Service difficulty report · Electrode · Robsin R44

Difficulty date
November 1, 2011
Submitted
September 14, 2015
Operation
General aviation
Make and model
Robsin R44
Aircraft time
5,261 hours
Engine
Lyc O540F1B5
Part
Electrode
Part number
ES10357586
Condition
Loose
Location
Magneto
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

(CAN) MAGNETO WAS RECEIVED FOR 500 HR INSPECTION. WHEN DISASSEMBLED THE BRASS ELECTRODE ON THE DISTRIBUTOR GEAR WAS FOUND LOOSE. TOTAL HRS ON THIS ELECTRO SYSTEMS MFG PART ARE UNKOWN BUT IT APPEARS TO HAVE A `BATCH CODE` OF 45 ENGRAVED INTO THE NYLON GEAR. THE ELECTRODE BECAME LOOSE AND CONTACTED THE ELECTRODES OF THE DISTRIBUTOR BLOCK AND WORE THEM AS WELL. THE GEAR AND BLOCK WERE REPLACED AT THE 500 HOUR INSP. AND THE MAGNETO WAS RETURNED TO SERVICE.