(g)
Lift the airplane nose to the necessary height.
NOTE: Raise the nose with the jack until the wheels are a
____ minimum of 3 inches above the ground. Do this when you do a retraction test of the nose landing gear.
(h) Put the wheel chocks for the main landing gear wheel against the wheels. This will prevent the forward and aft movement of the airplane while it is in the lifted position.
I. Put the Airplane Back to Its Initial Condition
S 582-017
(1) Lower the airplane nose off of the jack. Do the steps that follow:
CAUTION: CLEAR THE AREA BELOW THE AIRPLANE OF ALL EQUIPMENT BEFORE
_______ THE AIRPLANE IS LOWERED. WHEN YOU DO NOT CLEAR THE AREA, DAMAGE CAN OCCUR TO THE AIRPLANE OR TO THE EQUIPMENT.
(a) Make sure the area below the airplane is clear.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
07-11-02
ALL ú ú 01 Page 205 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(b) Make sure the landing gear control lever is in the DN position.
CAUTION: LET THE AIRPLANE ROLL FORWARD/AFT WHILE THE AIRPLANE NOSE
_______ IS LOWERED OFF THE JACK. WHEN YOU DO NOT LET THE AIRPLANE ROLL, DAMAGE CAN OCCUR TO THE MAIN LANDING GEAR OR TO THE AIRPLANE STRUCTURE.
(c)
Make sure that the wheel chocks do not touch the wheels of the main landing gear. This is to permit forward/aft movement of the wheels while the airplane is lowered off of the jack.
(d)
Make sure that the parking brake is released and the manual brake is not applied during the procedure.
(e)
Lower the jack until the jack is at the bottom or until the airplane weight is on the nose gear.
(f)
Move the jack away from the airplane.
(g)
Remove the jack adapter.
1) Install the filler bolts (4 places) at jack point A on the fuselage.
NOTE: Put Compound, Corrosion Preventive, MIL-C-11796
____ Class 3 on the filler bolts before you install them.
S 612-018
(2)
Do the servicing of the shock strut on the nose landing gear when it is necessary (AMM 12-15-02).
S 042-003
(3)
If electrical power was supplied during jacking do the steps that follow:
(a) On the PSEU (in the main equipment center, E-1 rack), push the RESET switch to erase the PSEU memory.
NOTE: Code "EEE" will be shown on the PSEU display during the
____
erase procedure.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
07-11-02
ALL ú ú 01 Page 206 ú Sep 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(b) Do the activation procedure for the flight mode simulation if you did the deactivation procedure (AMM 32-09-02).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
07-11-02
ALL ú ú 01 Page 207 ú Sep 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
Airplane Nose Jacking Point and Jacking Adapter
Figure 201
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
07-11-02
ALL ú ú 01 Page 208 ú Sep 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
22.1
28
260,000
AIRPLANE WEIGHT (POUNDS)
250,000
240,000
230,000
220,000
210,000
200,000
190,000
180,000
10 15 20 25 30 353940
CENTER OF GRAVITY (% MAC)
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：757 AMM 飞机维护手册 LIFTING & SHORING(8)
