- Difficulty date
- April 18, 2023
- Submitted
- April 20, 2023
- Operation
- Air carrier
- Make and model
- Boeing 7379
- Aircraft serial
- 44089
- Aircraft time
- 4,723 hours, 1,388 cycles
- Part
- Transceiver
- Part number
- 8220990004
- Part serial
- 4R5N45
- Condition
- Faulty
- Location
- Aft E/E Rack, E6
- Part time
- 4,711 hours, 1,384 cycles
- Stage of operation
- NR
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HF # 2 RTP INDICATES FAIL. GROUNDED - YES. INTIAL TROUBLESHOOTING REVEALED MAINTENANCE MESSAGE 23-21042 UNDER PRESENT LEG FAULTS. FOUND 5 INTERMITTENT FAULTS, AND 2 HARD FAULTS. BITE TEST ON LRU HF # 2 SHOWED GREEN. PRECAUTIONARY REMOVED AND REPLACED HF # 2 TRANSCEIVER REF B737-9 AMM 23-11-21/401. GROUND VERIFICATION SUCCESSFUL.