Detailed Visual Inspection of the Hydraulic Pipes [CFMB]

TASK 78-31-49-220-041-A
Detailed Visual Inspection of the Hydraulic Pipes

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

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)

B. 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

C. 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 78-31-49-000-001-B	Removal of the Left or Right Inner Supply Pipe of the Door-Opening Actuator
TASK 78-31-49-000-002-B	Removal of the Lock-Out Bolt Storage Bracket
TASK 78-31-49-000-003-B	Removal of the Upper Swivel Joints
TASK 78-31-49-000-004-B	Removal of the Hydraulic Line Upper, Double and Lower Brackets
TASK 78-31-49-000-006-B	Removal of the Lower Swivel Joints
TASK 78-31-49-000-007-B	Removal of the Interface Bracket, HCU Bracket and Hydraulic Line Middle Bracket
TASK 78-31-49-000-008-B	Removal of the Lower Head Supply Hose
TASK 78-31-49-000-009-B	Removal of the Lower Rod Supply Hose
TASK 78-31-49-000-025-A	Removal of the Rod Supply Pipe of the Right Actuator
TASK 78-31-49-000-026-A	Removal of the Head Supply Pipe of the Right Actuator
TASK 78-31-49-000-027-A	Removal of the Upper Head Supply Hose
TASK 78-31-49-000-028-A	Removal of the Head Supply Junction Pipe
TASK 78-31-49-000-029-A	Removal of the Left or Right Supply Pipe of the Door-Opening Actuator
TASK 78-31-49-000-040-C	Removal of the Rod Supply Junction Pipe
TASK 78-31-49-000-041-A	Removal of the Return Pipe of the Left Latch
TASK 78-31-49-000-042-A	Removal of the Upper Supply Pipe of the Left Latch
TASK 78-31-49-000-043-A	Removal of the Lower Supply Pipe of the Left Latch
TASK 78-31-49-000-044-A	Removal of the Lower Supply Pipe of the Right Latch
TASK 78-31-49-000-045-A	Removal of the Upper Supply Pipe of the Right Latch
TASK 78-31-49-000-046-A	Removal of the Return Pipe of the Right Latch
TASK 78-31-49-000-047-A	Removal of the Upper Rod Supply Hose
TASK 78-31-49-000-048-A	Removal of the Rod Supply Pipe of the Left Actuator
TASK 78-31-49-000-049-A	Removal of the Head Supply Pipe of the Left Actuator
TASK 78-31-49-400-001-B	Installation of the Left or Right Inner Supply Pipe of the Door-Opening Actuator
TASK 78-31-49-400-002-B	Installation of the Lock-Out Bolt Storage Bracket
TASK 78-31-49-400-003-B	Installation of the Upper Swivel Joints
TASK 78-31-49-400-004-B	Installation of the Hydraulic Line Upper, Double and Lower Brackets
TASK 78-31-49-400-006-B	Installation of the Lower Swivel Joints
TASK 78-31-49-400-007-B	Installation of the Interface Bracket, HCU Bracket and Hydraulic Line Middle Bracket
TASK 78-31-49-400-008-B	Installation of the Lower Head Supply Hose
TASK 78-31-49-400-009-B	Installation of the Lower Rod Supply Hose
TASK 78-31-49-400-025-A	Installation of the Rod Supply Pipe of the Right Actuator
TASK 78-31-49-400-026-A	Installation of the Head Supply Pipe of the Right Actuator
TASK 78-31-49-400-027-A	Installation of the Upper Head Supply Hose
TASK 78-31-49-400-028-A	Installation of the Head Supply Junction Pipe
TASK 78-31-49-400-029-A	Installation of the Left or Right Supply Pipe of the Door-Opening Actuator
TASK 78-31-49-400-040-C	Installation of the Rod Supply Junction Pipe
TASK 78-31-49-400-041-A	Installation of the Return Pipe of the Left Latch
TASK 78-31-49-400-042-A	Installation of the Upper Supply Pipe of the Left Latch
TASK 78-31-49-400-043-A	Installation of the Lower Supply Pipe of the Left Latch
TASK 78-31-49-400-044-A	Installation of the Lower Supply Pipe of the Right Latch
TASK 78-31-49-400-045-A	Installation of the Upper Supply Pipe of the Right Latch
TASK 78-31-49-400-046-A	Installation of the Return Pipe of the Right Latch
TASK 78-31-49-400-047-A	Installation of the Upper Rod Supply Hose
TASK 78-31-49-400-048-A	Installation of the Rod Supply Pipe of the Left Actuator
TASK 78-31-49-400-049-A	Installation of the Head Supply Pipe of the Left Actuator
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
Forward Frame of the Half Door

3. Job Set-up
Subtask 78-31-49-941-077-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 78-31-49-010-110-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 an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

Subtask 78-31-49-040-102-A ** ON A/C NOT FOR ALL

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

Subtask 78-31-49-010-111-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser cowl 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 78-31-49-210-052-A ** ON A/C NOT FOR ALL

A. Do a visual inspection of the hydraulic pipes as follows:

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Do the inspection of the pipes for:
A.Crack	No crack permitted	If there is a crack, replace the pipe. (Ref. AMM TASK 78-31-49-000-041) and (Ref. AMM TASK 78-31-49-400-041) or (Ref. AMM TASK 78-31-49-000-042) and (Ref. AMM TASK 78-31-49-400-042) or (Ref. AMM TASK 78-31-49-000-043) and (Ref. AMM TASK 78-31-49-400-043) or (Ref. AMM TASK 78-31-49-000-044) and (Ref. AMM TASK 78-31-49-400-044) or (Ref. AMM TASK 78-31-49-000-045) and (Ref. AMM TASK 78-31-49-400-045) or (Ref. AMM TASK 78-31-49-000-046) and (Ref. AMM TASK 78-31-49-400-046) or (Ref. AMM TASK 78-31-49-000-048) and (Ref. AMM TASK 78-31-49-400-048) or (Ref. AMM TASK 78-31-49-000-049) and (Ref. AMM TASK 78-31-49-400-049) or (Ref. AMM TASK 78-31-49-000-025) and (Ref. AMM TASK 78-31-49-400-025) or (Ref. AMM TASK 78-31-49-000-026) and (Ref. AMM TASK 78-31-49-400-026) or (Ref. AMM TASK 78-31-49-000-028) and (Ref. AMM TASK 78-31-49-400-028) or (Ref. AMM TASK 78-31-49-000-029) and (Ref. AMM TASK 78-31-49-400-029) or (Ref. AMM TASK 78-31-49-000-001) and (Ref. AMM TASK 78-31-49-400-001) or (Ref. AMM TASK 78-31-49-000-040) and (Ref. AMM TASK 78-31-49-400-040)
B.Local collapse	-Two defects maximum per each 11.8 in. (300 mm) - 0.98 in. (24.9 mm) minimum separation between defects -10 percent maximum depth - 0.07 in. (1.8 mm) minimum radius at bottom of defect	If the defect is above maximum , replace the pipe. (Ref. AMM TASK 78-31-49-000-041) and (Ref. AMM TASK 78-31-49-400-041) or (Ref. AMM TASK 78-31-49-000-042) and (Ref. AMM TASK 78-31-49-400-042) or (Ref. AMM TASK 78-31-49-000-043) and (Ref. AMM TASK 78-31-49-400-043) or (Ref. AMM TASK 78-31-49-000-044) and (Ref. AMM TASK 78-31-49-400-044) or (Ref. AMM TASK 78-31-49-000-045) and (Ref. AMM TASK 78-31-49-400-045) or (Ref. AMM TASK 78-31-49-000-046) and (Ref. AMM TASK 78-31-49-400-046) or (Ref. AMM TASK 78-31-49-000-048) and (Ref. AMM TASK 78-31-49-400-048) or (Ref. AMM TASK 78-31-49-000-049) and (Ref. AMM TASK 78-31-49-400-049) or (Ref. AMM TASK 78-31-49-000-025) and (Ref. AMM TASK 78-31-49-400-025) or (Ref. AMM TASK 78-31-49-000-026) and (Ref. AMM TASK 78-31-49-400-026) or (Ref. AMM TASK 78-31-49-000-028) and (Ref. AMM TASK 78-31-49-400-028) or (Ref. AMM TASK 78-31-49-000-029) and (Ref. AMM TASK 78-31-49-400-029) or (Ref. AMM TASK 78-31-49-000-001) and (Ref. AMM TASK 78-31-49-400-001) or (Ref. AMM TASK 78-31-49-000-040) and (Ref. AMM TASK 78-31-49-400-040)
C.Nick, gouge and scratch	Maximum depth 10 percent of wall thickness	If the defect is not allowable, replace the pipe. (Ref. AMM TASK 78-31-49-000-041) and (Ref. AMM TASK 78-31-49-400-041) or (Ref. AMM TASK 78-31-49-000-042) and (Ref. AMM TASK 78-31-49-400-042) or (Ref. AMM TASK 78-31-49-000-043) and (Ref. AMM TASK 78-31-49-400-043) or (Ref. AMM TASK 78-31-49-000-044) and (Ref. AMM TASK 78-31-49-400-044) or (Ref. AMM TASK 78-31-49-000-045) and (Ref. AMM TASK 78-31-49-400-045) or (Ref. AMM TASK 78-31-49-000-046) and (Ref. AMM TASK 78-31-49-400-046) or (Ref. AMM TASK 78-31-49-000-048) and (Ref. AMM TASK 78-31-49-400-048) or (Ref. AMM TASK 78-31-49-000-049) and (Ref. AMM TASK 78-31-49-400-049) or (Ref. AMM TASK 78-31-49-000-025) and (Ref. AMM TASK 78-31-49-400-025) or (Ref. AMM TASK 78-31-49-000-026) and (Ref. AMM TASK 78-31-49-400-026) or (Ref. AMM TASK 78-31-49-000-028) and (Ref. AMM TASK 78-31-49-400-028) or (Ref. AMM TASK 78-31-49-000-029) and (Ref. AMM TASK 78-31-49-400-029) or (Ref. AMM TASK 78-31-49-000-001) and (Ref. AMM TASK 78-31-49-400-001) or (Ref. AMM TASK 78-31-49-000-040) and (Ref. AMM TASK 78-31-49-400-040)
D.Local distorsion of pipe section	-Twice the original diameter maximum length -10 percent maximum variation of original contour	If defect is above maximum, replace the pipe. (Ref. AMM TASK 78-31-49-000-041) and (Ref. AMM TASK 78-31-49-400-041) or (Ref. AMM TASK 78-31-49-000-042) and (Ref. AMM TASK 78-31-49-400-042) or (Ref. AMM TASK 78-31-49-000-043) and (Ref. AMM TASK 78-31-49-400-043) or (Ref. AMM TASK 78-31-49-000-044) and (Ref. AMM TASK 78-31-49-400-044) or (Ref. AMM TASK 78-31-49-000-045) and (Ref. AMM TASK 78-31-49-400-045) or (Ref. AMM TASK 78-31-49-000-046) and (Ref. AMM TASK 78-31-49-400-046) or (Ref. AMM TASK 78-31-49-000-048) and (Ref. AMM TASK 78-31-49-400-048) or (Ref. AMM TASK 78-31-49-000-049) and (Ref. AMM TASK 78-31-49-400-049) or (Ref. AMM TASK 78-31-49-000-025) and (Ref. AMM TASK 78-31-49-400-025) or (Ref. AMM TASK 78-31-49-000-026) and (Ref. AMM TASK 78-31-49-400-026) or (Ref. AMM TASK 78-31-49-000-028) and (Ref. AMM TASK 78-31-49-400-028) or (Ref. AMM TASK 78-31-49-000-029) and (Ref. AMM TASK 78-31-49-400-029) or (Ref. AMM TASK 78-31-49-000-001) and (Ref. AMM TASK 78-31-49-400-001) or (Ref. AMM TASK 78-31-49-000-040) and (Ref. AMM TASK 78-31-49-400-040)
E.Hydraulic leakage	No leakage permitted	If there is leakage, examine the nipples and coupling nuts for correct torque. (Ref. AMM TASK 78-31-49-400-041) or (Ref. AMM TASK 78-31-49-400-042) or (Ref. AMM TASK 78-31-49-400-043) or (Ref. AMM TASK 78-31-49-400-044) or (Ref. AMM TASK 78-31-49-400-045) or (Ref. AMM TASK 78-31-49-400-046) or (Ref. AMM TASK 78-31-49-400-048) or (Ref. AMM TASK 78-31-49-400-049) or (Ref. AMM TASK 78-31-49-400-025) or (Ref. AMM TASK 78-31-49-400-026) or (Ref. AMM TASK 78-31-49-400-028) or (Ref. AMM TASK 78-31-49-400-029) or (Ref. AMM TASK 78-31-49-400-001) or (Ref. AMM TASK 78-31-49-400-040)
		If the leakage continues, replace the pipe. (Ref. AMM TASK 78-31-49-000-041) and (Ref. AMM TASK 78-31-49-400-041) or (Ref. AMM TASK 78-31-49-000-042) and (Ref. AMM TASK 78-31-49-400-042) or (Ref. AMM TASK 78-31-49-000-043) and (Ref. AMM TASK 78-31-49-400-043) or (Ref. AMM TASK 78-31-49-000-044) and (Ref. AMM TASK 78-31-49-400-044) or (Ref. AMM TASK 78-31-49-000-045) and (Ref. AMM TASK 78-31-49-400-045) or (Ref. AMM TASK 78-31-49-000-046) and (Ref. AMM TASK 78-31-49-400-046) or (Ref. AMM TASK 78-31-49-000-048) and (Ref. AMM TASK 78-31-49-400-048) or (Ref. AMM TASK 78-31-49-000-049) and (Ref. AMM TASK 78-31-49-400-049) or (Ref. AMM TASK 78-31-49-000-025) and (Ref. AMM TASK 78-31-49-400-025) or (Ref. AMM TASK 78-31-49-000-026) and (Ref. AMM TASK 78-31-49-400-026) or (Ref. AMM TASK 78-31-49-000-028) and (Ref. AMM TASK 78-31-49-400-028) or (Ref. AMM TASK 78-31-49-000-029) and (Ref. AMM TASK 78-31-49-400-029) or (Ref. AMM TASK 78-31-49-000-001) and (Ref. AMM TASK 78-31-49-400-001) or (Ref. AMM TASK 78-31-49-000-040) and (Ref. AMM TASK 78-31-49-400-040)
2.Do the inspection of the hydraulic hoses for:
A.Damage	No damage permitted	If you find some damage, replace hydraulic hose. (Ref. AMM TASK 78-31-49-000-047) and (Ref. AMM TASK 78-31-49-400-047) or (Ref. AMM TASK 78-31-49-000-027) and (Ref. AMM TASK 78-31-49-400-027) or (Ref. AMM TASK 78-31-49-000-008) and (Ref. AMM TASK 78-31-49-400-008) or (Ref. AMM TASK 78-31-49-000-009) and (Ref. AMM TASK 78-31-49-400-009)
B.Hydraulic leakage	No leakage permitted	If there is leakage, examine the nipples and the coupling nuts for correct torque. (Ref. AMM TASK 78-31-49-400-047) or (Ref. AMM TASK 78-31-49-400-027) or (Ref. AMM TASK 78-31-49-400-008) or (Ref. AMM TASK 78-31-49-400-009)
3.Examine the swivel joints for:
A.Damage	No damage permitted	If you find some damage, replace the swivel joint. (Ref. AMM TASK 78-31-49-000-003) and (Ref. AMM TASK 78-31-49-400-003) or (Ref. AMM TASK 78-31-49-000-006) and (Ref. AMM TASK 78-31-49-400-006).
B.Hydraulic leakage	No leakage permitted	If there is leakage, examine the nipples for correct torque. (Ref. AMM TASK 78-31-49-400-003) or (Ref. AMM TASK 78-31-49-400-006).
		If the leakage continues, replace the packing. (Ref. AMM TASK 78-31-49-000-003) and (Ref. AMM TASK 78-31-49-400-003) or (Ref. AMM TASK 78-31-49-000-006) and (Ref. AMM TASK 78-31-49-400-006).
		If the leakage continues, replace the swivel joint. (Ref. AMM TASK 78-31-49-000-003) and (Ref. AMM TASK 78-31-49-400-003) or (Ref. AMM TASK 78-31-49-000-006) and (Ref. AMM TASK 78-31-49-400-006).
4.Examine the line brackets and the related hardware for:
A.Damage	No damage permitted	If you find some damage, replace the defective part. (Ref. AMM TASK 78-31-49-000-002) and (Ref. AMM TASK 78-31-49-400-002) or (Ref. AMM TASK 78-31-49-000-004) and (Ref. AMM TASK 78-31-49-400-004) or (Ref. AMM TASK 78-31-49-000-007) and (Ref. AMM TASK 78-31-49-400-007).

5. Close-up
Subtask 78-31-49-410-086-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 cowl 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 78-31-49-440-078-A ** ON A/C NOT FOR ALL

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

Subtask 78-31-49-410-087-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).

[Rev.10 from 2021] 2026.04.01 03:25:28 UTC