# SDR ASAA2023040942786

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 9, 2023
- Submitted: April 11, 2023
- Operation: Air carrier
- Aircraft: [N537AS](https://openairdocs.org/aircraft/N537AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35204
- Aircraft time: 41,216 hours, 11,928 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Panel
- Part number: G716401
- Part serial: 463
- Condition: Faulty
- Location: Flight Deck
- Part time: 26,755 hours, 8,381 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/ASAA2023040942786

## Discrepancy

THE HF/ UPPER HALF OF THE #1 HF/ SAT XFER SWITCH LIGHT IS DARK. IT DOES HOWEVER ILLUMINATE DURING LIGHTS TEST. HF RADIO #1 APPERA TO BE WORKING NORMALLY. GROUNDED - YES. REMOVED AND REPLACED HF/ SAT PANEL REF B737-800 AMM 23-15-00. OPS CHECK GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.