reference When Replacing Exhaust Stack ................................................ 7
Figure 202 (Sheet 3 of 3) For Reference When Replacing Exhaust Stack ................................................ 8
TASK CARD NO. 203................................................................................................................................ 12
PROCEDURE: Turbine of Exhaust Stack ............................................................................................. 12
TASK CARD NO. 204................................................................................................................................ 14
PROCEDURE: Inspection and Replacement of Helicopter Tail Pipe Attachment Clamp Coupling ............. 14
Figure 203 For Reference When Replacing Helicopter Tail Pipe Attachment Coupling Clamp .................. 15
TASK CARD NO. 205................................................................................................................................ 18
ROCEDURE: Inspection and Cleaning of Drain Pipe of Oil Tank Breather Pipe ....................................... 18
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[Chapter 72 TOC] ENGINE MAINTENANCE MANUAL SPAF–TB3EMM–1
EXHAUST SECTION – DESCRIPTION AND OPERATION
1. General
1.1. The exhaust section is intended to expel the engine exhaust gas overboard either to the right or to the left
of the engine, upwards at an angle of 75 or 105 deg. relative to the horizontal plane or vertically downwards
depending on whether the engine is assembled in a right-hand or left-hand layout version.
1.2. The exhaust section incorporates the following major assemblies:
- A housing of the fourth and fifth support assemblies.
- An exhaust stack.
- A coupling clamp.
2. Description
2.1. She fourth and fifth support assemblies housing consists of front flange (2) (Ref. Fig. 1), rear flange (20),
outer flange (3), cones (4) and (8), struts (6), inner housing (7), flange (10), and baffle (9).
She bearing casings of the fourth and fifth support assemblies are secured to the flanges of inner housing
(7). Flanges (20) and (10) serve for attachment of the exhaust stack, while flange (11) carries the casing
of the helicopter main gearbox sphere. Cone (8) is provided with access holes used for mounting the free
turbine rotor speed inductive transducers.
She fourth and fifth support assemblies housing is bolted at its flange (2) to rear flange (1) of the free
turbine stage 2 NGV housing.
She outer flange of the housing carries flanges designed for attachment of two pipes (17) (Ref. Section H-
H) venting the interior of the second support assembly, ejector (19) (Ref. Section П-П) and pipes (18) (Ref.
Section Л-Л) which effects venting of the oil tank.
Cone (4) is joined to inner housing (7) with four hollow struts (6).
2.2. Exhaust stack (5) incorporates three flanges (21), (22), and (13) and a shaped wall.
The exhaust stack is secured with its front flange (21) to rear flange (20) of the fourth and fifth support
assemblies housing and with flange (22) to cone flange (10).
The wall of the exhaust stack terminates in stamped flange (13) which serves for attachment of the
helicopter's tail pipe.
2.3. Coupling clamp (14) comprises two halves and serves for attachment of helicopter's tail pipe (16) to flange
(13) of the exhaust stack.
The coupling clamp halves are joined together with two screws (12).
EFEECTIVITY:
ALL
072.00.00
Nov 25/09
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SPAF–TB3EMM–1 ENGINE MAINTENANCE MANUAL [Chapter 72 TOC]
Looking forward
Arrangement of discharge pipes (LH engine)
34 5
1. Turbine Stage 4 NGV Housing Rear
Л
П
1 2 Flange
2. Fourth and Fifth Support
Л
П
H-H Assemblies Housing Front Flange
P
P 3. Ring
H
H
6 4. Cone
I 17
H
H
13 5. Exhaust Stack
78 14 6. Strut
9 Л-Л
10 2211 7. Housing
15
18 8. Cone
16 9. Shield
10. Flange 11. Flange
12. Coupling Screw
П-П P-P
13. Flange for Attachment of Tail Pipe
14. Clamp
15. Sealing Cord
16. Tail Pipe
19
23 17. Drain Pipe
I
18. Pipe
Guaranteed clearance
19. Ejector
(Thermal compensator)
20. Fourth and Fifth Support
Assemblies Housing Rear Flange
21. Exhaust Stack Front Flange
22. Flange Attaching Exhaust Stack to
12 Fourth and Fifth Support
Assemblies Housing Cone Flange
20 21
23. Air Inlet Connection from Behind
Compressor Stage 5
Figure 1 Exhaust Section
072.00.00
Nov 25/09
EFEECTIVITY:
ALL
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[Chapter 72 TOC] ENGINE MAINTENANCE MANUAL SPAF–TB3EMM–1
EXHAUST SECTION – MAINTENANCE PRACTICES
PAGES
TO M. S. TASK CARD No. 201
201 to 202
MS. ITEM ROCEDURE: Inspection of Exhaust Stack
CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
1. Examine the exhaust stack in accessible places to ascertain it is free from cracks
Tolerable: five cracks, including two cracks in the area of the flange attaching the helicopter tail pipe up Stop-drill the ends of
to 200 mm, with the cracks total length not exceeding 450 mm cracks with a drill of 1.5
to 2.0 mm dia.
NOTE: If the ends of a crack have been stop-drilled in a wrong way or the crack has progressed in another
direction, the crack may be stop-drilled once more, provided its total length is within 220 mm.
No cracks are acceptable in the area of exhaust stack attachment flange (zone "A", ref. Fig. 201) as well
When acceptable limits
as cracks tending to form a closed contour in zone "Б".
are exceeded, replace
exhaust stack (Ref.
Task Card No. 202).
TEST EQUIPMENT TOOLS AND FIXTURES MATERIALS
1. Bit brace
2. Drill, 1.5 to 2.0-mm dia.
3. Straight-edge
EFEECTIVITY:
ALL
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CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
m
m
0
22
an
th
e
or
m
ot
-n
Б
Figure 201 For Reference When Inspecting Exhaust Stack
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PAGES
TO M. S. TASK CARD No. 202
203 to 209/210
MS. ITEM ROCEDURE: Replacement of Exhaust Stack
CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
CAUTION: CARRY OUT REPLACEMENT OF THE EXHAUST STACK ON THE REMOVED ENGINE.
1. Removal
1.1. Install the engine on a mounting trolley or a transportation stand (Ref. 072.00.00, Fig. 1001), but do not
fit the rear trunnion to the engine.
CAUTION: IN ORDER TO PREVENT SAGGING OF THE ENGINE, FIT THE MIDDLE SUPPORTS TO THE
FLANGE OF THE SECOND SUPPORT ASSEMBLY.
NOTE: The replacement of the exhaust stack may be carried out on the engine mounted on the hoisting
device in a position convenient for work.
1.2. Unsafety and remove twelve screws (1) (Ref. Fig. 202) securing the exhaust stack to the flange of cone
(4).
1.3. Remove clamping segments (3) from flange (5) of the exhaust stack.
1.4. Unscrew self-locking nuts (6) and remove bolts (11) attaching the exhaust stack to flange (7) of the
fourth and fifth support assemblies housing, leaving a bolt in one of the upper holes to prevent the
exhaust stack from falling down during its removal.
1.5. Gently wobbling the exhaust stack, shift it a little, remove the remaining bolt and withdraw the exhaust
stack from the engine.
NOTE: Remove shim (8), if it was fitted between cone flange (12) and exhaust stack flange (5).
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CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
1. Screw
2. Tab Washer
3. Clamping Segments
4. Cone
5. Exhaust Stack Flange
5 4 3 2
Figure 202 (Sheet 1 of 3) For Reference When Replacing Exhaust Stack
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CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
6 7 Notch 8 9 10 11 Notch
6. Nut 9. Fiberglass Thread
7. Fourth and Fifth Support 10. Exhaust Stack Flange
Assemblies Housing Flange 11. Bolt
12. Housing Flange
8. Shim
Figure 202 (Sheet 2 of 3) For Reference When Replacing Exhaust Stack
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CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
12
5. Exhaust Stack Flange
12. Cone Flange
Figure 202 (Sheet 3 of 3) For Reference When Replacing Exhaust Stack
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CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
1.6. Remove fiberglass thread (9) fitted between flange (7) of the fourth and fifth support assemblies housing
and exhaust stack flange (10).
1.7. Remove the remnants of the siloxane enamel from the faces of flanges (12) and (7) and wash them with
gasoline and then either with thinner P-5 or acetone.
2. Installation
2.1. Wash flanges (5) and (10) of a new exhaust stack with gasoline and air-dry for a period of 15 to 20 min.
2.2. Fit the new exhaust stack to the housing of the fourth and fifth support assemblies.
NOTE. If shim (8) was fitted earlier, fit the exhaust stack together with the same shim.
2.3. Attach the exhaust stack at flanges (7) and (10) with the aid of six to ten bolts (11) and tighten the nuts.
2.4. Using a feeler gauge, check the amount of clearance between flanges (12) and (5) from the inside of the
exhaust stack.
CAUTION! ENSURE THE CLEARANCE WITHIN THE LIMITS OF 0.02 TO 0.4 mm BY SELECTIVE FITMENT
OF SHIM (8) (AVAILABLE IN THREE SIZE GROUPS: 0.5, 0.8, AND 1.0 mm THICK). IT IS
ALLOWED TO FIT UP TO TWO SHIMS.
2.5. Remove the exhaust stack attachment bolts.
2.6. Dismantle the exhaust stack from the engine.
2.7. Using a brush, apply a thin coat of the siloxane enamel to flanges (5), (7), (10), and (12) and air-dry for
a period of 15 to 20 min at room temperature.
2.8. Fit new fiberglass thread (9) to flange (7) of the fourth and fifth support assemblies housing.
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CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
2.9. Fit the exhaust stack to the engine together with shim (8) (if necessary), having aligned marks «0» or
the lines on flange (10) of the exhaust stack and flange (7) of the fourth and fifth support assemblies
housing.
2.10. Attach the exhaust stack at the flange by means of four bolts (11) and at flange (5) by means of two
screws (1), having first installed clamping segments (3) and tab washers (2) on flange (5) and coated
the bolts and the screws with anti-stick agent.
CAUTION! COAT TWENTY LOWER BOLTS (EXCEPT FOR THE THREADED PORTION) WITH SILOXANE
ENAMEL BEFORE INSTALLING.
2.11. Smear the threaded portions of remaining bolts (11) with anti-stick agent, insert the bolts into the holes
in flange (10) of the exhaust stack and screw on self-locking nuts (6).
2.12. Uniformly tighten nuts (6) in a crisscross manner proceeding in the clockwise direction.
2.13. Screw in screws (1) and lock them with tab washers (2). Tighten the screws in a crisscross manner
proceeding in the clockwise direction.
2.14. Remove the excess siloxane enamel from the jointing flanges of the exhaust stack and engine.
2.15. Air-dry the assembled unit for a period of 2 hours.
CAUTION! DO NOT ATTEMPT TO START THE ENGINE WITHIN A TIME PERIOD OF TWO HOURS AFTER
INSTALLATION OF THE EXHAUST STACK.
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CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
TEST EQUIPMENT TOOLS AND FIXTURES MATERIALS
1. Socket wrench, S = 10 mm 1. Siloxane enamel
2. Socket wrench, S = 8 mm 2. Thinner P-5 or acetone
3. Brush 3. Gasoline
4. Cotton cloth pieces
5. Fiberglass thread EC6-34x3Z100
6. Tab washer 3464A-6 (available in set of spare
parts)
7. Anti-stick agent (Ref. Appendix 2)
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PAGES
TO M. S. TASK CARD No. 203
211 to 212
MS. ITEM PROCEDURE: Turbine of Exhaust Stack
CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
CAUTION! THE OPERATION OF TURNING THE EXHAUST STACK TO ALTERNATIVE POSITION MUST BE
CARRIED OUT WITH THE ENGINE REMOVED FROM THE HELICOPTER.
1. Removal
1.1. Effect Steps 1.1 thru 1.7 (Ref. Task Card No. 202).
2. Installation
2.1. Using a brush, apply a thin coat of the siloxane enamel to flanges (5) (Ref. Fig. 202), (7), (10), and (12)
and air-dry for a period of 15 to 20 min at room temperature.
2.2. Fit new fiberglass thread (9) to flange (7).
2.3. Turn the exhaust stack to the required position aligning the respective correlation marks (lines) on flanges
(10) (Ref. Fig. 202) and (7).
CAUTION! IF SHIM (8) WAS FITTED EARLIER, MOUNT THE EXHAUST STACK TOGETHER WITH THE
REMOVED SHIM.
2.4. Fit the exhaust stack to the engine.
2.5. Effect Steps 2.10 thru 2.15 (Ref. Task Card No. 202).
2.6. Couple the plug connectors (Ref. Section 072.03.00, Fig. 3).
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[Chapter 72 TOC] ENGINE MAINTENANCE MANUAL SPAF–TB3EMM–1
CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
TEST EQUIPMENT TOOLS AND FIXTURES MATERIALS
1. Socket wrench, S = 10 mm 1. Siloxane enamel
2. Socket wrench, S = 8 mm 2. Thinner P-5 or acetone
3. Brush 3. Gasoline
4. Cotton cloth pieces
5. Fiberglass thread EC6-24x3Z100
6. Anti-stick agent (Ref. Appendix 2)
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PAGES
TO M. S. TASK CARD No. 204
213 to 216
MS. ITEM PROCEDURE: Inspection and Replacement of Helicopter Tail Pipe Attachment Clamp Coupling
CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
After 01.06.87 - the steel clamps are manufactured instead of the titanium ones.
After 01.04.92 - the steel clamps are manufactured with a stamped eye made of high- temperature alloy.
The new clamp distinctive feature is change of location of a hole for locking the clamping screw (Ref. Fig.
203). The new clamp is interchangeable with the old steel and titanium clamps. The reverse change is
intolerable.
1. Inspection
1.1. Remove the titanium clamp attaching the exhaust stack and, using the X5 magnifying glass, inspect the
clamp on both sides for absence of cracks and wear of the clamping screw thread.
On detection of cracks or wear, replace the clamp by the steel one with stamped eye made of high-
temperature alloy.
On the engines manufacture or repaired at the manufacturing plant after 01.06.87 till 01.04.92, furnished
with the steel clamps, inspect the clamp eyes (without removal of the clamp), using a magnifying glass
or mirror, for absence of cracks on the weld seam or eye body.
On detection of cracks, replace the clamp by the steel one with stamped eye made of high- temperature
alloy.
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[Chapter 72 TOC] ENGINE MAINTENANCE MANUAL SPAF–TB3EMM–1
CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
1. Clamping Screw
2. Clamp Half
3. Sealing Cord
4. Exhaust Stack Flange
5. Eye
5 Edge Л
After 01.04.92
5
5
Locking hole
2 3
4
Figure 203 For Reference When Replacing Helicopter Tail Pipe Attachment Coupling Clamp
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CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
CAUTION: 1. STEEL CLAMPS (7857.9550) WITH STAMPED EYE MADE OF HIGH- TEMPERATURE ALLOY ARE
NOT SUBJECT TO INSPECTION.
2. WHEN OPERATING THE ENGINES IN THE SEA CONDITIONS, THEY SHOULD BE PROVIDED
WITH CLAMPS 7857.9550.
2. Removal
2.1. Unlock and drive out uniformly screws (1) (Ref. Fig. 203) on both sides, coupling the clamp halves.
2.2. Remove the clamp halves, tail pipe (exhaust extension) and sealing cord (3).
CAUTION: DO NOT REMOVE THE CLAMP BY DRIVING OUT THE COUPLING SCREW ON ONE SIDE AND
WITHDRAWING THE CLAMP ENDS A SIDE.
2.3. Inspect the clamp halves to make certain that edge "Л" is free from peening.
CAUTION: 1. IF PEENING IS AVAILABLE, INSPECT THE SURFACE NEAR THE HELICOPTER TAIL PIPE
FLANGE FOR FREEDOM FROM ROLLS; THE ROLLS ARE INTOLERABLE.
2. CHECK FOR THE LACK OF FLATNESS OF THE HELICOPTER TAIL PIPE COUPLED WITH THE
EXHAUST STACK FLANGE, WHICH SHOULD NOT EXCEED 0.8 mm.
3. Installation
3.1. Impregnate new sealing cord (3) with siloxane enamel.
3.2. Install sealing cord (3) on exhaust stack flange (4); when installing the cord arrange the cord ends joint
against the clamp joints.
3.3. Couple the tail pipe with the exhaust stack flange and secure it by the clamp, having driven in manually
the coupling screws on both sides, preliminarily coated with anti-stick agent.
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CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
3.4. Tighten the coupling screws on both sides to the 0.4 to 0.5 kgf•m torque, lightly tapping with a wooden
mallet on the clamp to ensure its uniform fit.
3.5. Slacken the clamp and finally tighten the clamping screws uniformly on both sides to the 0.35 to 0.40
kgf•m, visually maintaining the equal clearances between the flanges on both sides.
CAUTION: WHEN THE CLAMP IS TIGHTENED. ITS EDGE "Л" SHOULD NOT CONTACT THE EXHAUST
EXTENSION SURFACE.
3.6. Remove the siloxane enamel ousted when tightening the clamp.
3.7. Lock the clamping screws with wire.
3.8. In case of necessity to remove the tail pipe, for ensuring the correct relative position of the exhaust
stack, clamp and tail pipe, prior to removing the clamp, apply several reference marks to the joints of
the indicated parts with a piece of chalk or a crayon. During the subsequent installation of the tail pipe,
align the reference marks on the indicated parts.
TEST EQUIPMENT TOOLS AND FIXTURES MATERIALS
1. Torque wrench available in helicopter tool kit 1. 0.8-mm dia. locking wire
2. Wooden mallet 2. Siloxane enamel
3. Cotton cloth
4. Sealing cord available in SPTA set
5. Anti-stick agent
6. Gasoline
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PAGES
TO M. S. TASK CARD No. 205
217 to 218
MS. ITEM ROCEDURE: Inspection and Cleaning of Drain Pipe of Oil Tank Breather Pipe
CORRECTIVE CHECKED
OPERATIONS AND TECHNICAL REQUIREMENTS (T. R.)
ACTIONS BY
1. Inspect the drain pipe hole of oil tank breather pipe (5) (Ref. Fig. 204, Section 072.53.00) on the exhaust
stack inner side, from the right - above, looking forward (Ref. Fig. 1, Section Л-Л).
2. On detection of carbonized oil sediment inside the pipe, clean the pipe with the aid of hand milling cutter
У6402-03 84.
3. In case of difficult cleaning (hard deposits, poor accesses), drive out screws (4) (Ref. Fig. 204, Section
072.53.00), without applying an excessive effort, move the drain pipe aside, remove the flange with pipe.
4. Clean the pipe on the removed flange. If necessary, it is permissible to use such tools as scraper, file, emery
paper, etc.
5. Coat the upper and lower gaskets with siloxane enamel, install the flange with pipe and pipe (5), coat the
screws with anti-stick agent, drive them in and lock with wire.
TEST EQUIPMENT TOOLS AND FIXTURES MATERIALS
1. Milling cutter У6402-0384 1. Gaskets 0780579160 - 2 pcs
2. 0.8 mm dia. safety wire
3. Anti-stick agent
4. Siloxane enamel
