What was found
PILOT REPORTED DURING CRUISE FLIGHT A SUDDEN LOUD BUZZING/GRINDING NOISE THAT DROWNED OUT THE CABIN NOISE. IT FOLLOWED POWER APPLICATION.
- Difficulty date
- May 10, 2020
- Submitted
- May 11, 2020
- Operation
- Air carrier
- Aircraft
- N516MT
- Make and model
- Bell 407
- Aircraft serial
- 53762
- Aircraft time
- 5,687 hours, 19,537 cycles
- Engine
- Allsn 250C47B
- System (JASC)
- 7200 · Engine (Turbine/Turboprop)
- Part
- Engine
- Part number
- 23063392
- Part serial
- CAE848444
- Condition
- Unknown
- Part time
- 2,258 hours, 6,253 cycles
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.