What was found
LEFT HF RADIO DOES NOT TUNE, CHECKED GOOD ON GROUND. CMC MESSAGE 23035, HF-L COUPLER FAILED. SATCOM OPS NORMAL. REPLACED LT HF TRANSCEIVER AS PER MM.
- Difficulty date
- March 19, 2013
- Submitted
- April 25, 2013
- Operation
- Air carrier
- Aircraft
- N120UA
- Make and model
- Boeing 747422
- Aircraft serial
- 29166
- Aircraft time
- 57,440 hours, 6,678 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 2310 · HF Communications System
- Part
- Transceiver
- Part number
- 6225272120
- Part serial
- 163
- Condition
- Faulty
- Location
- Hf System
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.