S 014-003
(2)
For the applicable system, remove the access panel 452DL (462DL, 472DL or 482DL) for the midlower forward strut (Ref 06-09-09/201).
S 864-002
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A
747-400
MAINTENANCE MANUAL
SEE A
INBOARD
SEE A
FAN AIR OUTBOARD
TEMPERATURE FAN AIR
SENSOR TEMPERATURE
SEE B GASKET
SEE C
A
Fan Air Temperature Sensor Installation Figure 401 (Sheet 1)
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747-400
MAINTENANCE MANUAL
FAN AIR TEMPERATURE
FAN AIR TEMPERATURE
GASKET
SENSOR SEE C
A
MOUNTING BOLT (4 LOCATIONS)
AB
B
TOP
COOLING AIR
SIGNAL PRESSURE TUBE SENSE LINE
TUBE
FAN AIR TEMPERATURE SENSOR
PORT FWD
(INSULATION BLANKET REMOVED) 1 B FAN AIR TEMPERATURE GASKET C
ELBOW
JAMNUT REDUCER
O-RING
O-RING
A-A
1 IT IS POSSIBLE TO INSTALL THE GASKET BACKWARDS MUST SEE SENSE LINE PORT HOLE.
B-B
Fan Air Temperature Sensor Installation
Figure 401 (Sheet 2)
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747-400 MAINTENANCE MANUAL
E. Remove the Fan Air Temperature Sensor
S 034-004
(1)
Disconnect the cooling air tube from the fan air temperature sensor.
S 034-021
(2)
Disconnect the signal pressure tube from the fan air temperature sensor.
S 034-005
(3)
Put caps on the open tubes and the ports to keep out unwanted objects.
S 034-022
(4)
Remove the four mounting bolts and washers from the fan air temperature sensor.
S 024-023
(5)
Remove the fan air temperature sensor from the strut.
S 034-007
(6)
Remove the gasket from the mounting boss.
(a)
Discard the gasket.
S 034-008
(7)
Do the steps that follow if you must install a new fan air temperature sensor:
(a)
Remove the elbow, jamnut and O-ring from the signal pressure port. 1) Discard the O-ring.
(b)
Remove the reducer and O-ring from the cooling air port. 1) Discard the O-ring.
TASK 36-12-02-404-009
3. Install the Fan Air Temperature Sensor (Fig. 401)______________________________________
A. Consumable Materials
(1)
D01062, Never-Seez, Pure Nickel Special, NSBT-8N
(High temperature anti-seize compound)
(2)
G00095 Detector - Leak, Leak-Tek (160X)
(3)
D00062 Lubricant - Pneumatic System Thread, FS 1292 (Fluor-Silicone) MIL-G-4343
B. References
(1) 06-09-09/201, Nacelle and Engine-to-Wing
Access Doors and Panels
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