# SDR ASAA2016060516950

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 5, 2016
- Submitted: June 7, 2016
- Operation: Air carrier
- Aircraft: [N513AS](https://openairdocs.org/aircraft/N513AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35192
- Aircraft time: 29,753 hours, 8,961 cycles
- System (JASC): [2200 · Auto Flight System](https://openairdocs.org/jasc/2200)
- Part: Autopilot Sys
- Condition: Malfunctioned
- Location: B System
- Stage of operation: AP
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016060516950

## Discrepancy

AUTOPILOT B DISENGAGED WHEN INTERMITTENT RA FLASHED BELOW 1,000 ON ILS APPROACH. ACFT GROUNDED. NO CURRENT FAULTS, LAST LEG SHOWED RADIO ALTIMETER DATA INVALID AT 1,295 FT.  PERFORMED LRRA DFCS GROUP NR 40, NO DEFECTS NOTED.  ALSO PERFORMED LAND VERIFY TEST, REF AMM 22-11-00/201.  NO DEFECTS NOTED.  ACFT REMAINS AUTOLAND CAT III QUALIFIED.

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