# SDR ASAA2017111822612

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 18, 2017
- Submitted: November 20, 2017
- Operation: Air carrier
- Aircraft: [N403AS](https://openairdocs.org/aircraft/N403AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41730
- Aircraft time: 20,238 hours, 6,642 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autoland Sys
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: LD
- How discovered: O
- Nature of condition: F
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017111822612

## Discrepancy

AUTOLAND UNSUCCESSFUL. REQUIRED INTERVENTION BEFORE NOSE WHEEL REACHED THE RUNWAY DUE TO ABNORMALLY HIGH PITCH ANGLE. CRITICAL AREA WAS PROTECTED; TOUCHDOWN OCCURRED IN THE TOUCHDOWN ZONE, BUT NOSE WHEEL CONTINUED TO PITCH UP AFTER MAIN WHEELS TOUCHED. HGS MONITOR FUNCTIONED PROPERLY. GROUNDED - YES. DFCS CURRENT STATUS TEST (BITE GRP 20) SHOWS NO FAULTS. FAULT HISTORY OF CHANNEL A OR B FOR NOV 18 LEGS SHOWED NO FAULTS RELATED TO ELEVATOR OR ILS DURING USE. PERFORMED DFCS LAND VERIFY TEST (BITE GRP 49) PER AMM 22-11-00/201, TEST PASSED. PERFORMED DFCS ELEVATOR SURFACE TEST (BITE GROUP 60.31) PRECAUTIONARY PER AMM 22-11-00, TEST PASSED. NO PREVIOUS HISTORY. THIS CLEARS MEL 22-20B, 22-99B.

---
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.