PUSH
TO TEST

DATASONICS ATS-260

Underwater Locator Beacon Test Sets
Figure 203

E34467
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A
737-300/400/500MAINTENANCE MANUAL
 (i)  
Remove the metal braid from the ULB case and the center of the water switch. 1) Make sure that you do not hear a pulsed tone.

 (j)  
Set the ON-OFF-GAIN control switch to the OFF position.

 (k)  
Make sure that the water switch on the ULB has no grease or dirt. 1) If necessary, clean the switch with water and detergent. 2) Dry the switch with a clean cloth.

 S 722-022
 (2)  If you have a PL1 test set, do this test:
 (a)  Use tape to attach a piece of metal braid to the ULB case and the center of the water switch.
 NOTE: This will make a short circuit from the center of
____ the water switch to the outer part of the ULB.
 (b)  
Put the end of the test set against the ULB, approximately one inch from the water switch end.

 (c)  
Push and hold the operation switch on the test set.

 1)  Make sure that the "BEACON ACTIVE WHEN FLASHING" light flashes.

 (d)  
Remove the metal braid from the ULB case and center of the water switch. 1) Make sure that the "BEACON ACTIVE WHEN FLASHING" light does

 not flash.

 (e)  
Release the operation switch on the test set.

 (f)  
Remove the test set.

 (g)  
Make sure that the water switch on the ULB has no grease or dirt. 1) If necessary, clean the switch with water and detergent. 2) Dry the switch with a clean cloth.

 S 722-088
 (3)  If you have a PL3 test set, do this test:
 (a)  
Push and hold the test set against the ULB water switch. 1) Make sure that you hear a pulse sound. 2) Make sure that you see the LED light comes on and off.

 (b)  
Remove the test set from the ULB.

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A 737-300/400/500MAINTENANCE MANUAL
 (c)  Make sure that the water switch on the ULB has no grease or dirt. 1) If necessary, clean the switch with water and detergent. 2) Dry the switch with a clean cloth.
 S 712-002
 (4) If you have an ATS-260 test set, do this test of the ULB:
 (a)  
Put the test set clip on the ULB.

 (b)  
Push and hold the PUSH TO TEST button.

 (c)  
Put the test set probe on the ULB water switch. 1) Make sure that the green LED shows. 2) Make sure that you can hear sounds from the test set. 3) Make sure that the amber LED comes on and off.

 (d)  
Release the PUSH TO TEST button.

 (e)  
Remove the test set.

 (f)  
Make sure that the water switch on the ULB has no grease or dirt. 1) If necessary, clean the switch with water and detergent. 2) Dry the switch with a clean cloth.

 TASK 23-71-21-402-017
 6. Underwater Locator Beacon Installation (Fig. 201)
______________________________________
 A. References
 (1)  AMM 23-71-11/401, Voice Recorder
 B. Consumable Materials
 (1)  B00541 Detergent, General Purpose
 C. Access
 (1)  Location Zone
 219 Aft Cargo Compartment, Right

 D. Installation Procedure
 S 422-003
 (1) Install the underwater locator beacon on the voice recorder:
 (a)  
Make sure that the water switch on the ULB has no grease or dirt. 1) Clean the water switch with a weak detergent.

 (b)  
AIRPLANES WITH MODEL A100A AND SOLID STATE VOICE RECORDER; Turn the ULB until the water switch points down.

 (c)  
AIRPLANES WITH MODEL A100 VOICE RECORDER; Turn the ULB until the water switch points right.

 (d)  
　
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