# SDR ASAA2021082835817

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2021
- Submitted: August 31, 2021
- Operation: Air carrier
- Aircraft: [N483AS](https://openairdocs.org/aircraft/N483AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36350
- Aircraft time: 22,177 hours, 7,057 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Faulted
- Stage of operation: CR
- 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/ASAA2021082835817

## Discrepancy

FO A/S BUG WOULD NOT RECOGNIZE RTA WPT (YYJ) FMC SPEED CAPT A/S BUG WAS .59 MACH, FO A/S BUG WAS .72 MACH. A/S BUGS WOULD ONLY MATCH WHEN DESIRED SPEED WAS SET INTO VNAV PAGE 2 (CRUISE). GROUNDED - YES. FMC LEFT & RIGHT, NO FLIGHT FAULTS BOTH BOTH OPS NML REF B737-900 FIM 34-61 TASK 801. FCC A&B NO FLIGHT FAULTS REF FIM 22-11 TASK 801. NO A/C HISTORY 90 DAYS. ETOPS GND VERIFICATION TEST SUCCESSFUL. SEAMC ROWAN NOTIFIED.

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