# SDR ASAA2017082621716

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 26, 2017
- Submitted: August 30, 2017
- Operation: Air carrier
- Aircraft: [N462AS](https://openairdocs.org/aircraft/N462AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36362
- Aircraft time: 13,225 hours, 4,366 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 8221567102
- Part serial: 4282H7
- Condition: Failed
- Location: Flight Deck
- Part time: 13,271 hours, 4,380 cycles
- Stage of operation: IN
- 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/ASAA2017082621716

## Discrepancy

DURING LLM TESTS FOR NOTED L/P,  MODE CONTROL PANEL VERTICAL SPEED ANNUCIATOR READOUT WINDOW HAS BACK LIGHTING BLEED THRU.  ACFT GROUNDED.  REMOVED & REPLACED THE MODE CONTROL PANEL.  OPS GOOD. GROUND VERIFICATION SUCCESSFUL IAW AMM 22-11-34/401.

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