# Lycoming Mandatory Service Bulletin 614: Revision A

- Rights: © Avco Corporation. Filed by the FAA in regulations.gov docket FAA-2014-0940; AD 2015-10-06 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Lycoming Mandatory Service Bulletin 614](https://openairdocs.org/service-documents/lycoming/sb-614.md)
- Title as filed: U.S. DOT/FAA - MSB 614A
- Pages: 12
- PDF: https://openairdocs.org/files/sha256/1c/5c/1c5cb9a8cb8df2a8c0b4af014b6e18f32d13ed1e06368ffae84033ad79e8f6c9
- Page: https://openairdocs.org/service-documents/lycoming/sb-614/file/1c5cb9a8cb8d

## Text

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### Page 1 (OCR)

652 Oliver Street  LYCOMING  MANDATORY
Williamsport, PA 17701 U.S.A.
Tel. +1-800-258-3279 (U.S. and Canada)  Tel.  +1-570-323-6181 (International)  SERVICE BULLETIN
Fax. +1-570-327-7101
www.lycoming.com
DATE:  October 10, 2014  Service Bulletin No. 614A
(Supersedes Service Bulletin No. 614)
Engineering Aspects are
FAA Approved
SUBJECT:  Exhaust System Inspection and Turbocharger Mounting Bracket Replacement
MODELS AFFECTED:  Lycoming Engine Model TIO-540-AJIA with a Serial Number Identified in
Table 1 or any TIO-540-AJIA with a Turbocharger Mounting Bracket
Purchased as a Spare between April 5, 2012 and May 29, 2014
TIME OF COMPLIANCE:  The Required Action must be completed within the next 25 hours or next
scheduled maintenance event (whichever occurs first) for:
• Engines identified in Table 1 with 0 to 400 hours time in service since
new, rebuilt, or overhauled.
• Engines with a turbocharger mounting bracket purchased as a spare
between April 5, 2012 and May 29, 2014, with 0 to 400 hours time in
service since bracket replacement.
• Return turbocharger mounting brackets currently in stock.
The Required Action must be completed at next overhaul for:
• Engines identified in Table 1 with over 400 hours time in service since
new rebuilt, or overhauled.
• Engines with a turbocharger mounting bracket purchased as a spare
between April 5, 2012 and May 29, 2014, with over 400 hours time in
service since bracket replacement.
REASON FOR REVISION: Engine serial number L-13961-61E was added to Table 1. There are no other
changes.
NOTE
Incomplete review of all the information in this document can cause errors. Read the entire
Service Bulletin to make sure you have a complete understanding of the requirements.
This Service Bulletin  contains turbocharger mounting bracket replacement instructions,
disassembly/inspection/assembly instructions for the exhaust system (Figures 1 and 2), and warranty
instructions for specific Lycoming engine models TIO-540-AJIA, identified in Table 1. This mandatory
inspection and turbocharger mounting bracket replacement must be done on engines identified in the Time
of Compliance above.
Table 1
Serial Numbers of Affected Lycoming Engine Models T10-540-AJTA
Engine Serial Number  Engine Serial Number  Engine Serial Number  Engine Serial Number
L-6748-61E  L-13828-61E  L-13832-61E  L-13843-61E
L-13817-61E  L-13831-61E  L-13833-61E  L-13847-61E
L-13819-61E  L-13823-61E  L-13839-61E  L-13855-61E
ISSUED  REVISED  PAGE NO.  REVISION
General Aviation
Manufacturers Association  MO  07  DAY  YEAR  MO  DAY  YEAR  1 of 12  A
©2014 Avco Corporation. All Rights Reserved
Lycoming Engines is a division of Aveo Corporation

### Page 2 (OCR)

Table 1 (Cont.)
Serial Numbers of Affected Lycoming Engine Models TIO-540-AJIA
L-13856-61E  L-13947-61E  L-14011-61E  RL-2551-61E
L-13857-61E  L-13948-61E  L-14013-61E  RL-2848-61E
L-13866-61E  L-13949-61E  L-14014-61E  RL-3450-61E
L-13867-61E  L-13950-61E  L-14015-61E  RL-4138-61E
L-13873-61E  L-13960-61E  L-14017-61E  RL-7243-61E
L-13882-61E  IL-13961-61E  L-14024-61E  RL-7512-61E
L-13883-61E  L-13962-61E  L-14025-61E  RL-8435-61E
L-13884-61E  L-13967-61E  L-14026-61E  RL-8767-61E
L-13885-61E  L-13973-61E  L-14028-61E  RL-8914-61E
L-13886-61E  L-13975-61E  L-14034-61B  RL-8979-61E
L-13895-61E  L-13976-61E  L-14054-61E  RL-9399-61E
L-13896-61E  L-13979-61E  L-14055-61E  RL-9466-61E
L-13898-61E  L-13981-61E  L-14056-61E  RL-9618-61E
L-13900-61E  L-13983-61E  L-14057-61E  RL-9663-61E
L-13902-61E  L-13984-61E  L-14062-61E  RL-10098-61E
L-13907-61E  L-13993-61E  L-14063-61E  RL-10194-61E
L-13913-61E  L-13996-61E  L-14066-61E  RL-10249-61E
L-13915-61E  L-13997-61E  L-14067-61E  RL-10615-61E
L-13930-61E  L-13998-61E  L-14069-61E  RL-11011-61E
L-13931-61E  L-13999-61E  L-14071-61E  RL-12121-61E
L-13934-61E  L-14000-61E  L-14076-61E  RL-12163-61E
L-13936-61E  L-14001-61E  L-14077-61E  RL-12343-61E
L-13938-61E  L-14003-61E  RL-1726-61E  RL-13352-61E
L-13939-61E  L-14004-61E  RL-1810-61E  RL-13601-61E
L-13946-61E  L-14005-61E  RL-1862-61E
Required Action
Exhaust System Disassembly and Removal
CAUTION
BEFORE DISASSEMBLY OF THE EXHAUST SYSTEM, IF THE ENGINE HAD BEEN
OPERATING, LET THE ENGINE AND THE EXHAUST SYSTEM COOL FOR 1 HOUR
OR LONGER AFTER ENGINE SHUTDOWN TO PREVENT BURNS.
NOTE
This procedure applies only to exhaust system components (Figure 3) that are installed on the
Lycoming TIO-540-AJIA engine at the factory and not airframe-installed exhaust system
components. As a point of reference, Figure 4 identifies some of the factory-installed exhaust
components on the engine and airframe-installed exhaust components around the
turbocharger.
ISSUED  REVISED  PAGE NO.  REVISION
MO  DAY  YEAR  MO  DAY  YEAR
2 of 12  S.B. 614
07  24  14  10  10  14

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NOTE
This procedure can be done on an engine installed in an airframe.
Cylinder #2
Cylinder #4
Cylinder #6
Examine This Saddle
Reinforced Weld Joint  Exhaust Pipes
Turbocharger Mounting Bracket
Turbocharger
Turbo Oil Drain Tank
Figure 1
Installed Exhaust System (#1, #3, #5 Cylinder - Right Side of Engine)
Cylinder #1  Exhaust Pipes
Cylinder #3
Cylinder #5
Turbocharger  Examine This Saddle
Reinforced Weld Joint
Figure 2
Installed Exhaust System (#2, #4, #6 Cylinder - Left Side of Engine)
ISSUED  REVISED  PAGE NO  REVISION
MO  DAY  YEAR  MO  DAY  YEAR
3 of 12  A  S.B. 614
07  24  14  10  10  14

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Left Exhaust Pipe
for Cylinder 2  Nut
Adapter for Exhaust  • Lock Washer
Pipe Cylinder 4  - Exhaust Flange Gasket  - Washer
- Washer  - Cable Assembly
Left Exhaust Pipe
- Self Locking Nut  Spacer
for Cylinder 4
Left Exhaust Pipe  Bolt-
for Cylinder 6
Bolt  - Self Locking Nut
• Adapter (for Exhaust
- Clamp  Pipe for Cylinder 1)
Exhaust Pipe for Cylinder 2-
- Exhaust Pipe for Cylinder 1
Exhaust Pipe for Cylinder 5
Examine This Saddle
Reinforced Weld Joint
- Exhaust Pipe for Cylinder 3
Flange
Exhaust  Plug
Transition  Bushing -  Exhaust Pipe for
Assembly  Intercylinder 5
Bolt ~
-V-Band Coupling Gasket
-V-Band Coupling
-V-Band Coupling
- V-Band Coupling Gasket
- Exhaust Bypass Valve
Washer
9
Nuts
- Turbocharger
Figure 3
TIO-540-AJ1A Turbocharged Exhaust System
ISSUED  REVISED  PAGE NO.  REVISION
MO  DAY  YEAR  MO  DAY  YEAR  4 of 12  A  S.B. 614
07  24  14  10  10  14

### Page 5 (OCR)

1. Identify affected engines in Table 1 that are either installed in your aircraft or in your inventory.
2. Before disassembly either draw a sketch or take a photograph of the exhaust system installed on the
engine and attached to the airframe for reference on reassembly.
3. Make a copy of the Exhaust System Inspection/Assembly Checklist included in this Service Bulletin
for each affected engine to be examined as a record of inspection and replacement of the
turbocharger mounting bracket in compliance with this Service Bulletin.
4. To access, the exhaust system, remove any airframe components as necessary per the airframe
manufacturer's instructions.
Air Intake
Air Intake
Self Locking Nut
Cable Assembly
Turbocharger
Airframe Exhaust Tailpipe
Clamp
Figure 4  ›charger
Installed Exhaust System
5. Remove the bolt and self-locking nut
from the exhaust system end of the cable
assembly (Figure 5). Discard the self-
locking nut.
Figure 5
Exhaust System End of the Cable Assembly
6. Remove the V-band coupling from the following two slip joint connections (Figure 3) on the exhaust
system:
• Exhaust pipe for intercylinder number 5 and exhaust transition assembly connection
• Exhaust transition assembly and exhaust bypass valve connection
7. Remove and discard the gasket (Figure 3) from each of the two removed V-band couplings.
• CAUTION
DO NOT USE ETCH TOOLS, GRAPHITE LEAD PENCIL, OR SCRIBE TO APPLY AN
IDENTIFIER MARK ON EXHAUST PIPES. USE EITHER A NON-GRAPHITE
MARKER SUCH AS COLORBRITE NO. 2127 OR 4127 OR A MARKS-A-LOT.
8. For reference, prior to exhaust system disassembly, use either a non-graphite marker such as
Colorbrite No. 2127 or 4127 or a Marks-A-Lot marker to identify the exhaust system pipes on each
side of the engine (Figure 3).
ISSUED  REVISED  PAGE NO  REVISION
MO  DAY  YEAR  MO  DAY  YEAR
5 of 12  A  S.B. 614
07  24  14  10  10  14

### Page 6 (OCR)

CAUTION
AS A SAFETY PRECAUTION, USE THREE PEOPLE TO COMPLETE THE NEXT
STEPS TO PREVENT INJURY AND PARTS FROM FALLING.
9. While one person removes the self-locking nuts and washers (Figure 3) from the vertical portion of
the three exhaust pipes on the 2-4-6 (even numbered) cylinder side of the engine (Figure 2), two
people lower and remove the exhaust pipes and put them on a clean work surface. Discard the self-
locking nuts and gasket from each exhaust pipe flange at the cylinder head.
10. Repeat the previous step for the three exhaust pipes on the 1-3-5 (odd-numbered) cylinder side of the
engine (Figure 1).
11. Disconnect the hose and air inlet tube from the turbocharger (Figure 6).
Stud
Rear Turbo
Air Inlet Tube  Support Bracket  Washer
Self Locking Nut
Lock Washer  Washer
Bolt  Nut  Self Locking Nut
Washer  Bolt Stud
Washer
Lug  > Bolt
- Stud
Exhaust
Hose  Transition  Lockplate
Assembly  Turbocharger Mounting
Bracket P/N 07A22265
Spacer
Washer
Self Locking Nut
Turbocharger
Figure 6
Turbocharger
ISSUED  REVISED  PAGE NO  REVISION
MO  DAY  YEAR  MO  DAY  YEAR
6 of 12  S.B. 614
07  24  14  10  10  14

### Page 7 (OCR)

Turbocharger
Mounting Bracket
90° Bracket
Nut
Nut
Lock Washer  • Lock Washer
Hose
Washer  Clamp  Washer
Turbo Oil Drain Tank
Support Bracket
Screw  View A
Nut  • View A
Hose *
Lock Washer
Turbo Oil Drain Tank  Washer
Screw
Figure 7
Turbo Oil Drain Tank and Support Bracket
12. Disconnect and put a cap on the two hoses connected to fittings on the turbo oil drain tank (Figure 7)
and the hose connected to fitting on the turbocharger (Figure 7 - View A).
13. Remove the vertical bolt, washer, and self-locking nut from the lug on the exhaust transition
assembly (Figure 6).
NOTE
In the next step, keep the 90° bracket (Figure 7) and clamps attached to the hoses.
14. Remove the screw, washer, lock washer, and nut from the portion of the 90° bracket that attaches to
the turbo oil drain tank support bracket and turbocharger mounting bracket (Figure 7). Discard the
lock washer.
15. Remove the horizontal bolt, two washers, lock washer, and nut from the lug on the transition
assembly and rear turbo support bracket (Figure 6). Discard the lock washer. Remove and keep the
lug.
16. Support the turbocharger assembly and remove the self-locking nuts and washers from the studs and
turbocharger mounting bracket on the oil sump (Figure 6). Discard the self-locking nuts.
17. Carefully remove, as a unit, the turbocharger from the engine still attached to the exhaust transition
assembly, turbocharger mounting bracket, turbocharger oil drain tank, and its support bracket. Put
the assembly on a clean work surface.
18. Bend down the tabs of the lock plate (Figure 6).
19. Remove the two bolts, spacer, and lockplate that attach the turbocharger mounting bracket to the
turbocharger (Figure 6). Discard the lockplate. Keep the spacer for reassembly.
20. Remove the self-locking nut and washer from the stud that attaches the turbocharger mounting
bracket to the exhaust transition assembly (Figure 6). Discard the self-locking nut.
ISSUED  REVISED  PAGE NO  REVISION
MO  DAY  YEAR  MO  DAY  YEAR
7 of 12  A  S.B. 614
07  24  14  10  10  14

### Page 8 (OCR)

21. Remove the turbocharger mounting bracket and send this bracket to Lycoming Engines to receive a
replacement bracket as per warranty terms in this Service Bulletin. Refer to the replacement parts list
in the "Warranty Instructions" section of this Service Bulletin.
22. Remove the three bolts, three self-locking nuts and three washers that attach the exhaust transition
assembly to the turbocharger (Figure 6). Discard the self-locking nuts.
Exhaust System Inspection
CAUTION
CRACKED EXHAUST PIPES IN ANY  EXHAUST SYSTEM COMPONENT,
ESPECIALLY WELDED JOINTS, CAN CAUSE TOXIC GASES, SUCH AS CARBON
MONOXIDE, TO ENTER THE COCKPIT.
NOTE
Send any part that is cracked or damaged to Lycoming Engines for replacement under
warranty terms identified in this Service Bulletin.
1. Use a 10x power magnifying glass to examine the weld joints of the exhaust pipe for cylinder #3
(Figure 3). Closely examine the saddle reinforced weld joint (Figures 8 and 9). If any cracks or
damage are found, replace the exhaust pipe.
Inspect with 10X power magnifying glass.
Figure 8  Figure 9
Saddle  Saddle
2. Examine the #2 cylinder exhaust flange for damage or distortion. The flange must be straight and
have no signs of exhaust leaking past the gasket. If the flange or pipe is distorted or damage, replace
the pipe.
3. Examine the #2 cylinder exhaust port for signs of an exhaust leak or pulled exhaust studs. If evidence
of leakage, damage, or pulled studs are found, replace the cylinder.
4. Complete a visual inspection on the entire exhaust system (Figures 1, 2, and 3) for any signs of leaks,
distortion, or damage. Examine closely at all weld joints. Replace any damaged component.
5. Clean the exhaust pipes and flanges with approved solvents. Remove carbon or exhaust residue from
slip joint mating surfaces with a red Scotch-Brite™  pad or equivalent abrasive pad. Remove any
debris. Visually examine the cleaned exhaust pipes.
ISSUED  REVISED  PAGE NO  REVISION
MO  DAY  YEAR  MO  DAY  YEAR
8 of 12  S.B. 614
07  24  14  10  10  14

### Page 9 (OCR)

Exhaust System Assembly and Installation
1. Apply a uniform coating of Loctite C5-A® anti-seize compound or equivalent to the slip joint
mating surfaces (Figure 3) of the exhaust pipes.
2. Assemble the exhaust pipes at the slip joints and make sure there is no binding of the joined parts. If
any binding or tightness is found, replace the exhaust pipes.
3. Apply a uniform coat of Loctite® C5-A® anti-seize compound or equivalent to the stud (Figure 6) on
the exhaust transition assembly.
NOTE
When installing exhaust system components do not fully tighten any fasteners until all
components of the exhaust system are properly aligned and the fasteners can be torqued
evenly. Components must be able to be manipulated to align them.
4. Attach the exhaust transition assembly to the turbocharger (Figure 6) with the two bolts, three
washers, and three new self-locking nuts hand-tight.
5. Install the lug on the exhaust transition assembly with the vertical bolt, washer, and new self-locking
nut (Figure 6) hand-tight.
6. Apply a uniform coat of Loctite" C5-A® anti-seize compound or equivalent to the threads of the two
bolts that attach the new turbocharger mounting bracket, lockplate, and spacer to the turbocharger.
7. Install the new turbocharger mounting bracket P/N 07A22265 on the turbocharger (Figure 6) and the
stud on the exhaust transition assembly with the two bolts, spacer, and new lockplate. Torque the
two bolts to 160 to 190 in.-lb. (18 to 21 Nm). Bend the tabs (Figure 6) of the lockplate into place.
8. Install the turbocharger mounting bracket with the turbocharger and exhaust transition assembly on
the studs on the oil sump (Figure 6) with the washers and new self-locking nuts hand-tight.
9. Install the washer and new self-locking nut on the stud on the exhaust transition assembly hand-tight.
10. Install the horizontal bolt through the lug on the exhaust transition assembly with a washer, and new
self-locking nut (Figure 6) hand-tight.
I1. Install the screw, washer, and new self-locking nut that attaches the turbocharger oil drain tank
support bracket, and 90° bracket with the clamps attached, to the turbocharger mounting bracket
(Figure 7). Torque the clamps to 49 in.-lb. (5.5 Nm).
12. Apply a uniform coat of Loctite C5-A® anti-seize compound or equivalent to the first three threads
of each exhaust stud in all six cylinder heads.
CAUTION
USE CARE TO SUPPORT  THE ENTIRE EXHAUST SYSTEM DURING
INSTALLATION. DO NOT FORCE, PRY, OR BEND COMPONENTS DURING FINAL
ALIGNMENT TO PREVENT DAMAGE TO THE PARTS.
13. Assemble the exhaust system on the engine as applicable.
NOTE
Refer to the latest revision of Lycoming Service Instruction No. SI-1562 for exhaust system
installation guidelines.
14. Refer to the pre-disassembly photo or sketch. Attach each exhaust pipe to the corresponding cylinder
head each with a new flange gasket, new washers, and new self-locking nuts. Do not fully torque the
self-locking nuts.
ISSUED  REVISED  PAGE NO.  REVISION
MO  DAY  YEAR  MO  DAY  YEAR
07  24  14  10  10  14  9 of 12  A  S.B. 614

### Page 10 (OCR)

15. Make sure there are no gaps at pipe connections and all pipes are correctly aligned before the final
torque of the fasteners.
NOTE
The V-band coupling at the exhaust transition must be correctly aligned. Incorrect alignment
of the V-band coupling at the exhaust transition is an indication that the exhaust system is not
correctly installed. If the V-band coupling does not align, adjust the exhaust system
components until the V-band coupling is in correct alignment. A slight adjustment to the
turbocharger orientation also can be made to correct the V-band coupling alignment.
16. After validation of the alignment and configuration of the exhaust pipes, slide the V-band coupling
with a new gasket over the exhaust pipe for intercylinder number 5 and exhaust transition assembly
connection. Press the V-band coupling on the flanges.
17. Complete final torques to ensure all fasteners are torqued:
A. Torque the V-band coupling at the exhaust pipe for intercylinder number 5 and exhaust transition
assembly connection to 85 in.-Ib. (10 Nm). Refer to the latest revision of Lycoming Service
Instruction No. SI-1238 for Assembly and Torque Procedures for V-Band Couplings.
B. Torque the nuts that attach the new turbocharger mounting bracket (Figure 6) to the oil sump to
30 ft.-Ibs. (40.7 Nm).
C. Torque the self-locking nuts that attach the exhaust transition assembly (Figure 6) to the
turbocharger to 30 ft.-Ibs. (40.7 Nm).
D. Torque the nut that attaches the exhaust transition assembly to the turbocharger mounting
bracket (Figure 6) to 30 ft.-Ibs. (40.7 Nm).
E. Torque the nuts that attach the exhaust pipes to the cylinders (Figure 3) to 96 in.-lb. (11 Nm) -on
all cylinders.
18. Remove the caps from the three hoses. Connect one hose to the turbocharger (Figure 7 - View A)
and the other two hoses to the turbo oil drain tank (Figure 7).
19. Lubricate the inside of the hose for the air intake tube with engine oil mixture (15% pre-lubricant
(STP or equivalent) and 85% SAE 50 mineral-base aviation-grade lubricating oil) and connect the
air intake tube to the turbocharger (Figure 6). Torque the clamps to 35 in.-lb. (4 Nm).
20. Install the V-band coupling and new gasket at the exhaust bypass valve and exhaust transition
assembly connection. Torque the V-band coupling to 85 in.-Ib. (9.6 Nm).
21. Install the exhaust system end of the cable assembly (Figure 5) with a bolt and new self-locking nut.
Torque the nut to 96 in.-Ib. (10.9 Nm).
22. Refer to the airframe manufacturer's maintenance manual and reinstall all airframe components
previously removed to gain access to the Lycoming exhaust system.
23. Record replacement of turbocharger mounting bracket, any corrective action, and compliance with
this Service Bulletin in the engine logbook.
ISSUED  REVISED  PAGE NO.  REVISION
MO  DAY  YEAR  MO  DAY  YEAR
10 of 12  A  S.B. 614
07  24  14  10  10  14

### Page 11 (OCR)

Warranty Instructions and Replacement Parts for Engines/Parts Affected by Service Bulletin No. 614
1. Contact an Authorized Lycoming Distributor to order the replacement parts listed below.
Parts Necessary for Required Action
Part Name  Lycoming Part Number  Qty.
BRACKET. Turbo mounting  07A22265
NUT, 3/8-24 self-locking  MS20500-624
LOCKPLATE  LW-12291  1
GASKET, Exhaust flange  LW-18234  12
GASKET, V-band coupling, 2-1/4 tube  78246  1
WASHER, 1/4 plain  AN960C416  24
NUT, 1/4-20 self-locking  STD-2044  25
GASKET, V-band coupling, 2-1/4 tube  75845
WASHER, No. 10 internal lock  STD-251
Additional Parts That Could be Necessary Based on Results of Inspection
Cylinder Kit  05K22680
ADAPTER, Exhaust pipe, cyl. no.  40G22384
PIPE, Exhaust, inter. cyl. no. 5  40B22267
FLANGE, Exhaust manifold  40C22381
ADAPTER, Exhaust pipe, cyl. no.4  40G22384
PIPE, Exhaust, cyl. no. I  40B22190
PIPE, Exhaust, cyl. no. 2  40B22318
PIPE, Exhaust. cyl. no. 3  40B22621
PIPE, Exhaust, left, cyl. no. 4  40B22379
PIPE, Exhaust, cyl. no. 5  40B22193
PIPE, Exhaust, left, cyl. no. 6  40B22380
PIPE, Exhaust, cyl. no. 1 with EGT probe hole*  40B23387
PIPE, Exhaust, cyl. no. 2 with EGT probe hole*
PIPE, Exhaust. cyl. no. 3 with EGT probe hole*
PIPE, Exhaust, cyl. no. 4 with EGT probe hole*
PIPE, Exhaust, cyl. no. 5 with EGT probe hole*
PIPE, Exhaust, cyl. no. 6 with EGT probe hole*
* For use with Cessna OEM G1000 EGT Indication Systems only.
2. Upon receipt, complete the installation procedure.
3. Return the removed turbocharger mounting bracket P/N 07A22265 and any cracked or damaged
exhaust system components to Lycoming Engines through the same Authorized Lycoming
Distributor that ordered the replacement turbo mounting bracket P/N 07A22265 and file a warranty
claim for:
A. Reimbursement of the replacement parts.
B. Associated Freight.
C. Removal and Reinstallation Labor Allowance of not more than 8 hours.
If you have any questions, contact Lycoming Field Service by phone at 570-327-7222 or 877-839-7878.
NOTE
Warranty consideration is available for 12 months from the date of issue of this Service
Bulletin.
ISSUED  REVISED  PAGE NO.  REVISION
MO  DAY  YEAR  MO  DAY  YEAR  11 of 12  A  S.B. 614
07  24  14  10  10  14

### Page 12 (OCR)

Exhaust System Inspection/Assembly Checklist
Engine Serial Number:  Date of Inspection
Hours of engine service:  Inspection done by:
Task  Findings/Corrective Action
Use a 10x power magnifying glass to examine
the weld joints of the exhaust pipe for cylinder
#3. Give special attention to the saddle
reinforced weld joint (Figures 8 and 9).
Examine the studs that attach the exhaust pipe
on the #2 cylinder for any indication that they
have pulled away from the cylinder head.
Examine the exhaust transition assembly
(Figure 3), its flange, and slip joints for cracks,
bulges, dents, or residue.
Complete a visual inspection on the entire
exhaust system for any signs of leaks,
distortion, or damage. Examine closely at all
weld joints.
Clean the exhaust system with approved
solvents. Remove carbon or exhaust residue off
of slip joint mating surfaces with a red Scotch-
Brite  pad or equivalent abrasive pad.
Apply a uniform coating of Loctite® C5-A®
anti-seize or equivalent to the slip joint mating
surfaces, assemble the exhaust pipes at the slip
joints and test for freedom of movement.
Replace the turbocharger mounting bracket.
Return the removed turbocharger mounting
bracket and any cracked or damaged exhaust
system components to Lycoming Engines.
ISSUED  REVISED  PAGE NO  REVISION
MO  DAY  YEAR  MO  DAY  YEAR
12 of 12  A  S.B. 614
07  24  14  10  10  14

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