Detailed Visual Inspection of the electrical Harness [CFMB]

TASK 78-31-42-210-041-A
Detailed Visual Inspection of the electrical Harness

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Inspection of the thrust reverser wiring when installed or removed.
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	PLIERS - NOSE, SOFT, LONG
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP1039)	acetone
(Material No.CP1041)	isopropyl alcohol
(Material No.CP2011)	stoddard solvent
(Material No.CP2559)	ardrox 552
(Material No.CP2560)	turco ind 79
(Material No.CP2566)	mag-chem teksol
(Material No.CP2584)	degreasol 99 R
(Material No.CP2656)	mag-chem skysol
(Material No.14SBA1)	Textile-Lint free Cotton -

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-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-31-00-710-042-A	Operational Test of the Thrust Reverser System
TASK 78-31-00-710-043-A	Operational Test of the Thrust Reverser without CFDS - Engine Not Running
TASK 78-31-00-710-043-A-01	Operational Test of the Thrust Reverser without CFDS - Engine Running
TASK 78-31-42-000-043-A	Removal of the Left Electrical Harness
TASK 78-31-42-000-044-A	Removal of the Right Electrical Harness
TASK 78-31-42-400-043-A	Installation of the Left Electrical Harness
TASK 78-31-42-400-044-A	Installation of the Right Electrical Harness
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors

3. Job Set-up
Subtask 78-31-42-941-053-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 78-31-42-010-056-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 78-31-42-040-053-A ** ON A/C NOT FOR ALL

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

Subtask 78-31-42-010-057-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser doors: (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 78-31-42-020-053-A ** ON A/C NOT FOR ALL

A. Disconnect the thrust reverser harness electrical connectors.

Subtask 78-31-42-210-050-A ** ON A/C NOT FOR ALL

B. Do a visual inspection of the electrical connectors as follows :

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Do the inspection of the electrical connector for:
A.Crossed thread	No crossed thread permitted	if there is crossed thread, replace the electrical harness (Ref. AMM TASK 78-31-42-000-043) or (Ref. AMM TASK 78-31-42-000-044) and (Ref. AMM TASK 78-31-42-400-043) or (Ref. AMM TASK 78-31-42-400-044)
B.Nick, dent in thread	The thread must not be completely removed by the nick or dent	If the thread is completely removed, replace the electrical harness . (Ref. AMM TASK 78-31-42-000-043) or (Ref. AMM TASK 78-31-42-000-044) and (Ref. AMM TASK 78-31-42-400-043) or (Ref. AMM TASK 78-31-42-400-044)
C.Broken pin	No broken pin permitted	If there is a broken pin, replace the electrical harness (Ref. AMM TASK 78-31-42-000-043) or (Ref. AMM TASK 78-31-42-000-044) and (Ref. AMM TASK 78-31-42-400-043) or (Ref. AMM TASK 78-31-42-400-044)
D.Bent pin	No bent pin permitted	if you find a bent pin, make it straight with connector tool.
E.Bend, cracked, or bulged connector	No defects permitted	If you find a defect, replace the electrical harness (Ref. AMM TASK 78-31-42-000-043) or (Ref. AMM TASK 78-31-42-000-044) and (Ref. AMM TASK 78-31-42-400-043) or (Ref. AMM TASK 78-31-42-400-044)
F.Dirt	No dirt permitted inside the connector	If the connector is dirty, clean it with a Textile-Lint free Cotton - (Material No.14SBA1) and isopropyl alcohol (Material No.CP1041) or acetone (Material No.CP1039) or stoddard solvent (Material No.CP2011) or ardrox 552 (Material No.CP2559) or turco ind 79 (Material No.CP2560) or mag-chem teksol (Material No.CP2566) or degreasol 99 R (Material No.CP2584) or mag-chem skysol (Material No.CP2656) .

Subtask 78-31-42-420-053-A ** ON A/C NOT FOR ALL

C. Connect the electrical connectors. Tighten the connectors with your hand, then tighten one-eighth turn more with PLIERS - NOSE, SOFT, LONG

Subtask 78-31-42-210-051-A ** ON A/C NOT FOR ALL

D. Do a visual inspection of the electrical harness as follows:

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Do the inspection of the electrical harness for:
A.Damage	No damage permitted	If you find some damage, replace the electrical harness (Ref. AMM TASK 78-31-42-000-043) or (Ref. AMM TASK 78-31-42-000-044) and (Ref. AMM TASK 78-31-42-400-043) or (Ref. AMM TASK 78-31-42-400-044)
2.Do the inspection of the switch connectors for:
A.Tightness	The blue mark of all the switch connectors must be covered by the blue mark of the electrical connector	If the blue mark of a switch connector can be seen, tighten the connector with the PLIERS - NOSE, SOFT, LONG.
3.Do the inspection of clamps for:
A.Missing or loose hardware	No missing clamps or loose hardware permitted	Replace missing hardware or clamps. Tighten loose clamp connections (Ref. AMM TASK 78-31-42-400-043) or (Ref. AMM TASK 78-31-42-400-044)
4.Do the inspection of the sheath of the electrical harness for:
A.Damage	No damage permitted	If you find some damage, replace electrical harness (Ref. AMM TASK 78-31-42-000-043) or (Ref. AMM TASK 78-31-42-000-044) and (Ref. AMM TASK 78-31-42-400-043) or (Ref. AMM TASK 78-31-42-400-044)

5. Close-up
Subtask 78-31-42-410-056-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors: (Ref. AMM TASK 78-36-00-410-040).
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(3) Remove the access platform(s).

Subtask 78-31-42-440-053-A ** ON A/C NOT FOR ALL

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

Subtask 78-31-42-410-057-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).

Subtask 78-31-42-710-050-A ** ON A/C NOT FOR ALL

D. Do an operational test of the thrust reverser system from the CFDS (Ref. AMM TASK 78-31-00-710-042)

NOTE: As an alternative procedure, you can do this operational test without the CFDS (Ref. AMM TASK 78-31-00-710-043).

[Rev.10 from 2021] 2026.04.01 03:24:38 UTC