# SDR ASAA2018093026329

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 30, 2018
- Submitted: October 3, 2018
- Operation: Air carrier
- Aircraft: [N566AS](https://openairdocs.org/aircraft/N566AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35182
- Aircraft time: 45,220 hours, 13,561 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Unknown
- Condition: Malfunctioned
- Location: Cockpit
- Part time: 45,252 hours, 13,569 cycles
- 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/ASAA2018093026329

## Discrepancy

A AUTOPILOT DISCONNECTS AND WILL NOT ENGAGE IN APPROACH MODE CAPTAINS RAW DATA WAS NORMAL BUT CAPTAINS F/D VERTICAL AND LATERAL BARS DISAPPEARED. ALL OTHER MODES WORKED NORMALLY A/P & F/D IN CMD A INFO ONLY ALL CMD B A/P AND F/D MODES WORKED NORMALLY. GROUNDED - YES. ACCOMPLISHED DFCS BITE FIM 22-11 TASK 801. NO DEFECTS NOTED. LEG 06 SHOWS MESSAGE 11051. ACCOMPLISHED FIM 22-11 TASK 805, RA OUTPUT PROBLEM FOR RA NR 1. LRRA BITE SHOWS NO FAULTS. ACCOMPLISHED LAND VERIFY REF AMM 22-11-00-700-801, NO FAULTS. AS A PRECAUTION, REF AMM 34-33-21 REMOVED AND REPLACED NR 1 RA/RT. OPS TEST NORMAL.

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