What was found
HF LT DOES NOT STAY TUNED..TUNES FINE THEN AFTER A FEW XMISSIONS..RETUNES. SUPPLEMENTAL DATA UPDATE REMOVED AND REPLACED L HF COUPLER. NEEDS OP CHK AND COAX CONNECTOR SAFETY WIRING.
- Difficulty date
- June 8, 2010
- Submitted
- June 15, 2010
- Operation
- Air carrier
- Aircraft
- N222UA
- Make and model
- Boeing 777222
- Aircraft serial
- 30553
- Aircraft time
- 37,312 hours, 4,569 cycles
- Engine
- Pwa PW40903
- System (JASC)
- 2310 · HF Communications System
- Part
- Coupler
- Part number
- 490S1
- Part serial
- 272
- 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.