(b)  
Set the ON-NORM-TEST switch on the FRCP to the NORM position.

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 (3)  S 714-056AIRPLANES WITH A FLIGHT DATA ENTRY PANEL (FDEP) INSTALLED; Do the steps that follow: (a) Set the ON-NORM-TEST switch on the FDEP to the ON position. 1) Make sure the SYSTEM light goes off and DFDR light stays off on the FDEP. (b) Set the ON-NORM-TEST switch on the FDEP to the NORM position.
 (4)  S 864-047Remove electrical power if it is not necessary (AMM 24-22-00/201).

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 UNDERWATER LOCATOR BEACON (ULB) - MAINTENANCE PRACTICES
_______________________________________________________
 1.  General_______
 A.  This procedure has these tasks:
 (1)  
A removal of the underwater locator beacon (ULB).

 (2)  
A replacement of the ULB battery.

 (3)  
An operational test of the ULB.

 (4)  
An installation of the ULB.

 B.  The underwater locator beacon (ULB) is attached to the front of the flight data recorder.
 C.  The flight data recorder is installed on the E7 rack in the aft overhead passenger compartment.
 TASK 31-31-02-002-001
 2.  Underwater Locator Beacon Removal (Fig. 201)_________________________________
 A.  General
 (1)  The ULB has a battery as the power source. The ULB has no external electrical connections.
 B.  References
 (1)  AMM 25-22-02/401, Lowered Ceiling Panels
 C.  Access
 (1)  Location Zones 253 Area Above Passenger Compartment Ceiling, Left - Section 46 254 Area Above Passenger Compartment Ceiling, Right - Section 46
 D.  Removal Procedure
 S 012-038
 (1)  
Open the ceiling panel (AMM 25-22-02/401) in the aft passenger compartment to get access to the flight data recorder.

 S 022-061

 (2)  
Remove the underwater locator beacon from the flight data recorder:

 (a)  
Loosen the four screws that hold the ULB.

 (b)  
Remove the two screws and the clamp from one end of the ULB.

 (c)  
Remove the ULB.

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MAINTENANCE MANUAL

SCREW (4 LOCATIONS)
CLAMP
WATER SWITCH UNDERWATER LOCATOR BEACON

Underwater Locator Beacon Installation
Figure 201 (Sheet 1)
　
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本文鏈接地址：757 AMM 飛機維護手冊 儀表 CHAPTER 31 - INSTRUMENTS 1(106)