What was found
NR 1 ENGINE SHUT DOWN DUE TO BACKFIRING AND RUNNING ROUGH. FOUND NR 12 CYLINDER FRONT AND REAR SPARK PLUGS WITH CRACKED CERAMICS. REPLACED PLUGS, OP CHECKED GOOD.
- Difficulty date
- November 9, 2004
- Submitted
- November 10, 2004
- Operation
- Air carrier
- Aircraft
- N6174C
- Make and model
- Doug DC6A
- Aircraft serial
- 44075
- Aircraft time
- 51,014 hours
- Engine
- Pwa R2800CB3
- Engine time
- 658 hours
- System (JASC)
- 7421 · Spark Plug/Igniter
- Part
- Spark Plug
- Part number
- URHB32E
- Condition
- Cracked
- Location
- Nr 12 Cylinder
- Part time
- 18 hours
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- R, J
- Precautionary procedure
- E, A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.