Service difficulty report · Carburetor · Amtr HATZVAN

Difficulty date
April 15, 2007
Submitted
May 14, 2007
Operation
General aviation
Aircraft
N899P
Make and model
Amtr HATZVAN
Aircraft serial
313
Aircraft time
140 hours
Engine
Lyc O235C1
Propeller
Snsnch M76AM
Part
Carburetor
Part number
103103
Part serial
3957413
Condition
Contaminated
Location
Engine
Stage of operation
AP
How discovered
O
Nature of condition
Y, J
Precautionary procedure
E

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

What was found

DURING INSPECTION OF THE CARBURETOR, DISCOVERED FLAKES OF WHAT APPEARS TO BE METAL IN THE GASCOLATOR SCREEN. ALSO, OBSERVED SOME SPECS OF RED MATERIAL ABOUT THE SIZE OF PEPPER. WHEN WE PULLED THE CARB APART WE OBSERVED A LINE ON THE BOTTOM OF THE BOWL WHERE SEDIMENT HAD PREVIOUSLY SETTLED IN THE BOWL. HOWEVER, NOTHING SIGNIFICANT WAS NOTED IN THE BOWL DURING OUR INSPECTION. FURTHER INSPECTION REVEALED THAT ONCE THE NEEDLE VALVE WAS SEATED BY LIGHTLY PRESSING THE FLOAT UPWARD, IT WOULD THEN REMAIN SEATED EVEN IF AIR WAS BLOWN IN THE FUEL INLET PORT. HOWEVER, IF THE FLOAT WAS MANIPULATED UP AND DOWN A FEW TIMES, THE NEEDLE VALVE WOULD THEN NOTICEABLY POP FREE. AND ALTHOUGH NO OBVIOUS DEBRIS WAS NOTED UPON DISA