# SDR 2022FA0000680

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 6, 2022
- Submitted: November 10, 2022
- Operation: General aviation
- Aircraft: [N248DA](https://openairdocs.org/aircraft/N248DA), registered now
- Make and model: Piper PA46-500TP
- Registry model: [Piper PA46-500TP](https://openairdocs.org/model/piper-pa46-500tp) (OpenAirDocs)
- Aircraft serial: 4697156
- Aircraft time: 2,086 hours
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Squat Switch
- Part number: 87545007
- Part serial: NSN
- Condition: Intermittent
- Location: Mlg
- Part time: 2,086 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2022FA0000680

## Discrepancy

SQUAT SWITCH INTERNAL CONTACTS BTWN PIN 7 AND 9 DEVELOPED A HIGHER LEVEL OF RESISTANCE THAN THE OTHER INTERNAL PINS, CAUSING THE PRESSURIZATION SYSTEM TO SENSE A WEIGHT ON WHEELS SCENARIO, DEPRESSURIZING THE CABIN IN LEVEL FLIGHT. THE PILOT DROPPED FROM FLT LVL 250 DOWN TO 10,000 FT. ATC DECLARED AN EMERGENCY.

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