What was found
THE MAGNETO IMPULSE COUPLER LOCKED UP AND BROKE THE GEARS INSIDE THE BACK OF THE ENGINE. THIS SHEARED THE DOWEL PIN IN THE BACK OF THE CRANKSHAFT CAUSING ENGINE STOPPAGE.
- Difficulty date
- March 4, 2026
- Submitted
- March 4, 2026
- Operation
- General aviation
- Aircraft
- N4181W
- Make and model
- Piper PA32300
- Aircraft serial
- 3240263
- Engine
- Lyc IO540K1A5
- Engine time
- 1,406 hours
- System (JASC)
- 7414 · Magneto/Distributor
- Part
- Dowel Pin
- Condition
- Sheared
- Location
- Magneto
- Component
- Impulse Couplin · Slick
- Component part number
- 6351
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- Y, Z
- Precautionary procedure
- B, A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.