# SDR ASAA2017120822881

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2017
- Submitted: December 14, 2017
- Operation: Air carrier
- Aircraft: [N577AS](https://openairdocs.org/aircraft/N577AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35186
- Aircraft time: 40,710 hours, 12,157 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autoland Sys
- Condition: Malfunctioned
- Stage of operation: LD
- 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/ASAA2017120822881

## Discrepancy

UNSUCCESFUL AUTOLAND AIRCRAFT DRIFT MORE THAN 35 FEET LEFT OF CENTELINE WITHIN 200 FT OF RUNWAY. GROUNDED - YES. REF B737-800 FIM 22-11-00-810-825, B737-800 AMM 22-00-01-730-807, 22-00-01-730-808, HGS-4000 SMM 34-36-00. DFCS BITE GRP#20 FRM, SHOWS NO CURRENT FAULTS OR IN HISTORY. ACCOMPLISHED LAND VERIFY BITE GRP# 49. HGS SLOWS NO CURRENT FAULTS. LEG 01 SHOWS FC 70/71. NO HISTORY 30 DAYS ON THESE MESSAGES. SYSTEM TEST ACCOMPLISHED. ALL REQUIRED TESTS PASSED.

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