SDR ASAA12511173

Service difficulty report · Hf Comm · Boeing 737890

Difficulty date: March 3, 2012
Submitted: March 6, 2012
Operation: Air carrier
Aircraft: N514AS
Make and model: Boeing 737890
Aircraft serial: 35193
Aircraft time: 12,907 hours, 4,122 cycles
System (JASC): 2310 · HF Communications System
Part: Hf Comm
Condition: Malfunctioned
Location: Cockpit
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

JUST PAST ZEMOM INTERSECTION FL 370 NE BOUND FROM 0029Z TO 0039Z LOST BOTH HF RADIOS. NO STATIC SIDETONE NO TRANSMIT NO RECEIVE OR MICROPHONE CLICKS. PULLED AND RESET HF2 CB. NR 1 HF CAME BACK ON LINE BUT NR 2 HF STILL INOP. AFTER ABOUT 1 HOUR HF NR 2 CAME ALIVE. VFR CHECK AIRBORNE HF RADIOS 1 2 OPS CHECK GOOD. SELCAL CHECK WITH SFO RADIO GOOD. GOOD SIDETONE. FLIGHT VERIFICATION SATISFACTORY.