SDR 96ZZZX5970

Service difficulty report · Wire · Beech B100

Difficulty date
November 19, 1996
Submitted
March 26, 2000
Operation
General aviation
Aircraft
N87NW
Make and model
Beech B100
Aircraft serial
BE42
Part
Wire
Part number
M22759749
Condition
Cracked
Location
Start/Gen
Part time
5,675 hours
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

THE STARTER/GENERATOR 4 GAUGE WIRES THAT RUN FROM THE FIREWALL POWER CONNECTOR TO THE STARTER/GENERATOR WERE FOUND WITH CRACKED INSULATION. THE CRACKS ARE 2 INCHES TO 4 INCHES IN LENGTH, EXPOSING THE CENTER CONDUCTOR. ON THE LT AND RT ENGINE, THE DEFECTIVE WIRE IS LABELED P10C4. SOME OF THE WIRING ON THIS AND OTHER B100'S IS M22759/8 OR /16. THESE 2 SHOW NO SIGNS OF SPLITTING OR CRACKING. ONLY THE TYPE M22759/7 HAS BEEN FOUND WITH CRACKS. TEMP RATING ON THESE WIRE TYPES ARE PLUS 150 DEGRESS CELSIUS FOR THE /16, PLUS 200 DEGREES CELSIUS FOR THE /7 AND PLUS 260 DEGREES CELSIUS FOR THE /8. THIS IS THE FOURTH B100 FOUND WITH THIS PROBLEM.

More about the Beech B100