# SDR ASAA2022020837406

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 8, 2022
- Submitted: February 15, 2022
- Operation: Air carrier
- Aircraft: [N589AS](https://openairdocs.org/aircraft/N589AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35686
- Aircraft time: 51,483 hours, 15,173 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Lamp
- Condition: Inoperative
- Location: Flight Deck
- Part time: 43,783 hours, 15,318 cycles
- Stage of operation: NR
- 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/ASAA2022020837406

## Discrepancy

A/P A CMD BUTTON ON MCD HAS 1 BULB INOP. A/P A FUNCTIONS NORMALLY. GROUNDED - YES. REMOVED AND REPLACED DFCS MODE CONTROL PANEL IAW B737-800 AMM 22-11-34/401. MCP LRU REPLACEMENT TESTS PASSED.

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