SDR ASAA2020012403905

Service difficulty report · Hf Comm · Boeing 737890

Difficulty date: January 20, 2020
Submitted: January 25, 2020
Operation: Air carrier
Aircraft: N557AS
Make and model: Boeing 737890
Aircraft serial: 35176
Aircraft time: 51,961 hours, 15,158 cycles
System (JASC): 2310 · HF Communications System
Part: Hf Comm
Condition: Malfunctioned
Location: Nr 1 & 2
Stage of operation: CR
How discovered: O
Nature of condition: O
Precautionary procedure: A

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

What was found

HF #1 AND HF #2 NO COMM, WE COULD HEAR THE SIDE TONE CHANGING FREQS. BUT WE COULD NOT MAKE CONTACT WITH SFO RADIO OR HEAR OTHER AIRCRAFT. GROUNDED - YES. DIVERSION TIME 53 MINUTES - ACCOMPLISHED B737-800 FIM 23-11 TASK 806 & AMM 23-11-00-710-801, CONTACTED SFO RADIO, BOTH #1 & #2 HF RADIO, OPS CK NML.