What was found
TESTED TRANSMISSION OF BOTH HF1 AND HF2 AS DIRECTED BY SEAMC. BOTH RADIOS FAILED TO MAKE CONTACT WITH SFO RADIO. 5 DIFFERENT FREQS WERE ATTEMPTED. FREQS WERE ASSIGNED BY SFO RADIO. GROUNDED - YES. ON DEFERRAL.
- Difficulty date
- August 3, 2023
- Submitted
- August 7, 2023
- Operation
- Air carrier
- Aircraft
- N409AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41733
- Aircraft time
- 38,025 hours, 12,111 cycles
- System (JASC)
- 2310 · HF Communications System
- Part
- Unknown
- Part number
- UNKNOWN
- Condition
- Unknown
- Location
- Unknown
- Stage of operation
- NR
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.