SDR ASAA1057204

Service difficulty report · Unknown · Boeing 737890

Difficulty date: January 6, 2010
Submitted: January 7, 2010
Operation: Air carrier
Aircraft: N585AS
Make and model: Boeing 737890
Aircraft serial: 35683
Aircraft time: 8,949 hours, 2,707 cycles
System (JASC): 2310 · HF Communications System
Part: Unknown
Condition: Malfunctioned
Location: Hf Comm
Stage of operation: NR
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

WHILE USING EITHER HF RADIO SIDTONE IN HEADSETS SEEMS TO FADE IN & OUT. THIS HAPPENS FROM BOTH CAPT & F/O SIDE. ARINC REPORTS RECEIVING ENTIRE TRANSMISSIONS WITH NO PROBLEMS. PERFORMED HF COMMUNICATION SYSTEM BITE TEST IAW FIM 23 11 TASK 801 BITE TESTS GOOD. PERFORMED HF COMMUNICATIONS SYSTEM TEST IAW MM 23 11 00 730 801. HF COMMUNICATION SYSTEM. SYSTEM TEST IS GOOD. NO HISTORY FOR 30 DAYS. SEAMC NOTIFIED TIME CALL 01:56.