# SDR ASAA2022090339791

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 3, 2022
- Submitted: September 6, 2022
- Operation: Air carrier
- Aircraft: [N472AS](https://openairdocs.org/aircraft/N472AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 60580
- Aircraft time: 27,684 hours, 8,556 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Lamp
- Part number: 1741010303
- Part serial: 004400
- Condition: Cracked
- Location: Flight Deck
- Part time: 27,674 hours, 8,553 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/ASAA2022090339791

## Discrepancy

MULTIPLE MODE SELECT BUTTONS ON FO FMC INOP. GROUNDED - YES. REMOVED AND REPLACED FO'S MCDU ASSEMBLY PER B737-900 AMM 34-61-01.

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