W DOC AIRBUS | AMM A320F

Visual Inspection of the Engine Wiring Harness [CFML]

TASK 73-21-60-200-801-A
Visual Inspection of the Engine Wiring Harness

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
ZONE: 210
ZONE: 400
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
210
CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
400
POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 71-13-00-010-803-A
Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A
Closing of the Fan Cowl Doors
TASK 73-21-60-000-804-A
Removal of the HJ3A Engine Wiring Harness
TASK 73-21-60-000-805-A
Removal of the HJ3B Engine Wiring Harness
TASK 73-21-60-000-808-A
Removal of the HJ5A Engine Wiring Harness
TASK 73-21-60-000-809-A
Removal of the HJ5B Engine Wiring Harness
TASK 73-21-60-000-810-A
Removal of the HJ6A Engine Wiring Harness
TASK 73-21-60-000-811-A
Removal of the HJ6B Engine Wiring Harness
TASK 73-21-60-000-812-A
Removal of the HJ7 Engine Wiring Harness
TASK 73-21-60-000-813-A
Removal of the HJ8A Engine Wiring Harness
TASK 73-21-60-000-814-A
Removal of the HJ8B Engine Wiring Harness
TASK 73-21-60-300-802-A
Repair of the Engine Wiring Harness in the Harness Firewall Area
TASK 73-21-60-340-801-A
Application of Silicone Tape (68N and 69N) Patch for Protection of the Branch
TASK 73-21-60-400-804-A
Installation of the HJ3A Engine Wiring Harness
TASK 73-21-60-400-805-A
Installation of the HJ3B Engine Wiring Harness
TASK 73-21-60-400-808-A
Installation of the HJ5A Engine Wiring Harness
TASK 73-21-60-400-809-A
Installation of the HJ5B Engine Wiring Harness
TASK 73-21-60-400-810-A
Installation of the HJ6A Engine Wiring Harness
TASK 73-21-60-400-811-A
Installation of the HJ6B Engine Wiring Harness
TASK 73-21-60-400-812-A
Installation of the HJ7 Engine Wiring Harness
TASK 73-21-60-400-813-A
Installation of the HJ8A Engine Wiring Harness
TASK 73-21-60-400-814-A
Installation of the HJ8B Engine Wiring Harness
TASK 78-30-00-040-809-A
Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A
Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-806-A
Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A
Closing of the Thrust Reverser Cowl Doors
F Visual Inspection of the Engine Wiring Harness
3. Job Set-up
Subtask 73-21-60-941-081-A
A. Safety Precautions
   (1) On the center pedestal, on ENG panel 115VU:
     (a) Make sure that the ENG/MODE selector switch is in the NORM position.
     (b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
     (c) Put WARNING NOTICE(S) in position to tell persons not to operate:
  • The ENG/MODE selector switch
  • The ENG/MASTER 1(2) control switch.
   (2) On the ENG section of maintenance panel 50VU:
     (a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
     (b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 73-21-60-010-096-A
B. Get Access
   (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
   (2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 73-21-60-040-062-A
C. Deactivation of the Thrust Reverser System for Ground Maintenance
WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
   (1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-809).
Subtask 73-21-60-010-097-A
D. Get Access
   (1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
4. Procedure
Subtask 73-21-60-210-055-A
A. Visual Inspection of the Engine Wiring Harnesses HJ3A (1), HJ3B (2), HJ5A (3), HJ5B (4), HJ6A (5), HJ6B (6), HJ7 (7), HJ8A (8) and HJ8B (9)
   (1) Do the visual inspection of the engine wiring harnesses HJ3A (1), HJ3B (2), HJ5A (3), HJ5B (4), HJ6A (5), HJ6B (6), HJ7 (7), HJ8A (8) and HJ8B (9) for the indications as follows:
     (a) Do the visual inspection of identification sleeve (10) for:
INSPECT/CHECK
MAXIMUM SERVICEABLE LIMITS
REMARKS
Chafing, burn, cut, removed characters
Serviceable even if reading is not possible but component needs to be replaced at the next shop visit.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Looseness
Serviceable but component needs to be replaced at the next shop visit.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
     (b) Do the visual inspection of identification plate (11) for:
INSPECT/CHECK
MAXIMUM SERVICEABLE LIMITS
REMARKS
Burn, cut
Serviceable even if reading is not possible but component needs to be replaced at the next shop visit.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Looseness
Serviceable but component needs to be replaced at the next shop visit.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Removed characters
Serviceable even if reading is not possible but component needs to be replaced at the next shop visit.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Chafing
Serviceable even if reading is not possible but component needs to be replaced at the next shop visit.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
     (c) Do the visual inspection of connector (13) and metallic parts (backshell, transition) for:
INSPECT/CHECK
MAXIMUM SERVICEABLE LIMITS
REMARKS

1. Examine connectors for:


Worn masterkey
Not serviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Signs of short-circuit, carbonizing
Not serviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Nick, dent, scratches (locking ring of the connector)
Serviceable if below:
  • 0.08 in. (2.0 mm) long,
  • 0.04 in. (1.0 mm) wide,
  • 0.012 in. (0.3 mm) deep.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Scratches
Serviceable if below:
  • 0.012 in. (0.3 mm) deep.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Nicks, dents
Serviceable if below:
  • 0.08 in. (2.0 mm) long,
  • 0.04 in. (1.0 mm) wide,
  • 0.012 in. (0.3 mm) deep.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Nicks, dents (on connector thread)
Serviceable if the receptacle can be manually tightened until covering the color line of the receptacle without pitch lock.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Marking partially erased
Serviceable even if reading is not possible but component needs to be replaced at the next shop visit.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Interfacial face deteriorated
Not serviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Cut, looseness, deformated (connector RFI ring)
Not serviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Bad connector assembly
Not serviceable. Must cover the blue line on the receptacle.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
2. Examine backshell for:


Scratches
Serviceable if:
  • 0.012 in. (0.3 mm) deep.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Nicks, dents (backshell)
Serviceable if:
  • 0.08 in. (2.0 mm) long,
  • 0.04 in. (1.0 mm) wide,
  • 0.012 in. (0.3 mm) deep.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
3. Examine mechanical parts for:


Marking partially erased (connector and metallic parts)
Serviceable even if reading is not possible but component needs to be replaced at the next shop visit.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
4. Examine stainless steel clamps for:


Cut, looseness
Not serviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
     (d) Do the visual inspection of external heat-shrinkable tubing (15) and (17) for:
INSPECT/CHECK
MAXIMUM SERVICEABLE LIMITS
REMARKS
Burn, chafing, deformation
Serviceable if external tubing is not perforated.
See repair (Ref. AMM TASK 73-21-60-340-801).
Preforation, cut
Not serviceable.
See repair (Ref. AMM TASK 73-21-60-340-801).
Looseness
Not serviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Glue
Serviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Mark, deformation (heat-shrinkable parts, bobbin)
Serviceable if not perforated.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
     (e) Do the visual inspection of copper braid, stainless steel braid and fire protection braid (located at 6 o'clock on the lower bifurcation).
INSPECT/CHECK
MAXIMUM SERVICEABLE LIMITS
REMARKS
Burn, fretting (stainless steel braid)
Not serviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Loose or cut strand (stainless steel braid)
One or two strand loose or broken from the outer braid are permitted. If necessary, cut the strands. Change harness at the next shop visit. Discard the harness if more than two strands are unserviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Mark, deformation (stainless steel braid)
Serviceable.
Burn (copper braid)
Not serviceable.
Repairable limit: Degradation of heat-shrinkable sheath under the copper braid is not permitted.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
See repair (Ref. AMM TASK 73-21-60-300-802).
Radial cut (copper braid)
Not serviceable.
Repairable limit: Degradation of heat-shrinkable sheath under the copper braid is not permitted.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
See repair (Ref. AMM TASK 73-21-60-300-802).
Holes between strands (copper braid)
Serviceable if:
  • Zone 1: No radial nick of the copper braid and no visible heat shrinkable sheath under the copper braid.
  • Zone 2: No radial nick of the copper braid and maximum visible surface of the heat shrinkable sheath must be less than 0.031 in.2 (20.00 mm2). Metallic braid fully maintained at its extremities by the heat shrinkable sleeve.
Repairable limit: Degradation of heat-shrinkable sheath is not permitted.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
See repair (Ref. AMM TASK 73-21-60-300-802).
     (f) Do the visual inspection of contacts (18) for:
INSPECT/CHECK
MAXIMUM SERVICEABLE LIMITS
REMARKS
Signs of wear, arcing or carbonizing
Not serviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Distortion
Not serviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Missing or retracted
Not serviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
     (g) Do the visual inspection of connector receptacle counter plate (19).
INSPECT/CHECK
MAXIMUM SERVICEABLE LIMITS
REMARKS
Cracks, distortion
Not serviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Damaged fasteners
Not serviceable.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
Scratches, dents, nicks
Serviceable if nicks, dents or scratches are less than 0.011 in. (0.28 mm). The component is to be replaced at the next shop visit.
Replace the applicable engine wiring harness
(Ref. AMM TASK 73-21-60-000-804) and (Ref. AMM TASK 73-21-60-400-804),
(Ref. AMM TASK 73-21-60-000-805) and (Ref. AMM TASK 73-21-60-400-805),
(Ref. AMM TASK 73-21-60-000-808) and (Ref. AMM TASK 73-21-60-400-808),
(Ref. AMM TASK 73-21-60-000-809) and (Ref. AMM TASK 73-21-60-400-809),
(Ref. AMM TASK 73-21-60-000-810) and (Ref. AMM TASK 73-21-60-400-810),
(Ref. AMM TASK 73-21-60-000-811) and (Ref. AMM TASK 73-21-60-400-811),
(Ref. AMM TASK 73-21-60-000-812) and (Ref. AMM TASK 73-21-60-400-812),
(Ref. AMM TASK 73-21-60-000-813) and (Ref. AMM TASK 73-21-60-400-813),
(Ref. AMM TASK 73-21-60-000-814) and (Ref. AMM TASK 73-21-60-400-814).
5. Close-up
Subtask 73-21-60-410-074-A
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
Subtask 73-21-60-440-056-A
B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-809).
Subtask 73-21-60-410-075-A
C. Close Access
   (1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
   (2) Remove the access platform(s).
   (3) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 03:05:38 UTC
"Aviabrain" 2025