32-33-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
CONTINUED FROM PRECEDING PAGE
NO - If the functional test was not normal or you can not install the ground lock assembly for the nose landing gear, adjust the lock mechanism (OHM 32-34-13).
NOTE:____ You can not adjust the lock
mechanism if it is installed on
the airplane. It is necessary
to remove the lock mechanism to
adjust it (AMM 32-33-51/401).
(Ref. Nose Landing Gear Lock
Mechanism - Inspection/Check
AMM 32-33-51/601.)
Can you now install the nose landing gear ground lock assembly? IF -
H54942
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32-33-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
NOSE LANDING GEAR EXTENSION AND RETRACTION - ADJUSTMENT/TEST
____________________________________________________________
1. General
_______
A. You can lift the airplane to examine the nose landing gear. Make sure you install the lock assemblies (AMM 32-00-01) in the main landing gear.
B. Use the airplane system for a straight retraction test after the replacement of hydraulic components. The gear operating time and hydraulic pressure will be near normal when the hydraulic system is used.
TASK 32-33-00-865-001
2. Nose Landing Gear Extension and Retraction Examination Preparation
__________________________________________________________________
A. Procedure
S 865-002
(1)
Do a static grounding on the airplane (AMM 20-40-11/201).
S 865-003
(2)
Lift the airplane for the retraction test of the nose landing gear (AMM 07-11-11/201).
S 865-004
WARNING: FAILURE TO OPEN THE CIRCUIT BREAKERS WILL CAUSE FLUID TO
_______ TRANSFER FROM THE HYDRAULIC SYSTEM B TO HYDRAULIC SYSTEM A. THIS WILL CAUSE THE HYDRAULIC FLUID LEAKAGE AND INJURY TO PERSONS.
(3)
Open the LDG GEAR SYS XFR VALVE - PRIM CONT and LDG GEAR SYS XFR VALVE - ALT CONT circuit breakers on P6 panel.
(a)
Connect the electrical power.
(b)
Remove the ground lock assembly from the nose landing gear (AMM 32-00-01/201).
(c)
Examine that nose gear is fully extended and locked, with the control lever in the OFF position.
CAUTION: DO NOT USE THE AIRPLANE HYDRAULIC SYSTEM IF THERE IS LESS
_______ THAN 250 GALLONS (1675 LBS/760 KG) OF FUEL IN THE FUEL TANK.
(d) Pressurize the hydraulic systems A and B (AMM 29-15-00/201).
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737-300/400/500MAINTENANCE MANUAL
CAUTION: DO NOT TURN THE STEERING WHEEL WITH THE SHOCK STRUT FULLY
_______ EXTENDED. IT IS BECAUSE IT CAN CAUSE DAMAGE TO THE CENTERING CAMS IN THE SHOCK STRUT.
(e)
Put the flaps in the up position to prevent PTU operation.
(f)
Move the two throttles to a position larger than 17 degrees.
TASK 32-33-00-735-005
3. Nose Landing Gear Extension and Retraction Examination
______________________________________________________
A. Equipment
_________
(1)
Hydraulic Test Bench, capable of delivering 10 gpm at 3000 psi
(2)
Ground Lock Assemblies (AMM 32-00-01)
(3)
Stopwatch
B.
Procedure
S 865-007
WARNING: REMOVE THE EQUIPMENT AND PERSONS FROM THE NOSE WHEEL WELL
_______ BEFORE YOU OPERATE THE GEAR. MAKE SURE THAT YOU INSTALL THE GROUND LOCK ASSEMBLIES IN THE MAIN LANDING GEAR TO PREVENT ACCIDENTAL OPERATION OF THE GEAR. FAILURE TO DO THAT WILL CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT IF THE GEAR RETRACTS.
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