# SDR 2012F00162

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 10, 2012
- Submitted: August 14, 2012
- Operation: General aviation
- Aircraft: [N450CR](https://openairdocs.org/aircraft/N450CR), registered now
- Make and model: Beech B300
- Registry model: [Beech B300](https://openairdocs.org/model/hawker-beechcraft-b300) (OpenAirDocs)
- Aircraft serial: FL340
- Aircraft time: 3,550 hours, 3,395 cycles
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Uplock Switch
- Condition: Shorted
- Location: Mlg
- Stage of operation: LD
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2012F00162

## Discrepancy

ON LOWERING LANDING GEAR.  CIRCUIT BREAKER TRIPPED. LANDING GEAR HAD TO BE MANUALLY LOWERED FOR LANDING.  ACFT LANDED WITHOUT INCIDENT.  FOUND SAFETY WIRE PIGTAIL, WHICH SAFETIED THE LT UP-LATCH SWITCH, HAD CHAFED INTO AN ADJACENT WIRE BUNDLE, SHORTING OUT THE GEAR CONTROL POWER WIRE.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.