SDR 2000ZZZX49

Service difficulty report · Screw · Cessna 172M

Difficulty date: December 17, 1999
Submitted: March 26, 2000
Operation: General aviation
Aircraft: N20345
Make and model: Cessna 172M
Aircraft serial: 17261208
Engine: Lyc O320E2D
System (JASC): 7322 · Fuel Control/Reciprocating Engines
Part: Screw
Condition: Loose
Location: Carburetor
Component: Facet · MA4SPA105217
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

DURING SCHEDULED INSPECTION, CARBURETOR THROTTLE BODY TO BOWL SCREWS WERE FOUND LOOSE. REMOVED FROM ENGINE, INSPECTION REVEALED NO FURTHER DEFECTS. NEW GASKET AND LOCKING TABS INSTALLED. CAUSE: POSSIBLE GASKET SHRINKAGE OR UNDERTORQUE OF SCREWS. SUSPECT GASKET SHRINKAGE AS LOCK TABS WERE BENT TO LOCK SCREWS.

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