# SDR ASAA2022091539972

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 15, 2022
- Submitted: September 20, 2022
- Operation: Air carrier
- Aircraft: [N491AS](https://openairdocs.org/aircraft/N491AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44109
- Aircraft time: 25,408 hours, 8,016 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autopilot Sys
- Condition: Disengaged
- Stage of operation: AP
- 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/ASAA2022091539972

## Discrepancy

APPROACH WARNING ON PRACTICE HGS APPROACH, RWY 16R AUTOPILOT DISENGAGE @ 15'. GROUNDED - YES. ACCOMPLISHED HGS SYSTEM TEST ROCKWELL COLLINS HGS 4000 SMM 34-36-00. DFCS LAND VERIFY TEST IAW B737-900 AMM 22-11-00 OPS CK NORMAL.

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