# SDR ASAA2022032437783

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 24, 2022
- Submitted: March 30, 2022
- Operation: Air carrier
- Aircraft: [N483AS](https://openairdocs.org/aircraft/N483AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36350
- Aircraft time: 24,256 hours, 7,670 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: None
- Part number: UNKNOWN
- Condition: None
- Location: Unknown
- Stage of operation: CL
- 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/ASAA2022032437783

## Discrepancy

MCP VERTICAL SPEED SKIPS DIGITS WHEN SELECTING CLIMB (1000 FPM CLB ONE CLICK ON WHEEL WILL JUMP TO A 1500' PER MIN CLB OR DROP TO A 900 FPM CLB). AIRSPEED KNOB SKIPS DIGITS. AIRSPEED SELECTED AT 248 ONE CLICK RIGHT WITH KNOB AIRSPEED JUMPS TO 251. ALL OTHER INSTRUMENTS ACT NORMAL. GROUNDED - YES. PERF DFCS BITE IAW B737-900 FIM 22-11 TASK 801. NO FAULTS FOUND. PERF C/B RESET OF MCP IAW B737-900 AMM 22-11-34. PERF MCP INSTL TEST IAW AMM 22-11-34-740-801, NO FAULTS.

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