# SDR ASAA2023021741984

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 17, 2023
- Submitted: February 22, 2023
- Operation: Air carrier
- Aircraft: [N494AS](https://openairdocs.org/aircraft/N494AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41729
- Aircraft time: 25,869 hours, 7,914 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Transmitter
- Part number: H504C
- Part serial: 158683
- Condition: Faulty
- Location: Rt Wing Spoiler
- Part time: 25,978 hours, 7,948 cycles
- Stage of operation: LD
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023021741984

## Discrepancy

UNSUCCESFUL AUTOLAND APPROX 100 FT AGI. A/P DRIFTED LEFT OF COURSE, APPROX 75 FT. GROUNDED - YES. DFCS 1 & 2 BITE SHOWS NO FAULTS LOGGED. HGS SHOWS APP WARN XTK RATE EXCEED FAULT. REMOVED/REPLACED AND ADJUSTED M930, SPOILER 9 POSITION SENSOR REF B737-900 AMM 22-11-27/401. SPOILER POSITION SENSOR TEST NORMAL. REF AMM 22-11-27-710-801. LAND AND VERIFY TEST NORMAL REF AMM 22-11-00-700-801. HGS OPERATIONAL TEST NORMAL. REF HGS 4000 SMM 34-36-00.

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