Special Detailed Inspection (TC) of Aft Engine Mount Pylon Bolts [CFMI]

TASK 71-22-11-210-803-A
Special Detailed Inspection (TC) of Aft Engine Mount Pylon Bolts

1. Reason for the Job
Refer to the MPD TASK: 712211-05
SPECIAL DETAILED INSPECTION (TC) OF AFT ENGINE MOUNT PYLON BOLTS
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	INSTALLATION TOOL - CABLE TERMINATOR BERGEN BM327 TYPE
No specific	AR	WARNING NOTICE(S)
98D27803500001	1	LOCKING TOOL ZERO POS
98D71203002002	1	CHEST TORQUE SET NM - CFM56-5 ENGINE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP8002)	lockwire 0.032 in. (0.8 mm) dia
(Material No.CP8006)	safety cable 0.032 in. (0.8 mm) dia.

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-22-11-000-802-A	Removal of the Aft Engine Mount Bolts One at a Time
TASK 71-22-11-400-802-A	Installation of the Aft Engine Mount Bolts One at a Time
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
Aft Engine Mount
Aft Engine Mount Safety Wire
Tool Adaptor

3. Job Set-up
Subtask 71-22-11-860-057-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
(4) Make sure that the slats are retracted and install the 98D27803500001 LOCKING TOOL ZERO POS on the flap and slat control lever.

Subtask 71-22-11-010-084-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 71-22-11-040-066-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser is unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 71-22-11-010-112-A ** ON A/C NOT FOR ALL

D. Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure
Subtask 71-22-11-210-072-A ** ON A/C NOT FOR ALL

A. Do a TORQUE Check of the Aft Engine Mount Pylon Bolts

CAUTION: ONLY CHECK ONE BOLT A TIME.

(1) Cut and remove the lockwire or safety cable from the bolt (155).
(2) Check the torque of the aft mount bolt using the 98D71203002002 CHEST TORQUE SET NM - CFM56-5 ENGINE.
(a) Check the TORQUE value of the bolt (155) is to 384 lbf.ft (52.06 m.daN).
1 If using tool adaptor P/N 98D71203002208 with the angle of 22.5 degrees: set the torque wrench to 360.8 lbf.ft (48.92 m.daN) to check the required TORQUE value 384 lbf.ft (52.06 m.daN).
2 If using tool adaptor P/N 98D71203002208 with the angle of 67.5 degrees: set the torque wrench to 368.8 lbf.ft (50.00 m.daN) to check the required TORQUE value 384 lbf.ft (52.06 m.daN).
(3) If the bolts (155) turn and the torque value is less than the required torque value, all four bolts (155), washers (160), barrel nuts (170) and retainers (175) must be discarded (Ref. AMM TASK 71-22-11-000-802) and (Ref. AMM TASK 71-22-11-400-802).

CAUTION: YOU CAN USE SAFETY CABLE OR SAFETY WIRE TO SAFETY THE BOLTS. YOU MUST INSTALL THE SAFETY WIRE OR THE CABLE TIGHTLY. IF YOU DO NOT OBEY THIS PRECAUTION, DAMAGE TO THE PYLON CAN OCCUR.

(4) Safety of the bolts

Aft Engine Mount ** ON A/C NOT FOR ALL

(a) Safety each bolt (155) with CP8006safety cable 0.032 in. (0.8 mm) dia. or CP8002lockwire 0.032 in. (0.8 mm) dia or safetywire 0.047in. (1.2 mm) dia., MS20995C47.
1 Use INSTALLATION TOOL - CABLE TERMINATOR BERGEN BM327 TYPE for safety cable AMS5689.

NOTE: Safety cable terminator tool (BM series) Bergen Cable Technology or DMC Safe-T-Cable Tool & Parts Kit, Daniels Manufacturing Corporation are to be used.

NOTE: When you use safety cable at aft mount, you must install a filler washer from the safety cable supplier to avoid ferrule to go through the aft mount beam hole.

5. Close-up
Subtask 71-22-11-410-086-A ** ON A/C NOT FOR ALL

A. Close the thrust reverser cowl doors (Ref. AMM TASK 78-36-00-410-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 71-22-11-440-063-A ** ON A/C NOT FOR ALL

B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 71-22-11-410-087-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(5) Remove the WARNING NOTICE(S).
(6) On the panel 114VU remove the locking tool from the flap and slat control lever.

[Rev.10 from 2021] 2026.04.01 02:23:01 UTC