FAA Advisory Circular 43.13-1B
Acceptable Methods, Techniques, and Practices
Aircraft Inspection and Repair
AC 43.13-1B | 8. Engines, Fuel, Exhaust, and Propellers | 1. Engines | 8-18. Ignition Harnesses Inspection
AC 43.13-1B CHG 1
9/27/01
FIGURE 8-6d. Typical worn out spark plug.
8-17. SPARK PLUG PRE-RECONDI-
TIONING INSPECTION. All spark plugs
should be inspected visually before recondi-
tioning to eliminate any plug with obvious de-
fects. A partial checklist of common defects
includes:
a. Chipped or cracked ceramic either at
the nose core or in the connector well.
b. Damaged or badly worn electrodes.
c. Badly nicked, damaged, or corroded
threads on shell or shielding barrel.
d. Dented, bent, or cracked shielding
barrel.
e. Connector seat at the top of the
shielding barrel badly nicked or corroded.
FIGURE 8-6e. Typical spark plug with bridged electrodes.
FIGURE 8-7. Spark plug well flashover.
8-18. IGNITION HARNESSES INSPEC-
TION. Aircraft-quality ignition harness is
usually made of either medium or high-
temperature wire. The type used will depend
upon the manufacturing specification for the
particular engine. In addition to the applicable
manufacturer’s maintenance and repair proce-
dures, the following is a quick-reference
Page 8-14
Par 8-19