29-21-20
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 (b)  
Move the limit switch vertically, until it is in the open position, when it touches the ramp on the swivel valve.

 (c)  
Tighten the screws, which attach the limit switch to the switch support bracket, to 2.5-3.5 pound-inches.

 (d)  
Loosen the screws that attach the support bracket to the RAT strut housing.

 (e)  
Move the limit switch horizontally until it opens when the RAT strut is 15 | 1/2 degrees from the fully extended position.

 (f)  
Tighten the screws, which attach the switch support bracket to the RAT strut housing to 51-56 pound-inches.

 S 432-024
 (8)  
Connect the electrical connector at the top of the RAT strut housing.

 S 432-025

 (9)  
Connect the RAT door link (AMM 29-21-10/401).

 S 432-026

 (10)
 Connect the RAT deployment arm to the RAT strut housing (AMM 29-21-05/401).

 (11)
 Retract the RAT (AMM 29-21-00/201).

 S 862-027
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-21-20
 ALL  ú ú 01 Page 207 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 RAM AIR TURBINE (RAT) BLADE LOCK LIMIT SWITCH - MAINTENANCE PRACTICES
_____________________________________________________________________
 1.  General_______
 A.  This procedure contains three tasks, one to remove, one to install, and one to adjust the limit switch for the blade lock of the ram air turbine (RAT).
 B.  This procedure replaces the limit switch for the RAT blade lock without the removal of the RAT wire harness. You can also remove the limit switch for the RAT blade lock with the RAT wire harness (AMM 29-21-18/401).
 TASK 29-21-21-022-001
 2.  Remove the Limit Switch for the Ram Air Turbine (RAT)_____________________________________________________
 A.  References
 (1)  AMM 29-21-00/201, Ram Air Turbine (RAT) System
 B.  Access
 (1)  
Location Zones
 198 Wing to Body - Aft Lower Half (Right)

 (2)  
Access Panel
 198MR RAT Compartment

 C.  Remove the Limit Switch (Fig. 201)
 S 862-002
 (1)  
Extend the RAT (AMM 29-21-00/201).

 S 022-003

 (2)  
Remove the screws from the switch cover.

 S 022-004

 (3)  
Remove the switch cover and the limit switch from the RAT strut housing.

 (4)  
Remove the screws from the limit switch.

 (5)  
Remove the limit switch and the switch plate from the switch cover.

 S 032-007

 (6)  
If the switch has inline electrical connectors,
 do these steps:

 S 022-005
 S 022-006
　
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