Service difficulty report · Starter · Mooney M20F

Difficulty date
March 20, 2008
Submitted
March 20, 2008
Operation
General aviation
Aircraft
N9615M
Make and model
Mooney M20F
Aircraft serial
670192
Aircraft time
3,152 hours
Engine
Lyc IO360A1A
Engine time
811 hours
Propeller
Hartzl HCC2YK1
Part
Starter
Part number
14912LS
Part serial
F2L990222
Condition
Failed
Location
Engine
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

THIS STARTER WAS PURCHASED NEW FROM A LOCAL VENDOR. THE STARTER FAILED TO OPERATE AFTER LESS THAN A YEAR AND LESS THAN 100 HOURS OF SERVICE. THE OWNER\OPERATOR WANTED TO HAVE THE OLDER, HEAVIER STARTER INSTALLED HOWEVER NONE WERE AVAILABLE, AFTER CONTACTING SEVERAL PARTS VENDORS. THE OPERATOR OPTED TO HAVE THE STARTER REPAIRED BY THE MFG. THE REPAIRED STARTER WAS INSTALLED BUT FAILED AGAIN SEVEN MONTHS AND 62.3 OPERATING HOURS LATER. A SERVICABLE STARTER WAS LOCATED AND INSTALLED IAW ENGINE SERVICE INSTRUCTION 1154L DATED JANARY 27, 2006. OUR SHOP RECOMMENDED THIS CHANGE DUE TO A TREND WE ARE SEEING IN THE LIGHT WEIGHT STARTERS. WE HAVE SEEN AT LEAST 6 FAILURES OR THE STARTER DRIVE GEAR EITHER FAILING TO ENGAGE THE STARTER RING GEAR, OR WORSE, FAILURE TO RETRACT AFTER ENGINE START. THE RETRACT FAILURE ON SEVERAL OCCASIONS HAS DESTROYED BOTH THE STARTER AND THE RING GEAR. THIS FAILURE IS COSTING IN EXCESS OF $1500.00 TO REPAIR. STARTER DRIVE FAILURE IN THE OLDER PRESTOLITE STARTERS USUALLY REQUIRE ONLY A NEW STARTER DRIVE AND NO DAMAGE TO THE EXPENSIVE RING GEAR.

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