# SDR 2010FA0000367

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 16, 2010
- Submitted: April 16, 2010
- Operation: General aviation
- Aircraft: VTKMB
- Make and model: Cessna S550
- Registry model: [Cessna S550](https://openairdocs.org/model/cessna-s550) (OpenAirDocs)
- Aircraft serial: 0135
- Aircraft time: 3,672 hours, 3,213 cycles
- System (JASC): [3415 · High Speed Warning](https://openairdocs.org/jasc/3415)
- Part: Switch
- Part number: 991207612
- Part serial: 259
- Condition: Inoperative
- Location: Cockpit
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2010FA0000367

## Discrepancy

OVERSPEED WARNING INOPERATIVE. TESTED ON GROUND AND FOUND OVERSPEED WARNING SWITCH, P/N 9912076-12, S/N 173 TO BE OUT OF CALIBRATION.  REMOVED AND REPLACED SWITCH WITH OVERHAULED UNIT, S/N 259.  TESTED AND UNIT FAILED.  R & R SWITCH WITH INSPECTED UNIT, S/N 09J108.  TESTED AND UNIT FAILED.  REMOVED AND REPLACED SWITCH WITH OVERHAULED UNIT, S/N 152.  TESTED AND UNIT FAILED.  REMOVED AND REPLACED SWITCH WITH OVERHAULED UNIT, S/N 191.

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