Removal of the Left or Right Half Door of Thrust Reverser [CFMB]

TASK 78-32-11-000-002-A
Removal of the Left or Right Half Door of Thrust Reverser

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

CAUTION: THIS PART IS A REMOVABLE STRUCTURAL COMPONENT (RSC), WHICH CAN BE MOVED BETWEEN AIRCRAFT. THUS IT CAN HAVE DIFFERENT OPERATION CONDITIONS AND A DIFFERENT LIFE RECORD (FLIGHT HOURS/FLIGHT CYCLES/CALENDAR) FROM THE AIRCRAFT IT IS INSTALLED ON OR REMOVED FROM. THE OPERATOR IS RESPONSIBLE FOR THE SPECIFIC TRACKING AND CONTINUED AIRWORTHINESS OF REMOVABLE STRUCTURAL COMPONENTS. INCORRECT MAINTENANCE OF THESE COMPONENTS CAN CAUSE A RISK FOR THE FLIGHT SAFETY.

ZONE: 400
FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job

NOTE: Interferences between the LPTACC Inlet Airscoop assy and the Thrust reverser cowl have been observed in production on a limited number of A320 Family aircraft powered with CFM56-5B/3 engines. CFM has issued SB CFM56-5B S/B 75-0044. In order to recover the gap between the LPTACC scoop and the Thrust reverser cowl to avoid potential interference, Airbus recommends to incorporate this SB at the opportunity of Thrust Reverser Cowl Removal/Installation.

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	CAP - BLANKING
No specific	AR	COVER - PROTECTION
No specific	AR	DRIFT - COPPER, SOFT
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	STRAP - ATTACHMENT
No specific	AR	STRAP - LIFTING
No specific	AR	WARNING NOTICE(S)
HIX1001	1	SLING,HANDLING
HIX3001	1	WORKSTAND-MOBILE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.12ABE2)	Corrosion Preventive Compound-Water Displacing Oily Film System

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-11-000-041-A	Removal of the Fan Cowl Doors
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-51-000-041-A	Removal of the Thrust Reverser Half Door Opening Actuator
Hydraulic Blanking Caps
Thrust Reverser Electrical Harness
Thrust Reverser Hinge Pins Access
Handling Sling and Hoist Points on Reverser Half Door
Hoist Points on Reverser Half Door
Opened and Closed Positions of Hold-Open rods
Thrust Reverser Half-Door on the Mobile Workstand

3. Job Set-up
Subtask 78-32-11-941-052-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 78-32-11-865-050-A ** ON A/C NOT FOR ALL

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 78-32-11-869-052-A ** ON A/C NOT FOR ALL

C. Make sure that:

the slats and flaps are retracted,
the throttle control levers are at idle (0 degree)

Subtask 78-32-11-941-055-A ** ON A/C NOT FOR ALL

D. Put a WARNING NOTICE(S) on the slats and flaps control levers to prohibit use of them.

Subtask 78-32-11-010-056-A ** ON A/C NOT FOR ALL

E. 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 78-32-11-040-053-A ** ON A/C NOT FOR ALL

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

Subtask 78-32-11-614-050-A ** ON A/C NOT FOR ALL

G. Depressurization of the Hydraulic Reservoirs.

WARNING: FAILURE TO SHUT OFF AIRCRAFT HYDRAULIC SUPPLY TO THRUST REVERSER CAN RESULT IN SERIOUS INJURY TO PERSONNEL.

(1) For engine 1 depressurize the Green hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
(2) For engine 2 depressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).

Subtask 78-32-11-010-057-A ** ON A/C NOT FOR ALL

H. Remove left or right fan cowl (Ref. AMM TASK 71-13-11-000-041).

4. Procedure
Subtask 78-32-11-010-058-A ** ON A/C NOT FOR ALL

A. Removal of the Left or Right Thrust Reverser Half Door
(1) Disconnect the interface hydraulic hoses from the left or right half door.
(2) Install PLUG - BLANKING on nipples.

Hydraulic Blanking Caps ** ON A/C NOT FOR ALL

(3) For the right side only disconnect the hydraulic supply pipe from the HCU.
(4) Disconnect the right electrical harness connector from the electrical junction box.

Thrust Reverser Electrical Harness ** ON A/C NOT FOR ALL

(5) Disconnect the electrical harness connectors (4100KS-A and 4100KS-B) from the electrical junction box.
(6) Put CAP - BLANKING on the electrical connectors.
(7) Remove the 13 screws that attach the hinge access panel to the pylon.

Thrust Reverser Hinge Pins Access ** ON A/C NOT FOR ALL

(8) Put the HIX1001 SLING,HANDLING on the half door as follows:

Handling Sling and Hoist Points on Reverser Half Door ** ON A/C NOT FOR ALL

Hoist Points on Reverser Half Door ** ON A/C NOT FOR ALL

CAUTION: THE STOPS ON THE SCREWS MUST TOUCH THE 12 O'CLOCK BEAM. IF THE SCREWS ON THE LIFTING BEAM ARE NOT FULLY IN THE HOIST POINT, THE HALF DOOR COULD FALL. IF THE HALF DOOR FALLS IT CAN BE DAMAGED.

(a) Remove and keep the hoist plugs from the two upper hoist points.
(b) Install the handling sling on the two upper hoist points of the half door.
(c) Remove and keep the hoist plug from the lower hoist point on the middle lower fitting.
(d) Install the STRAP - LIFTING to the lower hoist point on the middle lower fitting. Hook the other end of the lifting strap to the hook on the winch above.
(9) Apply lubricant to the hinge bolts and nuts to make them easier to remove.

Thrust Reverser Hinge Pins Access ** ON A/C NOT FOR ALL

(a) Spray Corrosion Preventive Compound-Water Displacing Oily Film System (Material No.12ABE2) to the hing pins and nut, 3 places.
(b) Allow the lubricant to go into the nuts and bolts to loosen and make them easier to remove.
(10) Open the right and left half doors.

WARNING: YOU MUST HOLD EACH HALF DOOR OPENED WITH THE HOLD-OPEN ROD TO PREVENT SERIOUS INJURY DUE TO ACCIDENTAL CLOSURE.

CAUTION: PROTECT THE ENGINE PARTS MADE OF TITANIUM OR TITANIUM ALLOYS FROM CONTACT WITH HYDRAULIC FLUID. HYDRAULIC FLUID IS CORROSIVE AND CAUSES DAMAGE TO TITANIUM.

(a) Open the right and left half doors to the 35 degrees position (Ref. AMM TASK 78-36-00-010-040).
(11) Put a COVER - PROTECTION over the core engine to make sure that hydraulic fluid does not drop on the compressor case.
(12) Remove the left or right door-opening actuators (Ref. AMM TASK 78-36-51-000-041).
(13) Install PLUG - BLANKING on the hydraulic pipe.

Hydraulic Blanking Caps ** ON A/C NOT FOR ALL

(14) Apply tension to the HIX1001 SLING,HANDLING to keep half door in position.
(15) Put the hold-open rod in closed position.

Opened and Closed Positions of Hold-Open rods ** ON A/C NOT FOR ALL

(16) Remove quick release pin from attachment bracket on the half door.
(17) Move the half door to the 10 degrees position.
(18) Remove the three hinge pins which attach the half door as follows:

Thrust Reverser Hinge Pins Access ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE HALF DOOR IS NOT DAMAGED WHEN REMOVED.

CAUTION: THE HALF DOOR WEIGHS APPROXIMATELY 440 POUNDS (200 KG). MAKE SURE THAT THE CRANE CAN LIFT 440 POUNDS (200 KG). HOWEVER, THE FORCE USED TO LIFT THE HALF DOOR SHOULD NOT BE MORE THAN 661 POUNDS (300 KG). IF THE LIFTING FORCE IS TOO MUCH THE SCREWS IN THE LIFTING BEAM CAN BREAK AND THE HALF DOOR WILL FALL AND BE DAMAGE.

(a) Remove and discard the cotter pin (10).
(b) Remove the nuts and the washers.
(c) Remove the hinge pins with a DRIFT - COPPER, SOFT.
(19) Carefully lift the half door from the engine pylon.
(20) Install the thrust reverser half door on the HIX3001 WORKSTAND-MOBILE as follows:

Thrust Reverser Half-Door on the Mobile Workstand ** ON A/C NOT FOR ALL

(a) Remove the two hinge pins from the mobile workstand.
(b) Move the half door to the 45 degrees position with the handling sling.
(c) Put the half door in a position to align the hinges with the hinges of the mobile workstand.
(d) Install the hinge pins through the hinges of the half door and the mobile workstand and install the cotter pins.
(21) Remove the handling sling from the half door. Re-install the plugs in the top two hoist points and keep the plug from the lower hoist point.

Handling Sling and Hoist Points on Reverser Half Door ** ON A/C NOT FOR ALL

Hoist Points on Reverser Half Door ** ON A/C NOT FOR ALL

(22) Install the STRAP - ATTACHMENT on the lower hoist point of the half door.

[Rev.10 from 2021] 2026.04.01 03:25:48 UTC