Service difficulty report · Carburetor · Cessna 150C

Difficulty date
July 14, 1997
Submitted
March 26, 2000
Operation
General aviation
Make and model
Cessna 150C
Engine
Cont O200A
Part
Carburetor
Part number
MA3SPA
Condition
Worn
Location
Carb Heat Box
Part time
7,190 hours
Stage of operation
IN
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 CARBURETOR INSPECTION THE FORWARD SUPPORT BRACKET WAS FOUND LOOSE, FURTHER INSPECTION REVEALED THE SCREWS HOLDING THE BRACKET TO THE CARBURETOR HEAT BOX WERE LOOSE, EVEN THOUGH THE SCREWS WERE INSTALLED WITH LOCKWASHERS AND WERE PROPERLY LOCKWIRED. INSPECTION OF THE SCREWS FOUND THE THREADS WERE WORN AND DID NOT GRIP. THE LOCATION OF THESE SCREWS INSIDE THE CARBURETOR HEAT BOX COULD CREATE A INGESTION PROBLEM, THE ONLY WAY TO PROPERLY INSPECT THESE SCREWS IS TO REMOVE THE AIR FILTER BOX.

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