S 144-003
 WARNING:_______DO NOT TOUCH THE PROBE WHEN THE PROBE HEAT IS ON. YOU CAN GET BURNED WHEN THE PROBE HEAT IS ON.
 (2)  Remove the sealant from around the bottom of the pitot-static probe (AMM 51-31-01/201):
 (a)  Remove the top part of the sealant, around the bottom of the probe, to get to the nylon cord.
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A

747-400 MAINTENANCE MANUAL
SEE A
STATIC (S2) PRESSURE LINE  ALIGN PIN CUTOUT 
(2 LOCATIONS) 
STATIC (S1) 
PRESSURE LINE 
PITOT PRESSURE 
LINE 
SEE  B 

GASKET 
STRUT 
BASE 
A  1 
ALIGN PIN CUTOUT 
(2 LOCATIONS) 
PRESSURE LINE STATIC (S2)  SEE  B 
STATIC (S1) 
PRESSURE LINE 
PILOT 
PRESSURE 
LINE 

NOTE:  ONE OF FOUR EQUIVALENT INSTALLATIONS.
STRUT GASKET
1
AIRPLANES WITHOUT EXTENDED
STRUT PITOT-STATIC PROBE BASE

2
AIRPLANES WITH EXTENDED  A 2
STRUT PITOT-STATIC PROBE
Pitot-Static Probe - Removal/Installation Figure 401 (Sheet 1)
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A

747-400
MAINTENANCE MANUAL

UPPER LEFT PITOT PROBE
LOWER LEFT PITOT PROBE
FWD 
INBD 
B 

Pitot-Static Probe - Removal/Installation
Figure 401 (Sheet 2)

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A

747-400 MAINTENANCE MANUAL
SEE A
ALIGN PIN CUTOUT 
(2 LOCATIONS) 
STATIC (S2)  SEE  B 
PRESSURE LINE 
STATIC (S1) 
PILOT  PRESSURE LINE 
PRESSURE 
LINE 

GASKET 
STRUT  BASE
A  1 
ALIGN PIN CUTOUT 
(2 LOCATIONS) 
STATIC (S2)  SEE  B 
PRESSURE LINE 
STATIC (S1) 
PILOT  PRESSURE LINE 
PRESSURE 
LINE 

____ONE OF FOUR EQUIVALENT
NOTE: INSTALLATIONS.
STRUT GASKET 1
AIRPLANES WITHOUT EXTENDED
STRUT PITOT-STATIC PROBE

BASE
2 AIRPLANES WITH EXTENDED
A2
STRUT PITOT-STATIC PROBE
Pitot-Static Probe - Removal/Installation Figure 401 (Sheet 3)
G23991
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A

747-400
MAINTENANCE MANUAL

UPPER LEFT PITOT PROBE
LOWER LEFT PITOT PROBE
____ LEFT SIDE SHOWN.
NOTE: RIGHT SIDE SIMILAR.
FWD
INBD
B
Pitot-Static Probe - Removal/Installation
Figure 401 (Sheet 4)

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