# SDR ASAA2018122637562

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2018
- Submitted: December 27, 2018
- Operation: Air carrier
- Aircraft: [N467AS](https://openairdocs.org/aircraft/N467AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36362
- Aircraft time: 18,002 hours, 6,025 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/ASAA2018122637562

## Discrepancy

UNSUCCESSFUL HGS AUTOLAND. SECOND AUTO PILOT WAS ENGAGED COMPLETED SELF CHECK THEN DROPPED AUTOPILOT A. GROUNDED - YES. ACCOMPLISHED DFCS BITE WITH NO CURRENT FAULTS OR FAULT HISTORY. RAN LAND VERIFY TEST, BITE GROUP 49, TEST PASS. ACCOMPLISHED ALL REQUIRED LLM TEST FOR MEL 22-99C, ALL TEST PASS. REF B737-900 AMM 22-11-00,22-00-01, 22-11-33. GROUND VERIFICATION SATISFACTORY.

---
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.