757
MAINTENANCE MANUAL
S 215-047
(13)
Make sure warm air comes out of the eleven vent nozzles.
S 865-048
(14)
Put the EICAS COMPUTER switch on the pilot's display to the LEFT position.
S 865-049
(15)
Open this circuit breaker on the P37 panel:
(a)
37C2, AFT CARGO FAN
S 215-050
(16)
Make sure the fan stops and the heater does not have electrical power.
S 215-052
(17)
Push the STATUS key on the EICAS pilot's display.
(a)
Make sure the EICAS status message, AFT CARGO FAN, shows on the bottom EICAS display.
S 215-053
(18)
Push the ECS/MSG key on the EICAS maintenance panel.
(a)
Make sure the EICAS maintenance message, AFT CARGO FAN, shows on the bottom EICAS display.
S 865-054
(19)
Put the EICAS COMPUTER switch on the EICAS pilot's display to RIGHT.
S 865-055
(20)
Push the AUTO READ button on the EICAS maintenance panel.
S 865-103
(21)
Push the ERASE button on the EICAS maintenance panel.
(a)
Make sure the EICAS maintenance message, AFT CARGO FAN, stays on the bottom EICAS display .
S 865-056
(22)
Close this circuit breaker on the P37 panel:
(a)
37C2, AFT CARGO FAN
(23)
Make sure the fan starts and the heater has electrical power.
(24)
Push the AUTO READ button on the EICAS maintenance panel.
S 215-057
S 865-059
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-44-00
ALL ú ú 01 Page 507 ú Mar 20/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 865-104
(25)
Push the ERASE button on the EICAS maintenance panel.
(a)
Make sure the EICAS maintenance message, AFT CARGO FAN, goes off.
S 215-060
(26)
Push the AFT CARGO FIRE switch-light on the P8 stand to the ARMED position (ARMED light on).
(a)
Make sure the fan stops and the heater does not have electrical power.
S 215-062
(27)
Push the AFT CARGO FIRE switch-light on the P8 stand to the usual position (ARMED light off).
(a)
Make sure the fan starts and the heater has electrical power.
S 805-064
(28)
Measure the temperature of the air that comes from a nozzle.
S 885-065
(29)
Increase the temperature of the temperature control switch to 70°F (21°C) maximum.
S 215-066
(30)
Make sure the temperature that comes from the nozzle decreases and the fan stops after approximately 20 seconds.
S 885-068
(31)
Remove the heat source.
(32)
Close the aft cargo compartment door, 822.
(33)
Remove electrical power, if it is not necessary.
S 415-069
S 865-070
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
21-44-00
ALL ú ú 01 Page 508 ú Mar 20/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 715-115
(34) Do the task: Aft Cargo Temperature Control Switch Check.
TASK 21-44-00-715-112
5. Aft Cargo Temperature Control Switch Check (Fig 501)__________________________________________
A. General
(1)
When the cargo compartment temperature is less than 50°F (10°C), the temperature control switch closes. This sends a signal to the relays that control the fan and heater. The fan removes cold air from the cargo compartment and pushes it through a series of eleven nozzles. When the cargo compartment temperature is 70°F (21°C), the switch opens the circuit to the cargo compartment heater relay. After a 20-second time delay, the fan relay stops the heat supply to the compartment.
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 空调 AIR CONDITIONING 1(143)
