Adjustment of the Door Opening Angle

TASK 52-31-11-820-004-A
Adjustment of the Door Opening Angle

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	CLINOMETER
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	Torque wrench: range to between 1.35 and 1 m.daN (119.47 and 88.50 lbf.in )
No specific	Torque wrench: range to between 14.5 and 12.5 m.daN (106.93 and 92.18 lbf.ft )
98D52307524000	1	STRUT-SUPPORT,CARGO DOORS

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
81	COTTER PINS	AIPC 52-36-02-03-080
81	COTTER PINS	AIPC 52-36-82-03-080

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-005-A	Open the FWD or Aft Cargo-Compartment Door with the Crane
Adjustment of Door Opening Angle

3. Job Set-up
Subtask 52-31-11-010-063-A

A. Get Access
(1) Open the cargo door (Ref. AMM TASK 52-30-00-860-001).
(2) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at the cargo door.

Subtask 52-31-11-865-058-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 52-31-11-820-059-A

A. Adjustment of the Door Opening Angle
(1) Close the cargo door (Ref. AMM TASK 52-30-00-860-001).
(2) Hold the CLINOMETER in position at the actuator attachment fitting with the cargo door in the locked position.
(3) Measure and write down the number of degrees.
(4) Open the cargo door to a vertical position (Ref. AMM TASK 52-30-00-860-001).
(5) Disconnect the eye-ends (93) of both door actuator (90) as follows:
(a) Remove the nuts (89), the washers (87), the bolts (86) and the bonding jumpers (88) from the eye-end (93).
(b) If necessary, remove and discard the cotter pin (81) from the bolt (85).
(c) Remove the nut (82) and the washers (83) from the bolt (85).
(d) Support the door actuators (90) and remove the bolt (85) with the washer (84) from the door fitting.
(e) Disconnect the eye-end (93) from the actuator attachment fitting.
(6) Open the cargo door with the crane to an opening angle of 136 deg (Ref. AMM TASK 52-30-00-860-005) .
(7) Install the 98D52307524000 STRUT-SUPPORT,CARGO DOORS to safety the opened cargo door.

Make sure that the length of each support strut is correctly adjusted so that the related pip pin goes in freely into the cargo door.

(8) Carefully extend the pistons of the door actuators and make sure that they are mechanically locked (Ref. AMM TASK 52-30-00-860-001).

Make sure that the pistons of the door actuators do not damage the aircraft structure.

(9) Make sure that the bore of the eye-ends (93) are align with the bore of the actuator attachment fitting.

NOTE: The bores are align if the bolt (85) goes in freely.

(10) If not, adjust the length of the door actuators (90) as follows:
(a) Cut and remove the lockwire from the locking devices (91) and the nuts (92).
(b) Loosen the nuts (92).
(c) Turn the eye-end (93) until you can install the bolt (85) freely.

Make sure that the bonding angle at the eye-end (93) show downside.

(d) If you cannot install the bolt (85) freely, turn the piston rod (90) as required to install the bolt (85) freely (fine adjustment).
(e) Install the bolts (85) with the washers (84) in the actuator attachment fitting.

Make sure that the bolt (85) goes in freely.

(11) Install the washers (83) and the nuts (82) on the bolt (85).
(12) Remove the 98D52307524000 STRUT-SUPPORT,CARGO DOORS and disconnect the crane from the cargo door.
(13) Close and lock the cargo door (Ref. AMM TASK 52-30-00-860-002).

Make sure that the two door actuators disengage at the same time.

(14) Measure the distance 'a' on the door actuator (90).

Make sure that the distance 'a' is more than 7.6 mm (0.2992 in.).

(15) Open the cargo door (Ref. AMM TASK 52-30-00-860-001) and make sure that the door opening angle is correct.
(16) If the door opening angle is less then 135 deg. adjust the length of the both door actuator as follows:

NOTE: A full rotation (360 deg.) of piston rod (90) increases the opening angle to 1 deg.

(a) Close the cargo door until it is in the vertical position.
(b) Turn the piston rod (90) of both door actuators with the same quantity of rotation to get the correct opening angle.
(c) Open the cargo door and make sure that the door opening angle is between 135 deg. and 136 deg.
(17) TORQUE the nut (92) to between 14.5 and 12.5 m.daN (106.93 and 92.18 lbf.ft )

.
(18) Safety the nuts (92) and the locking devices (91) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(19) TORQUE the nuts (82) to between 1.35 and 1 m.daN (119.47 and 88.50 lbf.in )

and safety it with the new AIPC 52-36-02-03-080 COTTER PINS (81) or AIPC 52-36-82-03-080 COTTER PINS (81).
(20) Install the bolts (86), the washers (87), the bonding jumpers (88) and the nuts (89) on the eye-end (93). (Ref. AMM TASK 20-28-00-912-802).

5. Close-up
Subtask 52-31-11-865-059-A

A. Remove the safety clip(s) and the tag(s) and close 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

Subtask 52-31-11-410-061-A

B. Close Access
(1) Close and lock the cargo door (Ref. AMM TASK 52-30-00-860-002).
(2) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.02 07:23:00 UTC