General Visual Inspection of Hydraulic Tubing and Hoses (Blocker Doors Deployed) [CFMB]

TASK 78-31-49-210-002-B
General Visual Inspection of Hydraulic Tubing and Hoses (Blocker Doors Deployed)

1. Reason for the Job
Refer to the MPD TASK: 783100-C4
TBD
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 78-31-49-000-003-B	Removal of the Upper Swivel Joints
TASK 78-31-49-000-006-B	Removal of the Lower Swivel Joints
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 78-31-49-400-003-B	Installation of the Upper Swivel Joints
TASK 78-31-49-400-006-B	Installation of the Lower Swivel Joints
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
CMM 710017
Forward Frame of the Half Door

3. Job Set-up
Subtask 78-31-49-941-090-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 78-31-49-010-125-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 78-31-49-040-106-A ** ON A/C NOT FOR ALL

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

Subtask 78-31-49-010-126-A ** ON A/C NOT FOR ALL

D. Open the thrust-reverser cowl doors to 33 degree or 35 degree position (as applicable) (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 78-31-49-210-053-A ** ON A/C NOT FOR ALL

A. Do a visual inspection of the hydraulic tubing and hoses as follows:

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Do the inspection of the hoses for:
A.Damage	No damage permitted	Remove and replace (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.Firesleeves cuts, tears, chafing	Any number provided maximum depth does not exceed one half of sleeve thickness.	Remove and replace (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). Repair CMM 710017.
C.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)
		If the leakage continues, replace the 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)
2.Do the inspection of the hydraulic pipes for:
A.Damage	No damage permitted	If you find some damage, replace the defective part. (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.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).
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) (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 78-31-49-000-006) and (Ref. AMM TASK 78-31-49-400-006) or (Ref. AMM TASK 78-31-49-000-003) and (Ref. AMM TASK 78-31-49-400-003)
		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).

5. Close-up
Subtask 78-31-49-410-101-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 78-31-49-440-091-A ** ON A/C NOT FOR ALL

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

Subtask 78-31-49-410-102-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 03:25:29 UTC