(2)
Remove the screws and remove the speed sensor cover from the RAT strut housing.
S 034-004
(3)
Remove the screws and remove the speed sensor from the RAT strut housing.
S 034-005
(4)
SPEED SENSORS WITH IN-LINE ELECTRICAL CONNECTORS; Cut the heat shrink sleeve that is on the electrical connectors on the wires that go to the speed sensor.
(a) Remove the electrical connectors.
S 034-007
(5) SPEED SENSORS WITHOUT IN-LINE ELECTRICAL CONNECTORS; Cut the wires about 1.75 inches away from the speed sensor.
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A
757
MAINTENANCE MANUAL
DOOR FOR THERAM AIR TURBINE (RAT)
RAM AIR TURBINE
SEE A
(RAT) COMPARTMENT
FWD
SPEED SENSOR
SEE B
SCREW (2 LOCATIONS)
RAM AIR TURBINE (RAT)
SPEED SENSOR A
COVER
TURBINE HUB
INLINE ELECTRICAL CONNECTOR (2 LOCATIONS)
1 SCREW (2 LOCATIONS)
LOCKNUT
WIRE HARNESS
SPEED SENSOR
GEAR
SPEED SENSOR
KEY
SPEED
LOCKWASHER SENSOR INSERT
RAT STRUT HOUSING SPEED SENSOR WITH A LOCKNUT
A
AIRPLANES WITH INLINE ELECTRICAL CONNECTORS
Tachometer Speed Sensor Installation
Figure 401 (Sheet 1)
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757
MAINTENANCE MANUAL
SCREW (2 LOCATIONS)
TURBINE HUB SPEED SENSOR COVER
ELECTRICAL CONNECTOR INLINE (2 LOCATIONS)
SPEED SENSOR RAT STRUT HOUSING
SPEED SENSOR GEAR WIRE HARNESS SCREW (2 LOCATIONS)
SPEED SENSOR SHIM
SPEED SENSOR WITH A SHIM
C
Tachometer Speed Sensor Installation
Figure 401 (Sheet 2)
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757 MAINTENANCE MANUAL
TASK 29-21-15-424-008
3. Install the Speed Sensor for the Ram Air Turbine (RAT)______________________________________________________
A. References
(1)
AMM 29-21-15/501, Ram Air Turbine (RAT) Tachometer Speed Sensor
B.
Access
(1)
Location Zones
198 Wing to Body - Aft Lower Half (Right)
(2)
Access Panel
198MR RAT Compartment
C.
Install the Speed Sensor (Fig. 401)
S 434-009
(1)
If it is necessary, install in-line electrical connectors on the wires in the wire harness and on the speed sensor.
S 434-010
(2)
Connect the wires from the speed sensor to the electrical connectors on the wire harness.
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