Service difficulty report · Cooling Fan · Cirrus SR20

Difficulty date
November 12, 2015
Submitted
November 19, 2015
Operation
General aviation
Aircraft
N590PU
Make and model
Cirrus SR20
Aircraft serial
2051
Aircraft time
2,431 hours
Engine
Cont IO360ES
Engine time
344 hours
Part
Cooling Fan
Part number
ES4137
Condition
Loose
Location
Alternator
Part time
344 hours
Component
Alternator · Cont · ES4029
Component part number
653344
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

DURING A CIRRUS PROGRESSIVE INSPECTION PROGRAM PHASE 2 INSPECTION DISCOVERED ALTERNATOR NR 2 COOLING FAN LOOSE ON ALTERNATOR SHAFT. FAN, PN: ES4137 IS PART OF ALTERNATOR, PN: 653344. THE KEY WAY OF THE FAN HUB WEARS PREMATURELY ALLOWING ROTATIONAL MOVEMENT OF THE FAN ON THE SHAFT. WE HAVE SEEN THIS CONDITION ON SEVERAL OF THESE ALTERNATORS RECENTLY.

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