6. Restore Airplane to Normal Configuration
A. Install aft access panel on nose wheel well left and right bulkheads, connect nose gear taxi light electrical plug at connection on inboard side of right nose gear wheel well bulkhead and lockwire plug with NC32 lockwire.
B. Remove caps and connect hydraulic lines (2) to swivel (3) on swivel bracket (1) on right trunnion (4).
C. Install nose gear wheel well doors (Ref 32-22-11 R/I).
D. Remove nose gear ground lock assembly (34) from nose gear.
E. Remove shock strut restrainer (10).
F. Pressurize shock strut (Ref Chapter 12, Nose Landing Gear Shock Strut - Servicing).
G. Pressurize hydraulic system A and check for leaks at swivels (3) (Ref 29-11-0 MP).
H. Perform extension and retraction test of nose landing gear (Ref 32-33-0 A/T).
I. Perform a manual extension system test of the nose landing gear (Ref 32-35-00 A/T).
J. Install ground lock assembly (34).
K. Depressurize hydraulic system A (Ref 29-11-0 MP).
L. Perform steering test of nose wheel.
(1)
Jack nose of airplane until nose gear tires clear ground (Ref Chapter 7, Jacking Airplane).
CAUTION: TAKE CARE NOT TO OPERATE STEERING WHEEL WITH SHOCK STRUT FULLY EXTENDED AND TORSION LINKS CONNECTED OR DAMAGE TO SHOCK STRUT CENTERING CAMS MAY RESULT. CHECK THAT SHOCK STRUT IS COMPRESSED 2.10 INCHES OR MORE BEFORE OPERATING STEERING SYSTEM. DISTANCE BETWEEN BOTTOM SURFACE OF LOWER STEERING PLATE AND TOP SURFACE OF TOWING LUG MUST BE LESS THAN 21.90 INCHES.
(2)
Position greased turning plates under nose gear tires and lower airplane so that weight of airplane is supported by landing gear.
(3)
Pressurize hydraulic system A (Ref 29-11-0 MP).
(4)
Check that nose gear does not attempt to steer when hydraulic system A is pressurized.
(5)
Check that steering wheel is in neutral (centered) position.
(6)
Check that rudder pedals are in neutral position.
(7)
Rotate steering wheel counterclockwise to left stop position and hold.
(a) Check that nose gear steers to left approximately 78 degrees.
(8)
Rotate steering wheel clockwise to right stop position and hold.
(a) Check that nose gear steers to right approximately 78 degrees.
(9)
Release steering wheel.
(a)
Check that steering wheel returns to neutral position.
(b)
Check that nose gear returns to centered position.
(10)
Push left rudder pedal forward until rudder quadrant stop is contacted. Check that nose gear steers left approximately 7 degrees.
(11)
Release rudder pedal. Check that rudder pedals return to neutral position and that nose gear returns to center position.
(12)
Repeat steps (10) and (11) using right rudder pedal.
(13)
Jack nose of airplane until nose gear tires clear ground (Ref Chapter 7, Jacking Airplanes) and remove grease turning plates.
502
32-21-0 Page 410 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Oct 20/91
M. Lower airplane jacks (Ref Chapter 7, Jacking Airplane).
N. Remove jacks from under airplane.
O. Remove system A hydraulic power (Ref 29-11-0 MP) if no longer required.
501
Oct 20/91 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 32-21-0 Page 411
NOSE LANDING GEAR - INSPECTION/CHECK
1. General
A. Periodic inspection of the nose landing gear is described in par. 2. For special inspections, refer to Chapter 5.
2. Nose Landing Gear Inspection
A. Equipment and Materials
(1) Ground Lock Assemblies (Ref 32-00-01).
B. Examine Nose Landing Gear
(1)
Check that ground lock assemblies (Ref 32-00-01) are installed.
(2)
Check strut air valve vent and strut for hydraulic leaks.
NOTE: Continued leaking from vent indicates necessity for internal seal replacement.
(3)
Check strut outer cylinder lug welds and seams for cracks.
(4)
Check exterior surface of strut inner cylinder for dirt, scratches, and galling.
(5)
Check strut for correct hydraulic fluid level and for correct inflation pressure (Ref Chapter 12, Nose Landing Gear Shock Strut Servicing).
(6)
Check for cracks in sealant fillet around shock strut gland nut and evidence of leaks.
(7)
Check torsion links, steering collar, and steering cylinder support plate attachment lugs for cracks and loose mounting bolts.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：737 AMM 飞机维护手册 起落架 LANDING GEAR(61)
