# SDR ASAA2016122919198

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 29, 2016
- Submitted: January 4, 2017
- Operation: Air carrier
- Aircraft: [N579AS](https://openairdocs.org/aircraft/N579AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35187
- Aircraft time: 37,505 hours, 11,207 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 4082260939
- Part serial: 00082228
- Condition: Intermittent
- Location: Cockpit
- Part time: 55,519 hours, 20,259 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016122919198

## Discrepancy

F/O'S COURSE SELECTOR INTERMITTENTLY WILL NOT SELECT 163 DEGREES. GROUNDED - YES. CONFIRMED. REMOVED & REPLACED DFCS MODE CONTROL PANEL, REF AMM 22-11-34. OPS NORMAL PER SAME. DFCS LRU INTERFACE TEST BITE NR 32 AND LAND VERIFY NR 49 GOOD, REF AMM 22-11-00. HGS SENSOR TEST FOR FCC / AT GOOD, REF SMM 34-36-00. A/C REMAINS CAT IIIA AUTOLAND-HGS QUALIFIED. LWMP STATUS PLACARD CHECKED. STATUS SCREW IS IN CAT IIIA - HGS QUALIFIED POSITION.

---
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.