# SDR O2GA2017122283901

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 18, 2017
- Submitted: December 22, 2017
- Operation: Air carrier
- Aircraft: N839UP
- Make and model: Beech B300
- Registry model: [Beech B300](https://openairdocs.org/model/hawker-beechcraft-b300) (OpenAirDocs)
- Aircraft serial: FL984
- Aircraft time: 2,271 hours, 1,927 cycles
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Downlock Switch
- Part number: 1013646289
- Part serial: 1433
- Condition: Defective
- Location: Nlg
- Part time: 2,271 hours, 1,927 cycles
- Stage of operation: AP
- 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/O2GA2017122283901

## Discrepancy

DURING APPROACH, WHEN GEAR HANDLE SELECTED DOWN, NOSE LANDING GEAR UNSAFE LIGHT ILLUMINATED. INITIATED A LOW SPEED APPROACH OVER TOWER WHICH CONFIRMED GEAR WAS DOWN. PERFORMED MANUAL GEAR EXTENSION PER POH. NLG LIGHT ILLUMINATED AFTER A COUPLE OF MINUTES. LANDING WAS UNEVENTFUL. MAINTENANCE TROUBLESHOT THE DISCREPANCY TO A FAULTY NLG DRAG BRACE DOWNLOCK SWITCH. REPLACED SAME, PERFORMED OPS CHECK AND AIRCRAFT WAS RETURNED TO SERVICE.

---
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.