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SDR ASAA2020121133673

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Service difficulty report · Transceiver · Boeing 737990ER

FAA SDR system

Difficulty date
December 11, 2020
Submitted
December 15, 2020
Operation
Air carrier
Aircraft
N464AS
Make and model
Boeing 737990ER
Aircraft serial
40714
Aircraft time
25,469 hours, 8,025 cycles
System (JASC)
2310 · HF Communications System
Part
Transceiver
Part number
8220990004
Part serial
40CHRF
Condition
Failed
Location
Nr 2 Hf Comms
Part time
25,469 hours, 8,025 cycles
Stage of operation
TX
How discovered
O
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ON PREFLIGHT, "FAIL" ON HF2 RADIO. GROUNDED-YES. VERIFIED FAULT, ACCOMP. HF NR 2 TRANSCEIVER BITE TEST, TEST FAILS TO LIGHT UP ANY INDICATIONS. CYCLED C/B NO HELP. REPLACED HF NR 2 TRANSCEIVER WITH SERVICEABLE ONE. ACCOMPLISHED TRANSCEIVER INSTALLATIONN TEST, TEST PASS, REF B737-900 FIM 23-11 TASK 802 & B737-900 AMM 23-11-21-400-801.