# SDR TSAA0123113

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 16, 2001
- Submitted: December 5, 2001
- Operation: Air carrier
- Aircraft: N808AL
- Make and model: Boeing 737-2T4
- Registry model: [Boeing 737-2T4](https://openairdocs.org/model/boeing-737-2t4) (OpenAirDocs)
- Aircraft serial: 23445
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Transceiver
- Part number: 6223371001
- Condition: Malfunctioned
- Location: Hf Comm
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TSAA0123113

## Discrepancy

FLT 351 - HNL-JON - DURING THE VERIFICATION PHASE OF FLIGHT AND CHECKING THE HF RADIO SYSTEM, THE NR 1 HF HAD NO TUNE AND THE TRANSMIT WAS INOPERATIVE.  RETURNED TO HNL FOR AN OVERWEIGHT LANDING, VERY LOW SINK RATE.  REPLACED NR 1 HF TRANSCEIVER (P/N 6223371001).  OPS CHECK ON GROUND WITH SFO AND SELCAL CHECK OK.  VERIFICATION FLIGHT REQUIRED.  PERFORMED OVERWEIGHT LANDING INSPECTION IAW FORM M-121.  NO DEFECTS NOTED IN PHASE 1 STEP 2A.  OK FOR SERVICE.  SUBSEQUENTLY, THE HF COUPLER WAS REPLACED (P/N 792-6140-001) AND VERIFIED AS THE CAUSE.  AIRCRAFT RETURNED TO SERVICE.  (M)

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