# SDR ASAA2019032128741

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 21, 2019
- Submitted: March 25, 2019
- Operation: Air carrier
- Aircraft: [N579AS](https://openairdocs.org/aircraft/N579AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35187
- Aircraft time: 45,797 hours, 13,592 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Satcom
- Condition: Locked
- Location: Cockpit
- Stage of operation: TX
- 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/ASAA2019032128741

## Discrepancy

SATCOM LOCKUP ON PWR TRANSFER EXT TO APU. GROUNDED - YES. ACCOMPLISHED RESET PROCEDURE PER QRH. CLEARED SATCOM LOCKUP.

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