B. Procedure
 S 865-207
 (1)
Make sure you did the Prepare For Input Parameter Test task.

 S 735-208

 (2)
Do this test of the engage signals from the yaw damper:

 (a)  
Set the portable tester to SUBFRAME 0, WORD 3.

 (b)  
Engage the YAW DAMPER switch on the P5-3 panel.

 (c)  
Make sure the BIT 1 light on the portable tester is on.

 (d)  
Disengage the YAW DAMPER switch.

 (e)  
Make sure the BIT 1 light on the portable tester goes out.

 S 865-209
 (3)  If you will do no more tests, then do this task: "Put the Airplane to its Usual Condition."
 TASK 31-24-02-865-347
 52. Put the Airplane to its Usual Condition_______________________________________
 A. Reference
 (1)  AMM 24-22-00/201, Manual Control
 B. Access
 (1)  Location Zones
 101 Control Cabin - Left
 102 Control Cabin - Right

 C. Procedure
 S 865-348
 (1)  
Put the TEST--NORMAL switch in the NORMAL position.

 (2)  
Put the POWER switch on the portable tester to the OFF position.

 (3)  
Disconnect the portable tester from the flight recorder system.

 S 865-349
 S 085-350
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 BEJ 101-112, 114-999; ú  31-24-02
 ú ú 14 Page 564 ú Mar 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 865-351
 (4)  Remove the electrical power if it is not necessary (AMM 24-22-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 BEJ 101-112, 114-999; ú  31-24-02
 ú ú 11 Page 565 ú Mar 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 UNDERWATER LOCATOR BEACON - 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.  For these tasks it is necessary to open the aft lower ceiling panel No. 2. The ULB is on the front of the flight data recorder. The flight data recorder is above the ceiling panels at station 947.
 TASK 31-24-09-002-002
 2.  Underwater Locator Beacon Removal (Fig. 201)_________________________________
 A.  General
 (1)  The ULB has a battery as the power source. The ULB has no electrical connections.
 B.  References
 (1)  AMM 25-21-71/401, Lowered Ceiling Panels
 C.  Access
 (1)  Location Zone
 108 Aft Half of Cabin

 D.  Removal Procedure
 S 012-001
 (1)
Open the aft lower ceiling panel No. 2 (AMM 25-21-71/401).

 S 022-222

 (2)  
Do these steps to remove the underwater locator beacon (ULB) from the AlliedSignal 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.

 (d)  
Keep the two screws and the clamp.

 TASK 31-24-09-962-055
 3.  FLIGHT DATA RECORDERS WITH DUKANE ULBs; Underwater Locator Beacon Battery Replacement (Fig. 202)_____________________________________________
 A.  General
 (1)  Do not replace the battery in the DK100 underwater locator beacon (ULB). On or before the expired date, send the DK100 to the manufacturer for servicing.
 B.  Equipment
 (1)  
Split Radiator Hose
 1-1/4-inch diameter, 5 inches in length

 (2)  
810-325 Spanner wrench
　
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