757 AMM 飞机维护手册 COMMUNICATIONS 通讯(101)

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 TASK 23-43-01-004-001
 2.  Remove the Ground Crew Call Horn (Fig. 401)________________________________
 A.  General
 (1)  This task gives the instructions to remove the ground crew call horn from the nose gear wheel well.
 B.  References
 (1)  
23-42-02/401, Pilots' Call Panel

 (2)  
32-00-15/201, Landing Gear Door Lock

 (3)  
32-00-20/201, Landing Gear Downlocks

 C.  Access
 (1)  Location Zones
 211/212 Flight Compartment
 710 Nose Landing Gear and Doors

 D.  Prepare for Removal
 S 864-002
 (1)  
Make sure that the landing gear downlocks are installed (Ref 32-00-20).

 (2)  
Open the nose gear doors.

 (3)  
Install the door locks (Ref 32-00-15).

 S 864-022

 (4)  
Open these circuit breakers on the overhead circuit breaker panel, P11, and attach DO-NOT-CLOSE tags:

 (a)  
11A32, INDICATOR LIGHTS 1

 (b)  
11C23, INTERPHONE CABIN SERVICE

 (c)  
11H31, GND CALL

 

 S 014-003
 S 494-021
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 23-43-01
 ALL  ú ú 01 Page 401 ú Jan 20/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 S 034-009
 CAUTION:_______ WHEN THE AURAL WARNING IS REMOVED, MAKE SURE THAT THE
 EQUIPMENT COOLING SYSTEM OPERATES CORRECTLY.  MAKE CHECKS
 FOR EQUIPMENT COOLING FAILURE MESSAGES ON THE EICAS
 SCREENS EVERY 15 MINUTES.  COOLING FAILURES CAN CAUSE
 DAMAGE TO EQUIPMENT.
 CAUTION:_______ IF THE AIRPLANE IS ON BATTERY POWER, MAKE SURE THAT THE
 IRS MODE SELECT SWITCHES ARE SET TO OFF.  FAILURE TO DO

 THIS CHECK CAN CAUSE A DECREASE IN BATTERY POWER.
 (5)  Remove the pilots' call panel (M51) (Ref 23-42-02). NOTE: The equipment cooling and inertial reference systems can
____ cause the ground crew call horn to operate unless prevented by the removal of the pilots' call panel.

GROUND CREW CALL HORN

Ground Crew Call Horn Installation
Figure 401

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 23-43-01
 ALL  ú ú 01 Page 402 ú Mar 20/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 E. Remove the Ground Crew Call Horn
 S 034-006
 (1)  
Remove the three screws that hold the horn.

 S 034-007

 (2)
Remove the electrical leads from the horn terminals.

 (a)  Identify the leads and terminals for installation.
 S 024-008
 (3)  Remove the ground crew call horn.
 TASK 23-43-01-404-010
 3. Install the Ground Crew Call Horn (Fig. 401)
_________________________________
 A. General
 (1)  This task gives the instructions to install the ground crew call horn to the left side of the nose gear wheel well.
 B. Consumable Materials
 (1) B00316 Solvent - Aliphatic Naphtha, TT-N-95 ú (2) Potting Compound - BMS 8-68, Type II (AMM 20-30-01)
 C. References
 (1)  
23-42-02/401, Pilots' Call Panel

 (2)  
24-22-00/201, Electrical Power - Control

 (3)  
32-00-15/201, Landing Gear Door Lock

 (4)  
32-00-20/201, Landing Gear Downlocks

 D. Access
 (1)  Location Zones
 211/212 Flight Compartment
 710 Nose Landing Gear and Doors

 E. Install the Ground Crew Call Horn
 S 114-011
 (1)  
Clean the horn terminals and the electrical leads with solvent.

 (2)  
Connect the electrical leads to the horn terminals.

 S 394-014

 (3)  
Apply layers of potting compound to the electrical leads and the horn terminals.

 S 434-012
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