# SDR ASAA2023031742401

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 17, 2023
- Submitted: March 21, 2023
- Operation: Air carrier
- Aircraft: [N442AS](https://openairdocs.org/aircraft/N442AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43293
- Aircraft time: 34,644 hours, 10,937 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- 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/ASAA2023031742401

## Discrepancy

AFTER POWER TRANSFER, SATCOM LOCKUP OCCURRED. FOLLOWED QRH PROCEDURE. SAT RETURNED TO NORMAL OPS AFTER NEXT POWER TRANSFER LOCKUP OCCURRED AGAIN. GROUNDED - YES.  REF L/P 60589552 -- ACCOMPLISHED SDU SOFTWARE LOAD REF B737-900 AMM 23-15-00-470-801 3 FILES LOADED "CONFIG CRC" AC391300 VERIFIED, CIM OPTIONS SAVED. VERIFIED AOC DIR NUMBERS PRESENT. SATCOM SYSTEM TEST PASS REF AMM 23-15-00-730-801 CALLS MADE AND RECEIVED WITH DISPATCHED ALONG WITH TWO STAGE CALL TO AIRCRAFT.

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