(t)
Make sure the EICAS message STANDBY BUS OFF does not show on the upper display.
(u)
Open the 6L11 INV PWR BAT circuit breaker on the main power distribution panel (P6).
(v)
Make sure the yellow OFF light next to the STBY PWR switch comes on.
(w)
Make sure the EICAS message STANDBY BUS OFF shows on the upper display.
(x)
Put the STBY PWR switch to the AUTO position.
(y)
Close the AC STBY PWR circuit breaker (6K16) on the main power distribution panel (P6).
(z)
Make sure the yellow OFF light next to the STBY PWR switch goes off. (aa) Make sure the EICAS message STBY BUS OFF does not show on the upper display.
(ab) Close the INV PWR TRU (6D10) and INV PWR BAT (6L11) circuit breakers on the main power distribution panel (P6).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
24-33-00
ALL ú ú 03 Page 607 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(ac) Push the ELEC HYD switch on the EICAS maintenance panel on the right side panel (P61). (ad) Make sure the EICAS shows these values: 1) STBY BAT: AC-V = 115 |5 FREQ = 400 |5 DC-V = 28 |2
APU/BAT: DC-V = 28 |2
(2) S 866-013Do the activation procedure for the spoilers (AMM 27-61-00/201), if deactivated.
(3) S 866-014Remove electrical power if it is no longer needed (AMM 24-22-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
24-33-00
ALL ú ú 01 Page 608 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
STANDBY POWER RELAYS - REMOVAL/INSTALLATION
___________________________________________
1. General
_______
A. The AC standby power relay, K105, and the standby power relay, K109, are in the main power distribution panel, P6.
TASK 24-33-01-004-001
2. Remove the Standby Power Relay (Fig. 401)
______________________________
A. References
(1)
AMM 24-22-00/201, Electrical Power - Control
(2)
AMM 27-61-00/201, Spoiler/Speedbrake Control System
B. Access
(1) Location Zones
211/212 Flight Compartment
C. Prepare for the Removal
S 044-002
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES WHEN
_______ HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
(1)
Do the deactivation procedure for the spoilers (AMM 27-61-00/201) or move all persons and equipment away from the spoilers.
S 864-003
(2)
Remove electrical power from the airplane (AMM 24-22-00/201).
D. Remove the Standby Power Relays
S 024-004
(1) Do these steps to remove the standby power relay:
WARNING: DO NOT OPEN THE POWER DISTRIBUTION PANEL, P6 BEFORE YOU
_______ REMOVE THE ELECTRICAL POWER FROM THE AIRPLANE. VOLTAGE LEVELS IN THE P6 PANEL CAN CAUSE INJURIES TO PERSONS.
(a)
Open the P6 panel.
(b)
Do these steps for the AC standby power relay:
1) Remove the electrical connector from the AC standby power relay.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
24-33-01
ALL ú ú 01 Page 401 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
FLIGHT COMPARTMENT
Standby Power Relays Installation
Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú 中國航空網 m.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：757 AMM 飛機維護手冊 電源 ELECTRICAL POWER 2(64)
