What was found
HF RADIO TRANSMISSION PROBLEM. RT HF WILL NOT TUNE. CYCLED RT HF THRU FREQ 3.000 TO 15.000MHS IN 1 MHZ STEPS. CHECKED THAT NORMAL TUNE TONE AND TRANSMISSION EACH STEP. CHECKED RX WITH WWV AT 5.000, 10.00 0 MHZ. RT HF CHECKS OK PER MM.
- Difficulty date
- December 20, 2012
- Submitted
- January 28, 2013
- Operation
- Air carrier
- Aircraft
- N221UA
- Make and model
- Boeing 777222
- Aircraft serial
- 30552
- Aircraft time
- 48,354 hours, 6,035 cycles
- Engine
- Pwa PW40903
- System (JASC)
- 2310 · HF Communications System
- Part
- Radio
- Condition
- Malfunctioned
- 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.