Subtask 32-21-17-941-050
 B. Safety Precautions
 (1) In the cockpit, on the panel 400VU put warning notice(s) in position to tell persons not to operate the landing gear control lever.
 (2) Put warning notice(s) in position to tell persons not to pressurize the Green hydraulic system: - on the panel 40VU in the cockpit, - on the ground service panel of the Green hydraulic system, access door (197CB).
 (3) Put the safety barriers in position.
 (4) Obey the applicable safety precautions before you open the LGCIU circuit breakers (Ref. TASK 32-00-00-860-001). 
R  **ON A/C 401-499, 
R  Subtask 32-21-17-860-050-A 
R  A. Aircraft Maintenance Configuration 
R R R  (1) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration. (Ref. TASK 29-00-00-864-001) 
R R  (2) Depressurize the reservoir of the Yellow hydraulic system. (Ref. TASK 29-14-00-614-001) 
R  (3) Lift the aircraft with jacks (Ref. TASK 07-11-00-581-003). 
R  Subtask 32-21-17-941-050-A 
R  B. Safety Precautions 
R R  (1) In the cockpit, on the panel 400VU put warning notice(s) in position to tell persons not to operate the landing gear control lever. 
R R R R R  (2) Put warning notice(s) in position to tell persons not to pressurize the Yellow hydraulic system: - on the panel 40VU in the cockpit, - on the ground service panel of the Yellow hydraulic system, access door (196BB).

R  (3) Put the safety barriers in position. 
R R  (4) Obey the applicable safety precautions before you open the LGCIU circuit breakers (Ref. TASK 32-00-00-860-001). 
R  **ON A/C ALL
 Subtask 32-21-17-865-053
 C. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU HYDRAULIC/LGCIU/SYS1/GRND SPLY 52GA Q34
 Subtask 32-21-17-010-050
 D. Get Access
 (1) Open the doors of the nose landing gear (Ref. TASK 32-22-00-010-001).
 (2) Put an access platform in position below the lockstay assembly in zone 123.
 4. Procedure_________
 (Ref. Fig. 401/TASK 32-21-17-991-001)
 Subtask 32-21-17-020-051
 A. Removal of the Lockstay Assembly
 (1) Remove the lock springs. (Ref. TASK 32-21-18-000-001)
 (2) Remove the proximity sensors 18GA and 19GA. (Ref. TASK 32-31-73-000-005)
 (3) Remove the nut (31), the washer (30) and the screw (26). Release the clamps (27) and (28) from the bracket (29). (Ref. Fig. 401/TASK 32-21-17-991-001)
 (4) Remove and discard the cotter pin (12). Remove the nut (13) and the washer (14).

 NLG Lockstay Assy Figure 401/TASK 32-21-17-991-001
 1EFF : 1 1R 1CES  ALL  1 11 1 32-21-17 Page 405 Aug 01/05

 (5)
 Pull the bolt (24) and release the actuator (15). Remove the washer (16).

 (6)
 Remove and discard the cotter pin (22). Remove the nut (21) and the washer (20).

 (7)
 Remove the bolt (17), the washer (18) and disengage the lockstay assy

 (23) from the drag strut.
 NOTE : Make sure that the lockstay assy does not hit the gear leg.

____
 (8)
 Remove and discard the cotter pin (6). Remove the nut (7) and the washer (5).

 (9)
 Remove the screw (1), the bushing (4) and the washer (2).

 (10)
 Remove the ring (3) and release the actuator (8) from the pin (10).

 (11)
 Remove the pin (10) with the EXTRACTOR (J47558). Remove the washer

 (25) and the spacer (11).

 (12)
 Remove the lockstay assy (23).

R (13) Remove the GROUND SAFETY LOCK (D23080000) or PIN-NLG DOWNLOCK SAFETY R (MZ23080000) as an alternative.
 1EFF : ALL 1 32-21-17Page 406 1 1 Aug 01/05 1 1 1CES 1

 TASK 32-21-17-400-001 Installation of the NLG Lockstay Assy WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______
 GEAR.

 WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE
_______
 CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.

 WARNING : MAKE SURE THAT THE CONTROLS AGREE WITH THE POSITION OF THE ITEMS THEY
_______
 OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM.

 WARNING : MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE
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