# SDR 20000405SH018

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 15, 2000
- Submitted: April 5, 2000
- Operation: Air carrier
- Aircraft: [N6210Y](https://openairdocs.org/aircraft/N6210Y), registered now
- Make and model: Cessna T210N
- Registry model: [Cessna T210N](https://openairdocs.org/model/cessna-t210n) (OpenAirDocs)
- Aircraft serial: 21064297
- Engine: Cont IO550*
- System (JASC): [2460 · DC Power Distribution System](https://openairdocs.org/jasc/2460)
- Part: Switch
- Part number: S24752
- Condition: Corroded
- Location: Firewall
- Part time: 5,658 hours
- Component: Contactor
- Stage of operation: NR
- How discovered: O
- Nature of condition: H, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/20000405SH018

## Discrepancy

WHILE IN-FLIGHT, GEAR HANDLE WAS LOWERED.  HYDRAULIC PUMP ACTUATED, THEN STOPPED.  TOTAL ELECTRICAL FAILURE WAS OBSERVED.  GEAR WAS EXTENDED MANUALLY.  LANDING ACCOMPLISHED.  EXAMINATION OF THE MASTER SWITCH SOLENOID REVEALED AN OPEN ELECTROMAGNET COIL WIRE.  THE CAUSE WAS UNDETERMINED.  MELTED, BROKEN, CORRODED.  FAILURE OF THIS ONE PART RESULTED IN THE COMPLETE ISOLATION OF THE BATTERY AND THE ALTERNATOR FROM THE ELECTRICAL SYSTEM.  (X)

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