# SDR ASAA2017031320155

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 13, 2017
- Submitted: March 15, 2017
- Operation: Air carrier
- Aircraft: [N474AS](https://openairdocs.org/aircraft/N474AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40715
- Aircraft time: 6,809 hours, 2,251 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autoland Sys
- Condition: Malfunctioned
- Stage of operation: LD
- 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/ASAA2017031320155

## Discrepancy

HGS / AUTOLAND CATIII UNSUCCESSFUL.  ACFT GROUNDED. PERFORMED REQUIRED LWMP TESTS IAW AMM 22-00-01. PERFORMED FIM 22-11, TASK 801, BITE 20,  AND 22-11-00/200, BITE 49.  ALL TESTS OK. PERFORMED HGS SYSTEM TEST IAW SMM 34-36-00. TESTED OK.

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