# SDR ASAA2021052534922

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 25, 2021
- Submitted: May 28, 2021
- Operation: Air carrier
- Aircraft: [N462AS](https://openairdocs.org/aircraft/N462AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36362
- Aircraft time: 26,219 hours, 8,467 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Warning Message
- Condition: False Activation
- Location: Nr 1 Hf Radio
- Stage of operation: TX
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021052534922

## Discrepancy

DURING PREFLIGHT HF 1 RADIO DISPLAYS FAIL IN ACTIVE & STANDBY WINDOWS. GROUNDED - YES. REBOOTED #1 HF XCVR. OPS CK OF #1 HF SYS OK REF B737-900 FIM 23-11 TASK 802 & 23-11 TASK 801 NORM OPS RESTORED #1 H/F BITE CK OK. VERIFIED H/F #1 XMITS NORM ON GROUND. ETOPS GROUND VERIFICATION COMPLETE.

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