# SDR ASAA2019070929986

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 9, 2019
- Submitted: July 11, 2019
- Operation: Air carrier
- Aircraft: [N448AS](https://openairdocs.org/aircraft/N448AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36356
- Aircraft time: 13,142 hours, 4,300 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Unknown
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: AP
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019070929986

## Discrepancy

AT GLIDESLOPE CAPTURE AUTOPILOT B ON LOST GLIDESLOPE INDICATION ON BOTH PFD. LOCALIZER MOVED FULL RIGHT AND CAME BACK TO CENTER BACKWARDS. GROUNDED - YES. WHILE ON L NAVAPP FMC SHOWS FAULT MSG 22-11822 DURING DFCS FAULT REVIEW FOR B A/P. REF FIM 22-11 TASK 801 - NO CURRENT FAULTS. ACCOMPLISHED FIM 22-11 TASK 811 FOR FMC DATA INVALID - RE-RAN DFCS BITE REF FIM 22-11 TSK 801- NO FAULTS NOTED. PRECAUTIONARY ACCOMPLISHED DFCS LAND VERIFY REF AMM 22-11-00-700-801 -ALL TESTS PASS. ETOPS GROUND VERIFICATION COMPLETE. NOTE : NO FAULTS ON FMC 1& 2 BITE OR CDS BITE.

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