SDR ASAA1058692

Service difficulty report · Unknown · Boeing 737890

Difficulty date: December 23, 2010
Submitted: December 28, 2010
Operation: Air carrier
Aircraft: N563AS
Make and model: Boeing 737890
Aircraft serial: 35180
Aircraft time: 15,814 hours, 4,963 cycles
System (JASC): 2310 · HF Communications System
Part: Unknown
Condition: Malfunctioned
Location: Hf Comm
Stage of operation: CR
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

UNABLE TO TRANSMIT OR RECEIVE ON HF1 RETURNED AT LEAST 4 TIMES. DATA SEEMED TO WORK INTERMITTANTLY. "NO COMM" MESSAGE DISPLAYED OFTEN DURING FLIGHT. HF2 WORKED FINE ON ALL FREQUENCIES. PERFORMED HF COMM SYSTEM TEST 23 11 00 NO FAULTS FOUND PERFORMED HF COMM OPS TEST 23 11 00 NO FAULTS FOUND. PERFORMED TASK 23 11 00 810 806 IN FIM NO FAULTS FOUND. SFO REPORTS 5X5 RADIO CHECK. NO HISTORY OF FAULT IN TRAX. CONFIRMED HF 1 OPERATING CORRECTLY.