Service difficulty report · Control Panel · Beech C90A

Difficulty date
July 13, 2012
Submitted
September 14, 2015
Operation
General aviation
Make and model
Beech C90A
Engine
Pwa PT6A21
Propeller
Hartzl HCB3TN3
Part
Control Panel
Condition
Malfunctioned
Location
Fuel Control
Stage of operation
IN
How discovered
9
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

(CAN) DURING OTHER MAINTENANCE THAT REQUIRED THE FUEL CONTROL PANEL TO BE DROPPED, EXCESSIVE CORROSION HAD ACCUMULATED ON THE CATHODE, NEGATIVE END, OF FUEL CONTROL PANEL DIODES. CORROSION WAS REMOVED AND FUEL CONTROL PANEL RE-INSTALLED. THE ONGOING PROBLEM WITH THIS OCCURS AFTER WATER COLLECTS BETWEEN THE STORM WINDOW SEAL AND WINDOW FRAME AND ONCE THE STORM WINDOW IS OPENED THE WATER DRIBBLES ONTO THE TOP OF THE FUEL CONTROL PANEL SEEPING INTO THE INNER WORKS.

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