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29-21-00
ALL ú ú 02 Page 205 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 862-009
(8) Open these circuit breakers on the P6 panel, and install the RAT circuit breaker lockset:
(a)
6F1, RAT MAN or RAT MAN PWR
(b)
6F2, RAT MAN CONT
S 862-010
(9)
Remove the pressure from the right hydraulic system (AMM 29-11-00/201).
S 492-011
(10)
Install the protective covers on the RAT turbine blades and the turbine hub (Fig. 202).
TASK 29-21-00-862-012
3. Retract the RAT_______________
NOTE:____Use two persons to do the RAT retraction procedure. One person operates the ground manual switch to retract the RAT. The other person monitors the RAT movement to make sure the RAT blades do not touch the airplane structure.
A. References
(1)
AMM 24-22-00/201, Electrical Power - Control
(2)
AMM 29-11-00/201, Main (Left, Right and Center) Hydraulic Systems
(3)
AMM 29-21-00/501, Ram Air Turbine (RAT) System
(4)
AMM 32-00-15/201, Main Gear Door Locks
B.
Access
(1)
Location Zones 143/144 MLG Wheel Well 198 Wing to Body - Aft Lower Half (Right) 211/212 Control Cabin 710 Nose Landing Gear and Doors 730/740 Main Landing Gear and Doors
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-21-00
ALL ú ú 02 Page 206 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
C. Retract the RAT (Fig. 201)
S 032-013
CAUTION: REMOVE THE RAT SAFETY SCREEN BEFORE YOU RETRACT THE RAT.
_______ IF THE RAT IS RETRACTED WITH THE SAFETY SCREEN ON, DAMAGE CAN OCCUR TO THE AIRPLANE EQUIPMENT.
(1)
If it is installed, remove the RAT safety screen (AMM 29-21-00/501).
S 862-014
(2)
Supply electrical power (AMM 24-22-00/201).
S 862-043
(3)
Make sure the battery switch, on the P5 panel, is turned ON.
S 862-015
(4)
Remove the RAT circuit breaker lockset and close these circuit breakers on the overhead panel, P11:
(a)
11D26, HYDRAULIC RAT CONT or HYDRAULIC RAT AUTO CONT
(b)
11D27, HYDRAULIC RAT AUTO or HYDRAULIC RAT AUTO PWR
S 862-016
(5) Remove the RAT circuit breaker lockset and close these circuit breakers on the main power distribution panel, P6:
(a)
6F1, RAT MAN or RAT MAN PWR
(b)
6F2, RAT MAN CONT
S 862-017
(6)
Pressurize the right hydraulic system (AMM 29-11-00/201).
S 092-018
(7)
Remove the protective covers from the RAT turbine blades and the turbine hub (Fig. 202).
S 822-019
(8)
Move the turbine hub to align the index marks on the turbine hub and the RAT strut.
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 液压 CHAPTER 29 - HYDRAULIC POWER 2(49)
