# SDR ASAA2019051529360

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 15, 2019
- Submitted: May 17, 2019
- Operation: Air carrier
- Aircraft: [N464AS](https://openairdocs.org/aircraft/N464AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40714
- Aircraft time: 20,271 hours, 6,541 cycles
- System (JASC): [2310 · HF Communications System](https://openairdocs.org/jasc/2310)
- Part: Unknown
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: NR
- 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/ASAA2019051529360

## Discrepancy

INFO ONLY "SAT" OPTION NOT DISPLAYED ON CAPT'S MCDU, IS DISPLAYED ON F/O MCDO. GROUNDED - YES. COMPLETED SAT LOCK-UP B737 QRH WITH NO RESULT TESTED SATCOM USING F/O MCDO AND FUNCTIONED PROPERLY BUT STILL NO "SAT" ON CAPT'S MENU UNTIL APPROX 1.5 HRS THEN "SAT" AVAILABLE ON BOTH CDU'S.

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