What was found
HF #1 FAILED. GROUNDED - YES. CONFIRMED HF1 FAILED ON RAMP AND CONTINUOUS AUDIBLE TONE. RESET HF1 AND PERFORMED OPS CHECK OF HF1. FAIL MESSAGE EXTINGUISHED AND OPERATION TEST OF HF1 COMPUTER OK REF B737-900 AMM 23-11-00-710-801.
- Difficulty date
- October 7, 2021
- Submitted
- October 8, 2021
- Operation
- Air carrier
- Aircraft
- N481AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44106
- Aircraft time
- 22,954 hours, 7,302 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.