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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