# SDR ASAA2020012732032

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 27, 2020
- Submitted: January 31, 2020
- Operation: Air carrier
- Aircraft: [N434AS](https://openairdocs.org/aircraft/N434AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 61620
- Aircraft time: 15,361 hours, 4,858 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/ASAA2020012732032

## Discrepancy

ON TOUCHDOWN AUTOLAND APPROACH, AIRCRAFT TOUCHED DOWN IN TOUCHDOWN ZONE AND IMMEDIATLY DEVIATED LEFT OFF CENTERLINE. GROUNDED - YES. DFCS FAULT HISTORY SHOWS NO FAULTS. ACCOMPLISHED DFCS LAND VERIFY TEST (GP 49) IAW AMM 22-11-00 & HGS SYSTEM TEST IAW SMM 34-36-00, OPS CHECKED NORMAL.

---
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.