What was found
NR 4 ENGINE, NR 2 CYLINDER SHOWS A DOUBLE SHORTED SECONDARY, ENGINE BACKFIRING WHEN LEANED. REPLACED NR 13 CYLINDER FRONT AND REAR SPARK PLUGS ONCE ENGINE ANYLIZER TIMING CORRECTED.
- Difficulty date
- September 1, 2002
- Submitted
- October 17, 2002
- Operation
- Air carrier
- Aircraft
- N2907F
- Make and model
- Doug DC6
- Aircraft serial
- 533265
- Aircraft time
- 33,867 hours
- Engine
- Pwa R2800CB3
- Engine time
- 2,460 hours
- System (JASC)
- 7421 · Spark Plug/Igniter
- Part
- Spark Plug
- Part number
- URHB32E
- Condition
- Cracked
- Location
- Nr 13 Cylinder
- Component
- Cylinder · Pwa
- Component part number
- 356994
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- R, J
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.