(4)
 Put a warning notice on the GRAVITY GEAR EXTN handle (panel 110VU) to tell persons not to operate the landing gear.

 1EFF : ALL 1 32-30-00Page 202 1 1 Nov 01/98 1 1 1CES 1 1EFF : ALL 1 32-30-00Page 203 1 1 Nov 01/98 1 1 1CES 1 1EFF : ALL 1 32-30-00Page 204 1 1 Feb 01/02 1 1 1CES 1

R R R R  (5) On the panel 400VU: - make sure that the landing-gear control-lever 6GA is in the DOWN position - put a warning notice in position to tell persons not to operate the landing gear.
 (6) Put a warning notice in position to tell persons not to pressurize the Yellow and Green hydraulic systems.
 Subtask 32-30-00-860-055
 B. Aircraft Maintenance Configuration
 (1) Make sure that the Yellow and Green hydraulic systems are de-pressurized (Ref. TASK 29-00-00-864-001) and (Ref. TASK 29-10-00-864-002).
 (2) Disconnect the isolation coupling of the PTU (Ref. TASK 29-23-00-860-001).
 Subtask 32-30-00-582-052
 C. Lift the Aircraft
 (1) Lift the aircraft on jacks (Ref. TASK 07-11-00-581-001).
 Subtask 32-30-00-869-057
 D. Flight Configuration Precautions
 (1) If the electrical power is not necessary for other maintenance tasks, de-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002). Then, it is not necessary to operate the LGCIU circuit breakers.
 (2) If the electrical power is necessary, do the precautions for flight configuration (Ref. TASK 32-00-00-860-001) before you open the LGCIU circuit breakers.
 Subtask 32-30-00-010-053
 E. Get Access
 (1) Open the NLG doors (Ref. TASK 32-22-00-010-001). 
R  (2) Make sure that a SAFETY PIN - NLG DOOR (98D32203502000) is installed in each NLG door (Ref. TASK 32-00-00-481-002).

 (3) Open the MLG doors (Ref. TASK 32-12-00-010-001).
 (4) Make sure that the GROUND LOCK SLEEVE (460005835) is on each MLG door actuating cylinder (Ref. TASK 32-00-00-481-002).
 Subtask 32-30-00-860-058
 F. Aircraft Maintenance Configuration
 (1) Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
 (2) Connect the ground hydraulic cart to the Green and the Yellow hydraulic systems (Ref. TASK 29-10-00-863-001). Do not pressurize the systems.
 4. Procedure_________
 Subtask 32-30-00-867-053 
R  A. Retraction of the Landing Gear for Maintenance
 WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR ARE CLEAR._______ 
R R R  CAUTION : REMOVE THE SAFETY STAY BEFORE YOU DO THE LANDING GEAR EXTENSION_______ AND RETRACTION TESTS. DAMAGE TO THE FUSELAGE CAN OCCUR IF THE AIRCRAFT MOVES DURING THE TESTS. 
R  (1) Remove the safety stay at FR73/74. 
R  (2) Remove the safety lock(s) from the landing gear(s) that is(are) to be retracted: - for the NLG, remove the PIN-NLG DOWNLOCK SAFETY (D23080000) - for the MLG, remove the GROUND LOCK SLEEVE (460005833) or the GROUNDLOCK SLEEVE (460007280). 
R  (3) On the panel 400VU, move the landing-gear control-lever 6GA to the UP position. On the panel 402VU: - the green lights stay on - the red lights come on.
 NOTE : In the paragraphs that follow, only the lights that change are____ given.

R (4) Use the handpump on the hydraulic cart to retract the applicable

 landing gear(s):
 -
the related green light(s) go(es) off

 -
the red lights stay on.

R (5) When the applicable landing gear(s) is(are) retracted:
 -the related red light(s) go(es) off.
 NOTE : If more than one landing gear is to be retracted, you can use
____ the electric pump on the hydraulic cart.
 5. Close-up
________
 Subtask 32-30-00-860-053
 A. Aircraft Configuration
 (1)
 Depressurize the Green hydraulic system
 (Ref. TASK 29-10-00-864-001).

 (2)
 De-energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-862-002).

 Subtask 32-30-00-865-050
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU L/G/LGCIU/SYS1/NORM 1GA C09 121VU HYDRAULIC/LGCIU/SYS2 2GA Q35 121VU HYDRAULIC/LGCIU/SYS1/GRND SPLY 52GA Q34
 1EFF : ALL 1 32-30-00Page 205 1 1 Feb 01/02 1 1 1CES 1 TASK 32-30-00-867-002

 Extension of the Landing Gear after Maintenance
 WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：A320飛機維護手冊 AMM LANDING GEAR 起落架4(27)