# SDR 2026FA0000002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 4, 2026
- Submitted: January 6, 2026
- Operation: General aviation
- Aircraft: [N540SF](https://openairdocs.org/aircraft/N540SF), registered now
- Make and model: Bolkms BK117D3
- Aircraft serial: 21230
- Aircraft time: 1,223 hours, 3,096 cycles
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Gearbox
- Part number: D632K1005051
- Part serial: D30221
- Condition: Warning Light
- Part time: 1,223 hours
- Stage of operation: AA
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000002

## Discrepancy

DURING FLIGHT MGB CHIP LIGHT ILLUMINATED.  PILOT ATTEMPTED TWO ATTEMPTS AT BURNING THE CHIP.  LIGHT REMAINED ON SO PILOT ELECTED TO MAKE AN UNSCHEDULED LANDING AT A NEARBY AIRPORT.

---
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.