29-21-51
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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
AFT BULKHEAD OF THE
RIGHT WHEEL WELL
SEE A
FWD
GROUND TACHOMETER MANUAL SWITCH
FAIRING TACHOMETER AND GROUNDPANEL MANUAL SWITCH FOR THE RAM AIR TURBINE (RAT)
SEE B
ACCESS
PANEL
AFT BULKHEAD OF THE RIGHT WHEEL WELL MOUNTING A BRACKET
FWD
BOLT ELECTRICAL (4 LOCATIONS) CONNECTOR (2 LOCATIONS)
SCREW
BOLT (4 LOCATIONS) (EXAMPLE)
TACHOMETER AND GROUND MANUAL SWITCH
B
Tachometer and Ground Manual Switch Installation Figure 401
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29-21-51
ALL ú ú 01 Page 402 ú May 28/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
TASK 29-21-51-424-009
3. Install the Tachometer and Ground Manual Switch for the Ram Air_______________________________________________________________ Turbine (RAT)_____________
A. References
(1)
AMM 29-21-00/201, Ram Air Turbine (RAT) System
(2)
AMM 29-21-00/501, 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. Install the Tachometer and Ground Manual Switch (Fig. 401)
S 424-010
(1)
Put the tachometer and ground manual switch on the mounting bracket.
S 434-011
(2)
Install the bolts for the tachometer and ground manual switch.
S 434-012
(3)
Connect the electrical connectors to the tachometer and the ground manual switch.
S 434-013
(4)
Install the screws to attach the fairing panel.
S 714-014
(5)
Do the test for the RAT hydraulic pump to make sure the tachometer operates correctly (AMM 29-21-00/501).
(6)
Retract the RAT (AMM 29-21-00/201).
S 864-015
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29-21-51
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
RAM AIR TURBINE (RAT) AIRSPEED SWITCH - REMOVAL/INSTALLATION
____________________________________________________________
1. General_______
A. This procedure contains two tasks, one to remove and one to install the airspeed switch on the ram air turbine (RAT).
B. The airspeed switch is installed on a stanchion on the outboard side of the E1 rack in the main equipment bay.
TASK 29-21-53-024-001
2. Remove the Airspeed Switch for the Ram Air Turbine (RAT)________________________________________________________
A. Equipment
(1) RAT Circuit Breaker Lock Set - B27065-9 or Equialent
B. Access
(1)
Location Zones
119 Main Equipment Center
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