SDR 98ZZZX188

Service difficulty report · Harness · Cessna 402B

Difficulty date: December 26, 1997
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N29MM
Make and model: Cessna 402B
Aircraft serial: 402B0863
Engine: Cont TSIO520E
System (JASC): 7420 · Ignition Harness (Distribution)
Part: Harness
Part number: CH11730
Condition: Shorted
Location: Nr 5 Cyl Lead
Stage of operation: CR
Nature of condition: E, R
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING THE COURSE OF NORMAL OPERATION, PILOT NOTICED LEFT ENGINE RUNNING ROUGH. AFTER LANDING, MAINTENANCE DETERMINED THE LEFT MAGNETO HARNESS, NR 5 CYLINDER, BOTTOM LEAD, HAD SHORTED INTERNALLY CAUSING THE SPARK PLUG TO NOT FUNCTION PROPERLY.

More about the Cessna 402B