(i)
LDG GEAR MONITOR: A LDG GEAR MONITOR status message will appear whenever one or more of the above maintenance messges are enabled. The maintenance messages have time delays varying from 2 to 60 seconds.
NOTE: The LDG MONITOR status message is not in NVM but is
____ displayed when one or more of the NVM maintenance messages are displayed.
C. Sensors
_______
(1)
Main landing gear down and locked sensors (Fig. 2)
(a)
Sensors S10061 (left) and S10057 (right) for system 1, and S10074 (left) and S10070 (right) for system 2, are located on the main gear down lock links at the apex. The sensors provide logic signals for the GEAR, LEFT, and RIGHT lights and EICAS messages GEAR DISAGREE and LDG GEAR MONITOR.
(2)
Main landing gear up and locked sensor (Fig. 3)
(a)
Sensors S10240 (left) and S10239 (right) for system 1, and S10064 (left) and S10059 (right) for system 2, are located on the uplock assembly in the outboard fairing of the main wheel well. The sensors provide logic signals for the GEAR light and EICAS messages GEAR DISAGREE and PSEU BITE.
32-61-00
ALL ú ú 02 Page 4 ú May 28/01
A
757
MAINTENANCE MANUAL
INBD LOCK LINK
ASSY (REF)
SEE A
FWD
LEFT MAIN GEAR (RIGHT SIMILAR)
LOCK ACTUATOR (REF)
LOCK LINK ASSEMBLY (REF)
A
MLG DOWN
AND LOCKED
SENSORS
A
FLEXIBLE CONDUIT (REF)
MAIN LANDING GEAR DOWN AND LOCKED SENSOR LH S10061, SYS 1 LH S10074, SYS 2 RH S10057, SYS 1 RH S10070, SYS 2
LOWER LOCK UPPER LOCKSENSOR TARGETLINK (REF) (REF) LINK (REF)
MLG DOWN AND LOCKED SENSORS A-A
CONNECTORBRACKET (REF)
REAR SPAR (REF) CONNECTOR DISCONNECT (REF) FWD
FLEXIBLE CONDUIT (REF) INBD
LOCK LINK ASSY (REF)
A
Main Landing Gear Proximity Sensors
Figure 2
32-61-00
ALL ú ú 01 Page 5 ú Mar 15/86
A
757
MAINTENANCE MANUAL
L MAIN GEAR UPLOCK ASSEMBLY
SEE B
SEE A
FWD
LEFT MAIN
B MLG UP AND WHEEL WELL OUTBOARD WALL
LOCKED (RIGHT SIMILAR)
SENSOR
A
B
INBD
MAIN GEAR UPLOCK HOOK (REF)
L MAIN GEAR UPLOCK ASSEMBLY
STRUCTURE(RIGHT SIMILAR)
B
MLG MLG
UP AND LOCKED UP AND LOCKED
SENSOR SENSOR
S10073, SYS 2, LH S10240, SYS 1, LH
S10069, SYS 2, RH S10239, SYS 1, RH
UPLOCK ASSEMBLY
B-B
MLG Up and Locked Proximity Sensors Figure 3
32-61-00
ALL ú ú 01 Page 6 ú Sep 15/85
A
757
MAINTENANCE MANUAL
(3)
Main landing gear door closed sensors (Fig. 4)
(a)
Sensors S10242 (left) and S10241 (right) for system 1, and S10076 (left) and S10072 (right) for system 2, are located on the forward outboard main wheel well gear door opening. The sensors provide logic signals for EICAS messages GEAR DOORS and PSEU BITE.
(4)
Nose gear locked sensors (Fig. 5)
(a)
Sensors S10065 for system 1 and S10078 for system 2 are located on the nose gear lock link at the apex. The sensors provide logic signals for NOSE and GEAR lights and EICAS messages GEAR DISAGREE and PSEU BITE.
(5)
Nose gear up position sensors (Fig. 5)
(a)
Sensors S10238 for system 1 and S10077 for system 2 are located above the upper drag brace on the nose wheel well ceiling. The sensors provide logic signals for GEAR light and EICAS messages GEAR DISAGREE and LDG GEAR MONITOR.
(6)
Nose gear down position sensors (Fig. 5)
(a)
Sensors S10066 for system 1 and S10079 for system 2 are located above the upper drag brace on nose wheel well ceiling. The sensors provide logic signals for the GEAR light and EICAS messages GEAR DISAGREE and LDG GEAR MONITOR.
(7)
Nose gear door closed sensor (Fig. 5)
(a)
Sensors S10243 for system 1 and S10081 for system 2 are located near the center of the nose gear wheel well sill. The sensors provide logic signals for the DOORS light and EICAS message GEAR DOORS
3. Operation
_________
A. Functional Description (Fig. 6)
______________________
(1)
Landing gear systems 1 and 2 sensors, through sensing of targets near or far, provide landing gear and gear door position signals to the PSEU. The PSEU processes these signals for indication lights and EICAS messages functions.
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：757 AMM 飛機維護手冊 起落架 CHAPTER 32 - LANDING GEAR 3(142)
