Installation of the Locking Shaft Assembly

TASK 52-31-21-400-011-A
Installation of the Locking Shaft Assembly

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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.

ZONE: 825

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	Torque wrench: range to between 4.8 and 3.7 m.N (42.48 and 32.74 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03HBD9)	Synthetic Ester base Grease-General Purpose Low Temp -
(Material No.06AAB1)	Polysulfide Sealant-General Purpose Fillet -
(Material No.12ABB1)	Corrosion Preventive Compound-Water Displacing Hard Film -
(Material No.12ABC1)	Corrosion Preventive Compound_Water Displacing Soft Film -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
825	FORWARD CARGO COMPARTMENT DOOR
825AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
153	COTTER PIN	AIPC 52-31-21-30-020
164	COTTER PIN	AIPC 52-31-21-30-020
53	COTTER PIN	AIPC 52-31-21-30-150
164	COTTER PIN	AIPC 52-31-21-42-020
53	COTTER PIN	AIPC 52-31-82-40-150
164	COTTER PIN	AIPC 52-31-82-42-020

E. 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 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-31-00-720-001-A	Functional Check of Forward Cargo Compartment Door, Comprising Functional Checks of Locking Mechanism, Interlock Mechanism, Drift Pin Mechanism and Safety Mechanism
TASK 52-31-11-820-002-A	Adjustment of the Door Mechanism
Locking Shaft Assembly ** ON A/C NOT FOR ALL
Locking Shaft Assembly ** ON A/C NOT FOR ALL
Locking Shaft Assembly ** ON A/C NOT FOR ALL
Access Cover and Protection Plugs ** ON A/C NOT FOR ALL
Access Cover and Protection Plugs ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 52-31-21-860-065-A

A. Aircraft Maintenance Configuration
(1) Make sure that the FWD cargo-compartment door (referred to as cargo door) is opened and safetied with the actuator safety locks (Ref. AMM TASK 52-30-00-860-001).
(2) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the opened cargo door.
(3) Make sure that the access panel 825AR is removed from the cargo door.

Subtask 52-31-21-865-078-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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 52-31-21-910-062-A

A. Preparation for Installation
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Apply a layer of Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to all movable parts.

Subtask 52-31-21-420-073-A ** ON A/C NOT FOR ALL

B. Installation of the Locking Shaft Assembly

Locking Shaft Assembly ** ON A/C NOT FOR ALL

(1) Install the locking shaft (148) to the cargo door structure as follows:
(a) Move the locking shaft (148) through the lateral cutout of the cargo door into the sliding bearing of each frame fork end.
(b) During this movement, assemble the lock cams (145), the washers (169) and the drift pin lever (158) in the correct sequence on the locking shaft (148).

NOTE: The washers (169) are installed only at FR25.

(c) Set the lock cams (145) and the drift pin lever (158) in the correct position on the locking shaft (148) (in accordance with your marks).

Make sure that their attachment holes align.

(d) Install the tapered pins (149) to attach the drift pin lever (158) on the locking shaft (148).
(e) Install the sleeves (150), the washers (151) and the nuts (152) on the tapered pins (149).
(f) Assemble the locking shaft lever (56) and the vent door lever (162) on the ends of the locking shaft (148) (in accordance with your mark).
(g) Install the tapered pins (165) to attach the vent door lever (162) on the locking shaft (148).
(h) Install the sleeves (166), the washers (167) and the nuts (168) on the tapered pins (165).
(i) Install the tapered pins (143) to attach the locking shaft lever (52) on the locking shaft (148).
(j) Install the sleeves (142), the washers (141) and the nuts (140) on the tapered pins (143).
(k) Install the Hi-Lok pins (144) to attach the lock cams (145) on the locking shaft (148).
(l) Install the washers (147) and the nuts (146) on the Hi-Lok pins (144).
(m) Tighten the nuts (140), (146), (152) and (168).
(2) Connect the control rod (56) to the locking shaft lever (52) as follows:
(a) Put the lower fork-end of the control rod (56) on locking shaft lever (52) and install the bolt (57), the washers (55) and the nut (54).
(b) Tighten the nut (54) and safety it with the new AIPC 52-31-21-30-150 COTTER PIN (53).
(3) Connect the control rod (156) to the drift pin lever (158) as follows:
(a) Put the fork-end of the control rod (156) to the drift pin lever (158) and install the bolts (157), the washers (155) and the nuts (154).
(b) Tighten the nut (154) and safety it with the new AIPC 52-31-21-30-020 COTTER PIN (153).
(4) Connect the connection rod (159) to the vent door lever (162) as follows:
(a) Put the lower eye end of the connection rod (159) in the fork end of the vent door lever (162).
(b) Install the bolt (160), the washers (161) and the nut (163).
(c) Tighten the nut (163) and safety it with the new AIPC 52-31-21-30-020 COTTER PIN (164).

Subtask 52-31-21-420-073-D ** ON A/C NOT FOR ALL

B. Installation of the Locking Shaft Assembly

Locking Shaft Assembly ** ON A/C NOT FOR ALL

(1) Install the locking shaft (148) at the cargo door structure as follows:
(a) Move the locking shaft (148) through the lateral cutout of the cargo door into the sliding bearing of each frame fork end.
(b) During this movement, assemble the lock cams (145) in the correct sequence on the locking shaft (148).
(c) Refer to the marks you made during the removal procedure:

set the lock cams (145) in its correct position on the locking shaft (148)
assemble the lever (52) and (162) on the locking shaft (148)
make sure that the attachment holes align.

(d) Install the tapered pins (165) to attach the lever (162) on the locking shaft (148).
(e) Install the sleeves (166), the washers (167) and the nuts (168) on the tapered pins (165).
(f) Install the tapered pins (143) to attach the locking shaft lever (52) on the locking shaft (148).
(g) Install the sleeves (142), the washers (141) and the nuts (140) on the tapered pins (143).
(h) Install the Hi-Lok pins (144) to attach the lock cams (145) on the locking shaft (148).
(i) Install the washers (147) and the nuts (146) on the Hi-Lok pins (144).
(j) Tighten the nuts (140), (146) and (168).
(2) Connect the control rod (59) to the locking shaft lever (52) as follows:
(a) Put the lower fork-end of the control rod (59) on locking shaft lever (52) and install the bolt (57), the washers (55) and the nut (54).
(b) Tighten the nut (54) and safety it with the new AIPC 52-31-21-30-150 COTTER PIN (53) or AIPC 52-31-82-40-150 COTTER PIN (53).
(3) Connect the connection rod (159) to the lever (162) as follows:
(a) Put the lower eye-end of the connection rod (159) in the fork-end of the lever (162).
(b) Install the bolt (160), the washers (161) and the nut (163).
(c) Tighten the nut (163) and safety it with the new AIPC 52-31-21-42-020 COTTER PIN (164) or AIPC 52-31-82-42-020 COTTER PIN (164).

Subtask 52-31-21-420-073-E ** ON A/C NOT FOR ALL

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

B. Installation of the Locking Shaft Assembly

Locking Shaft Assembly ** ON A/C NOT FOR ALL

(1) When you connect/install the components, refer to the marks that you made during the removal procedure.
(2) Install the locking shaft (148) on the cargo door:
(a) Move the locking shaft (148) through the lateral cutout of the cargo door into the sliding bearing of each frame fork-end.
(b) During the movement of the locking shaft (148), install the components that follow in the correct sequence:

NOTE: The washers (169) are installed only at FR25.

The locking shaft lever (52)
The vent door lever (162)
The lock cams (145), and
The washers (169).

(c) Make sure that the attachment holes of the components align with the attachment holes of the locking shaft (148).
(d) Install the tapered pins (165), the sleeves (166), the washers (167) and the nuts (168) on the vent door lever (162).
(e) Install the tapered pin (143), the sleeve (142), the washer (141) and the nut (140) on the locking shaft lever (52).
(f) Install the hi-lok pins (144) and the nuts (146) on the lock cams (145).
(g) TORQUE the nuts (140), (146) and (168) to between 4.8 and 3.7 m.N (42.48 and 32.74 lbf.in )

.
(3) Connect the control rod (56) to the locking shaft lever (52):
(a) Put the lower fork-end of the control rod (56) on the locking shaft lever (52).
(b) Install the washers (55), the bolt (57) and the nut (54).
(c) Tighten the nut (54) and safety it with the new AIPC 52-31-82-40-150 COTTER PIN (53).
(4) Connect the connection rod (159) to the vent door lever (162):
(a) Put the lower eye-end of the connection rod (159) on the fork-end of the vent door lever (162).
(b) Install the washers (161), the bolt (160) and the nut (163).
(c) Tighten the nut (163) and safety it with the new AIPC 52-31-82-42-020 COTTER PIN (164).

Subtask 52-31-21-820-060-A ** ON A/C NOT FOR ALL

C. Adjustment Procedure
(1) Adjust the control rod (56) of the linkage mechanism to make sure that the lock cams are in their correct position (Ref. AMM TASK 52-31-11-820-002).
(2) Adjust the length of the control rod (156) to make sure that the drift pins extend and retract correctly. (Ref. AMM TASK 52-31-11-820-002).

Subtask 52-31-21-820-060-B ** ON A/C NOT FOR ALL

C. Adjustment Procedure
(1) Adjust the length of the control rod (59) to make sure that the lock cams (145) are in the correct position (Ref. AMM TASK 52-31-11-820-002).

Subtask 52-31-21-720-059-A

D. Do the functional test of the door mechanism to make sure that the locking mechanism operates correctly (Ref. AMM TASK 52-31-00-720-001).

5. Close-up
Subtask 52-31-21-865-079-A

A. Make sure that this(these) circuit breaker(s) is(are) closed:

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 52-31-21-410-069-A

B. Close Access

Access Cover and Protection Plugs ** ON A/C NOT FOR ALL

(1) Make sure that the work area is clean and clear of tools and other items.
(2) Apply Corrosion Preventive Compound_Water Displacing Soft Film - (Material No.12ABC1) or Corrosion Preventive Compound-Water Displacing Hard Film - (Material No.12ABB1) to all the components of the safety shaft assembly and to the adjacent cargo door structure.
(3) Install the protection plug (6) in the edge member and apply a bead of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) .
(4) Install the access panel 825AR on the cargo door.
(5) Remove the actuator safety locks and close the cargo door (Ref. AMM TASK 52-30-00-860-002).
(6) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.02 06:27:54 UTC