Detailed Inspection of Gear Uplock and Door Uplock Units and Rollers

TASK 32-31-00-200-001-A
Detailed Inspection of Gear Uplock and Door Uplock Units and Rollers

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.

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

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

ZONE: 711
ZONE: 731
ZONE: 741

1. Reason for the Job
Refer to the MPD TASK: 323100-02
DETAILED INSPECTION OF GEAR UPLOCK AND DOOR UPLOCK UNITS AND ROLLERS.
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	SAFETY BARRIER(S)
No specific	1	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
711	NOSE GEAR
731	L.H MAIN GEAR
741	R.H MAIN GEAR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 32-00-00-081-002-A	Removal of the Safety Devices from the Landing Gear Doors
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-00-00-481-002-A	Installation of the Safety Devices on the Landing Gear Doors
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
TASK 32-22-00-010-001-A	Nose Gear Doors - Ground Doors Opening
TASK 32-22-00-410-001-A	Nose Gear Doors - Ground Doors Closing
CMM 321132
CMM 321181
CMM 321210
CMM 321216
CMM 321220
CMM 321223
CMM 321279
CMM 321286
CMM 322722
CMM 323133
CMM 323133
CMM 323144
CMM 323144
CMM 323701
CMM 323708
CMM 323709
CMM 528111
CMM 528112
CMM 528113
CMM 528114
CMM 528116
CMM 528118
CMM 528120
CMM 528121
CMM 528122
CMM 528123
CMM 528125
MLG Uplocks, Door Uplocks and Pins
NLG Uplock, Door Uplock and Rollers

3. Job Set-up
Subtask 32-31-00-941-054-A

A. Safety Precautions
(1) Put the SAFETY BARRIER(S) in position.
(2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On the panel 400VU:

make sure that the landing-gear control-lever 6GA is in the DOWN position
put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear.

Subtask 32-31-00-010-051-A

B. Get Access
(1) Open the NLG doors (Ref. AMM TASK 32-22-00-010-001).
(2) Open the MLG doors (Ref. AMM TASK 32-12-00-010-001).
(3) Make sure that the safety devices are installed on the landing gear doors (Ref. AMM TASK 32-00-00-481-002).
(4) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position:

For the MLG, below zones 731 and 741
For the NLG, below zone 711.

Subtask 32-31-00-110-053-A

C. Clean the Inspection Area
(1) Use a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean and dry:

the areas to be examined around the MLG uplocks, door uplocks and pins
the areas to be examined around the NLG uplock, door uplock and rollers.

4. Procedure
Subtask 32-31-00-210-050-A

A. Detailed Inspection of the Gear Uplock and the Door Uplock Units and the Rollers
(1) Do an inspection of the MLG uplocks and the door uplocks as follows:
(a) Examine the MLG uplocks, the door uplocks and their related mounting brackets for damage, cracks and corrosion.
(b) Examine the uplock hooks and the guide plates for damage, cracks and corrosion.
(c) Examine the protective finish for damage.
(d) Make sure that the MLG uplocks, the door uplocks and their related mounting brackets are correctly installed and safetied.
(e) Examine the hydraulic connections to the uplock actuator assemblies for damage and oil leaks.
(f) Examine the strut assemblies for damage, cracks and corrosion.
(g) Make sure that the strut assemblies are correctly installed and safetied.
(h) Examine the proximity sensors to make sure they are correctly installed and safetied.
(i) Examine the proximity sensor cables and the electrical connectors for damage and make sure they are correctly installed.
(j) Examine the identification plates and labels on the MLG uplocks and the door uplocks to make sure they are correctly installed.
(k) Make sure the bonding straps are correctly installed.
(2) Do an inspection of the MLG leg and the door uplock pins as follows:

NOTE: To get access to the MLG leg uplock pins, it can be necessary to move the access platform.

(a) Examine the MLG leg uplock pins and the adjacent area for damage, wear, cracks and corrosion.
(b) Examine the protective finish of the MLG leg uplock pins and the adjacent area for cracks and corrosion.
(c) Examine the MLG door uplock pins for damage, wear, cracks and corrosion.
(d) Make sure that the uplock-pin mounting brackets are correctly installed.
(e) Examine the MLG door around the uplock-pin mounting brackets for delamination of the door structure, damage and cracks.
(3) Do an inspection of the NLG uplock and door uplock as follows:
(a) Examine the NLG uplock, door uplock and their related mounting brackets for damage, cracks and corrosion.
(b) Examine the uplock hooks for wear.
(c) Examine the protective finish for damage.
(d) Make sure that the NLG uplock, the door uplock and their related mounting brackets are correctly installed and safetied.
(e) Examine the hydraulic connections to the uplock actuator-assemblies for damage and oil leaks.
(f) Examine the proximity sensors to make sure they are correctly installed and safetied.
(g) Examine the proximity sensor cables and electrical connectors for damage and make sure they are correctly installed.
(h) Examine the identification plates and labels on the NLG uplock and the door uplocks to make sure they are correctly installed.

NOTE: It is only possible to examine the identification plates and labels on the uplocks with the part numbers that follow:

On the NLG uplock Part No. C24730001-8 and subsequent
On the door uplock Part No. C24730100-2 and subsequent.

(4) Do an inspection of the NLG uplock roller and the door uplock roller as follows:
(a) Examine the NLG uplock roller and the door uplock roller for signs of damage, wear, cracks and corrosion.
(b) Examine the protective finish of the drag strut assembly and the forestay for damage, cracks and corrosion.
(c) Examine the bellcrank mountings, the uplock rollers and shouldered bushes for damage, cracks, dents, wear and corrosion.
(5) If damage is found, refer to the CMMs that follow for the damage limits and the repair procedures:

For the MLG uplock CMM 323144 Or CMM 323144
For the MLG door uplock CMM 323133 Or CMM 323133
For the NLG uplock CMM 323708
For the NLG door uplock CMM 323709
For the MLG leg uplock pin, refer to the applicable MLG leg CMM CMM 321132, CMM 321181, CMM 321216, CMM 321210, CMM 321220, CMM 321223, CMM 321279, CMM 321286
For the MLG door uplock pin, refer to the applicable MLG door CMM CMM 528111, CMM 528112, CMM 528113, CMM 528114, CMM 528116, CMM 528118, CMM 528120, CMM 528121, CMM 528122, CMM 528123, CMM 528125
For the NLG uplock roller, refer to the applicable NLG forestay CMM CMM 323701, CMM 322722.

5. Close-up
Subtask 32-31-00-410-051-A

A. Close Access
(1) Remove the safety devices from the landing gear doors (Ref. AMM TASK 32-00-00-081-002).
(2) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).
(3) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).

Subtask 32-31-00-942-052-A

B. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the SAFETY BARRIER(S).
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:44:13 UTC