Service difficulty report · Capacitor · Found FBA2C

Difficulty date
June 17, 1997
Submitted
March 26, 2000
Operation
Air carrier
Make and model
Found FBA2C
Engine
Lyc O540A1C5
Part
Capacitor
Part number
1051676
Condition
Failed
Location
Magneto
Part time
5 hours
Component
Bendix · S6LN21
Stage of operation
IN
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

(CAN) TWO CAPACITORS FAILED AFTER A SIMILAR SHORT OPERATION. WHEN TESTED ON A DIGITAL CAPACITANCE METER BOTH WOULD GIVE INTERMITTENT IRREGULAR READINGS. NYLON PUSHER BLOCK WAS MELTED ON THE BREAKER POINT SIDE INDICATING EXCESSIVE HEAT BUILD UP, BUT THE CONTACT SURFACE LOOKED VISUALLY NORMAL UNDER A 10X GLASS. SUSPECT EITHER DEFECTIVE CAPACITATORS OR THEY MAY HAVE BEEN DAMAGED FROM HIGH VOLTAGE SPIKERS FROM THE STARTER SOLENOID. THERE WAS .7 VOLT LEAKAGE TO THE "P" LEAD DURING SOLENOID ACTUATION WITHOUT THE STARTER CURRENT BEING APPLIED. COMBINATION MAGNETOS/STARTER SWITCH DISASSEMBLED AND CLEANED.

More about the Found FBA-2C