SDR ASAA12511068

Service difficulty report · Unknown · Boeing 737890

Difficulty date: February 7, 2012
Submitted: February 9, 2012
Operation: Air carrier
Aircraft: N594AS
Make and model: Boeing 737890
Aircraft serial: 35191
Aircraft time: 14,860 hours, 4,641 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

PASSING SEDAR FIX COULD NOT RECEIVE SFO RADIO ON THE HF 1 OR 2 . COULD HEAR OUR OWN SIDE TONE WHEN TRANSMITTING AND SFO REPORTED TO OTHER FLIGHTS THAT THEY WERE RECEIVING US. NOTE: PRIOR TO PUSH AND AFTER RADIO CHECK ON THE GROUND IN SEA THE EXTERNAL PWR WAS PULLED PREMATURELY POWER WAS LOST UNTIL THE APU WAS STARTED AND PLACED ON THE BUSES. NR 1 AND NR 2 HF OP'S CHECK PER AMM 23 11 00 730 801. OP'S CHECK NORMAL.