Removal of the Vent Door

TASK 52-31-22-000-001-A
Removal of the Vent Door

CAUTION: IMMEDIATELY AFTER YOU OPEN THE CARGO COMPARTMENT DOOR, RECORD ON THE WORK CARD ON THE DOOR, THE DATE AND TIME WHEN YOU OPENED IT. IF THE CARGO COMPARTMENT DOOR STAYS OPEN FOR 12 HOURS OR MORE, YOU MUST BLEED THE HYDRAULIC SYSTEM RELATED TO IT. IF YOU DO NOT OBEY THESE PRECAUTIONS, THE DOOR CAN CLOSE SUDDENLY WHEN YOU SET THE DOOR TO "CLOSE". THIS CAN CAUSE DAMAGE TO THE DOOR AND TO THE AIRCRAFT STRUCTURE.

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 4M (13 FT)-ADJUSTABLE
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Referenced Information

REFERENCE	DESIGNATION
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-31-13-000-001-A	Removal of the Lining and the Insulation
Vent Door ** ON A/C NOT FOR ALL
Vent Door ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 52-31-22-010-050-A

A. Get Access
(1) Open the FWD cargo-compartment door (referred to as cargo door) and safety it with the actuator safety locks (Ref. AMM TASK 52-30-00-860-001).
(2) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the opened cargo door.
(3) Remove the lining and insulation from the inner side of the cargo door to get access to the vent door mechanism (Ref. AMM TASK 52-31-13-000-001).

Subtask 52-31-22-865-050-A

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
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
122VU	DOORS/CARGO	1MJ	T12
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

4. Procedure
Subtask 52-31-22-020-052-C ** ON A/C NOT FOR ALL

A. Removal of the Vent Door

Vent Door ** ON A/C NOT FOR ALL

(1) Remove the nuts (21), the bolts (18) and the washers (19) and disconnect the cover (20) from the brackets of the cargo door.
(2) Remove the connection rod (13) from the vent door (10) as follows:
(a) Remove and discard the cotter pin (17) from the nut (16).
(b) Remove the nut (16), the washers (15),(12), the bush (14) and the bolt (11) from the actuator arm.
(c) Disconnect the connection rod (13) from the actuator arm.
(3) Remove and discard the cotter pins (1) from the nuts (2).
(4) Remove the nuts (2), the washers (3),(4) and the sleeve (5) from the bolts (8).
(5) Hold the vent door (10) and remove the washers (3) and the bolts (8) from the hinge arms of the vent door.

NOTE: Remove the vent door carefully because the springs (6) and (7) are installed under load.

(6) Remove the springs (6),(7) from the spring bolts (21) and the fittings of the vent door frame.
(7) Remove the vent door (10) and the shim set of washers (4) from the hinge brackets of the vent door frame.
(8) Remove the sleeve (9) from the upper hinge arm of the vent door (10).

Subtask 52-31-22-020-052-D ** ON A/C NOT FOR ALL

A. Removal of the Vent Door

Vent Door ** ON A/C NOT FOR ALL

(1) Remove the bolts (18), the washers (19) and disconnect the cover (20) from the brackets of the cargo door.
(2) Remove the connection rod (13) from the vent door (10) as follows:
(a) Remove and discard the cotter pin (17) from the nut (16).
(b) Remove the nut (16), the washers (15),(12), the bush (14) and the bolt (11) from the actuator arm.
(c) Disconnect the connection rod (13) from the actuator arm.
(3) Remove and discard the cotter pins (1) from the nuts (2).
(4) Remove the nuts (2), the washers (3),(4) and the sleeve (5) from the bolts (8).
(5) Hold the vent door (10) and remove the washers (3) and the bolts (8) from the hinge arms of the vent door.

NOTE: Remove the vent door carefully because the springs (6) and (7) are installed under load.

[Rev.10 from 2021] 2026.04.02 07:23:03 UTC