EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 30-81-01
 ALL  ú ú 01 Page 402 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (4)  WDM 30-81-11
 C. Access
 (1)  Location Zone
 115 Area between Nose Gear Well and Fuselage, LH
 116 Area between Nose Gear Well and Fuselage, RH

 D. Procedure
 S 114-007
 (1)  
Clean the opening in the fuselage with cloth and cleaner.

 S 424-008

 (2)  
Install the ice detector probe:

 (a)  
Put the new gasket into the opening.

 (b)  
Connect the electrical connector to the probe.

 (c)  
Insert the probe into the fuselage cutout.

 (d)  
Install the bolts and torque them to 18-22 pound-inches.

 S 224-009
 (3)  
Make sure that the probe base is aligned with the airplane skin within .01 inch.

 S 864-010

 (4)  
Close these circuit breakers:

 (a)  
P414, Left Power Distribution Center
 1) 414L10, L ICE DETECTOR

 (b)  
P415, Right Power Distribution Center
 1) 415L33, R ICE DETECTOR

 S 714-012
 (5)  
Do this task: "Operational Test - Ice Detection System"
 (AMM 30-81-00/501).

 (6)  
Remove electrical power (AMM 24-22-00/201).

 S 394-014

 (7)  
Fill the gap between the probe and the fuselage with sealant. Make a smooth surface on the sealant.

 S 864-013
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 30-81-01
 ALL  ú ú 01 Page 403 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.