Service difficulty report · Coil · Robsin R44RAVENII

Difficulty date
December 3, 2010
Submitted
March 15, 2011
Operation
Air carrier
Make and model
Robsin R44RAVENII
Aircraft time
129 hours
Engine
Lyc IO540AE1A5
Part
Coil
Part number
103571651
Condition
Damaged
Location
Magneto
Part time
178 hours
Component
Magneto · Bendix
Component part number
106006169
Stage of operation
CR
How discovered
O
Nature of condition
Y, J
Precautionary procedure
A

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

What was found

(CAN) MAGNETO INSPECTED AFTER GOVERNOR SURGE, HI-TENSION OUTPUT TANG ON COIL ASSEMBLY FOUND BENT UPWARDS, APPROX 30 DEGREES. TANG WORN THROUGH AND ELECTRICALLY BURNT. CARBON BRUSH ASSEMBLY DESTROYED. INSTALLATION INSTRUCTIONS REQUIRE TANG TO BE FLUSH WITH MAGNETO MATING SURFACE. ALSO NOTED AT TIME OF INSPECTION, MAIN ROLLER BEARINGS HAD NO GREASE LUBRICATION IN/ON THEM. MAGNETO HAD NO HISTORY OF PRIOR DISASSEMBLY. CONFIRMED BY CUSTOMER, WITNESS PAINT APPLIED AT FACTORY HAD NOT BEEN REMOVED.