S 865-063
(4)
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P6 panel:
(a)
6F5, LANDING GEAR ALTN EXT CONT
(b)
6F6, LANDING GEAR ALTN EXT MOTOR
S 865-062
(5)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel:
(a)
11S17, DOORS CLOSE GROUND ACCESS
S 865-053
(6)
Remove the pressure from the left hydraulic system if it is not necessary (AMM 29-11-00/201).
S 865-052
(7)
Remove electrical power if it is not necessary (AMM 24-22-00/201).
TASK 32-35-00-705-051
6. System Test - Ground Release of the Landing Gear Doors (Fig. 503)
______________________________________________________
A. General
(1)
This test contains a check of the ground release of the landing gear doors.
B.
References
(1)
AMM 06-41-00/201, Fuselage (Major Zone 100 and 200) Access Doors and Panels
32-35-00
ALL ú ú 05 Page 525 ú Jan 28/02
A
757
MAINTENANCE MANUAL
(2)
AMM 24-22-00/201, Electrical Power - Control
(3)
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
C.
Access
(1)
Location Zones
144 Main Landing Gear Wheel Well (Right)
211 Control Cabin (Left)
212 Control Cabin (Right)
711 Nose Landing Gear
731 Main Landing Gear (Left)
741 Main Landing Gear (Right)
(2)
Access Panel
198PR Door - Landing Gear Ground Control (Right)
D.
Do the Test of the Ground Release System for the Landing Gear Doors
S 495-050
(1)
Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
S 865-049
(2)
Make sure these circuit breakers on the main power distribution panel, P6, are closed:
(a)
6F5, LANDING GEAR ALTN EXT CONT
(b)
6F6, LANDING GEAR ALTN EXT MOTOR
S 865-048
(3)
Make sure this circuit breaker on the overhead circuit breaker panel, P11, is closed:
(a)
11S17, DOORS CLOSE GROUND ACCESS
S 865-047
(4)
Supply electrical power (AMM 24-22-00/201).
S 735-046
(5)
Make sure the control lever for the landing gear is in the OFF position.
S 015-045
(6)
Open the access door for ground control of the landing gear doors, 198PR (AMM 06-41-00/201). Find the electrical service panel for the main wheel well, P72.
32-35-00
ALL ú ú 04 Page 526 ú May 28/99
A
757
MAINTENANCE MANUAL
S 735-043
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE AREA
_______ AROUND THE NOSE AND MAIN LANDING GEAR. THE DOORS OPEN QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(7)
At the same time move the ALL DOORS OPEN ARM switch to ARM and the ALL DOORS OPEN switch to OPEN. Hold them for 2 seconds. The switches are on the P72 panel.
S 735-039
(8)
Make sure the doors for the nose and main landing gear open.
NOTE:____The doors will fall because of their weight. You can manually help them to the fully open position if it is necessary.
S 735-038
(9)
Make sure the L and R MAIN GEAR DOOR UNSAFE lights in the main wheel wells are off. Make sure the NOSE GEAR DOOR UNSAFE light in the nose wheel well is off.
S 735-037
(10)
Push the MAIN GEAR DOOR UNSAFE LT PTT switch on the electrical service panel for the main wheel well, P72. Make sure the L and R MAIN GEAR DOOR UNSAFE lights come on.
S 735-035
(11)
Push the NOSE GEAR DOOR UNSAFE LT PTT switch on the left equipment panel on the nose landing gear, P63. Make sure the NOSE GEAR DOOR UNSAFE light comes on.
S 865-034
(12) 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 起落架 CHAPTER 32 - LANDING GEAR 2(103)
