ASI-203 Altimeter Test Set
(DAI Part# ASI203)
This unit is manufactured to replace the OEM model and/or part
number listed below in form fit and function.
Equivalent OEM: Collins
Equivalent Model Number: 980N-1
Equivalent P/N 522-4610-004
Units Tested
AL101 Radio Altimeter System
AL101A Radio Altimeter System
Description of Operation
The ASI203 Altimeter Test Set is designed to isolate faults and perform
routine flight-line maintenance tests on the AL101 and AL101A Radio
Altimeter Systems. The Test Set requires a user supplied 339H-1 ( )
for proper operation. The ASI 203 can be used for functional bench
checks of the Collins 860F-1 Receiver transmitter and the 339H-( )
Indicator; it also provides the capability to test the ground proximity
warning systems (GPWS).
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