What was found
AIRCRAFT POWER WAS APPLIED, CREW OBSERVED ENGINE CHIP DETECTOR LIGHT CAME ON, WENT OFF AND THEN STAYED ON. REMOVED BOTH CHIP DETECTORS AND FOUND SIGNIFICANT METAL ON BOTH PLUGS. AIRCRAFT WAS GROUNDED.
- Difficulty date
- January 2, 2018
- Submitted
- March 13, 2018
- Operation
- General aviation
- Aircraft
- N873ST
- Make and model
- Bell 407
- Aircraft serial
- 54500
- Engine
- Allsn 250C47B
- System (JASC)
- 7200 · Engine (Turbine/Turboprop)
- Part
- Engine
- Condition
- Making Metal
- Stage of operation
- TX
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.