SDR CA990318016

Service difficulty report · Liner · Bell 205A1

Difficulty date: March 9, 1999
Submitted: March 26, 2000
Operation: General aviation
Make and model: Bell 205A1
Engine: Lyc T5313B
System (JASC): 7921 · Engine Oil Cooler
Part: Liner
Part number: H33C32
Condition: Loose
Location: Blower
Component: 204062540001
Stage of operation: IN
Nature of condition: E
Precautionary procedure: O

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

What was found

(CAN) AFTER REPLACING THE OIL COOLER BLOWER BEARING, THE BLOWER ASSEMBLY CAUSED HIGH FREQUENCY VIBRATION WHEN GROUND RUN. TROUBLESHOOTING REVEALED BEARING LINER, WHICH IS PRESSURE FITTED INTO THE BLOWER HOUSING, WAS LOOSE AND TURNING. THIS CAUSED MISALIGNMENT OF THE BLOWER SHAFT.

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