# SDR ASAA2022041638036

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 16, 2022
- Submitted: April 18, 2022
- Operation: Air carrier
- Aircraft: [N535AS](https://openairdocs.org/aircraft/N535AS), registered now
- Make and model: Boeing 737
- Aircraft serial: 35200
- Aircraft time: 41,082 hours, 11,781 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Unknown
- Part number: 8220990004
- Part serial: 18PK7H
- Condition: None
- Location: E/E Rack E8
- Part time: 28,333 hours, 8,576 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022041638036

## Discrepancy

HF2 SHOWS "FAIL" IN COMM HEAD. GROUNDED - YES. 2ND WRITE UP IN TWO DAYS. SYSTEM HAS BEEN RESET BUT AS PRECAUTIONARY REMOVED AND REPLACED HF #2 TRANSCEIVER IAW B737-800 AMM 23-11-21-000-810 AND AMM 23-11-21-400-801. ETOPS GROUND VERIFICATION GOOD IAW AMM 23-11-00-710-801,

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