# SDR ASAA2022120741040

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2022
- Submitted: December 12, 2022
- Operation: Air carrier
- Aircraft: [N471AS](https://openairdocs.org/aircraft/N471AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41703
- Aircraft time: 30,508 hours, 9,538 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autoland Sys
- Part number: UNKNOWN
- Condition: Faulty
- Location: Unknown
- Stage of operation: LD
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022120741040

## Discrepancy

ATTEMPTED AUTOLAND TO 16R SEA AIRCRAFT WAS 6O' LEFT OF CENTERLINE AND DRIFTING FARTHER OFF WITH A MINIMAL CROSSWIND. AUTOPILOT HAD TO BE DISCONNECTED TO CORRECT ONTO CENTERLINE. GROUNDED - YES. REF B737-900 FIM 22-11 TASK 825 PERFORMED LAND VERIFY TEST. ALL TEST 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.