# SDR ASAA2017071521375

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 15, 2017
- Submitted: July 25, 2017
- Operation: Air carrier
- Aircraft: [N457AS](https://openairdocs.org/aircraft/N457AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36355
- Aircraft time: 13,810 hours, 4,563 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autoland Sys
- Condition: Malfunctioned
- Stage of operation: AP
- 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/ASAA2017071521375

## Discrepancy

AUTOLAND UNSUCCESSFUL DUE TO LEFT OF CENTERLINE DURING APPROACH.  ACFT GROUNDED.  ACCOMPLISHED MAINTENANCE PRACTICE FOR LLM SPECIAL CONDITION, INBOUND CONDITION RELATED TO AUTOLAND IAW AMM 22-00-01-730-807, ALL TESTS PASSED. ALSO PERFORMED HGS SYSTEM TEST IAW SMM 34-36-00,  ALL TESTS PASSED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.