# SDR ASAA2021032034330

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 2021
- Submitted: March 30, 2021
- Operation: Air carrier
- Aircraft: [N468AS](https://openairdocs.org/aircraft/N468AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41735
- Aircraft time: 25,145 hours, 8,092 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autopilot Sys
- Condition: Malfunctioned
- Stage of operation: AP
- How discovered: O
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021032034330

## Discrepancy

AT 100' AGL, AUTOPILOT INPUTED AGGRESSIVE CORRECTION. THE INPUT WAS NOT NECESSARY. APPROACH WARN ILLUMINATED. AUTOPILOT WAS MANUALLY DISCONNECTED. LANDED UNEVENTFULLY. GROUNDED - YES. PERFORMED LAND VERIFY REF B737-900 AMM 22-11-00-700-801 ALL BITE LIBRARY TEST PASS. HGS SYSTEM TEST REF HGS 4000 SMM 34-36-00 TEST PASS.

---
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.