# SDR ASAA2013051994860

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 19, 2013
- Submitted: May 23, 2013
- Operation: Air carrier
- Aircraft: [N508AS](https://openairdocs.org/aircraft/N508AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35691
- Aircraft time: 18,389 hours, 5,752 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 4082260939ASA
- Part serial: 01012356
- Condition: Failed
- Location: Flight Deck
- Part time: 44,599 hours, 16,196 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2013051994860

## Discrepancy

MCP CMD-B LIGHT OUT.  ACFT GROUNDED.  R & R DFCS MODE CONTROL PANEL REF MM 22-11-34-400-801.  OPS CK NORMAL.  PERFORMED ADDITIONAL LWMP TESTS, DFCS LRU INTERFACE TEST FOR MCP GROUP NR 32 REF MM 22-11-34/501.  LAND VERIFY TEST GROUP NR 49 IAW MM 22-11-00/201, HGS SENSOR DATA TEST FOR FCC/AT REF SMM 34-36-00.  ALL OPS CKS GOOD.

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