Service difficulty report · Resistor · Cessna 172R

Difficulty date
September 22, 2008
Submitted
November 3, 2008
Operation
General aviation
Make and model
Cessna 172R
Aircraft time
1,820 hours
Engine
Lyc IO360L2A
Propeller
Mcauly 1A170E
Part
Resistor
Part number
S38521
Condition
Worn
Location
Fuel Indicator
Stage of operation
IN
How discovered
9
Nature of condition
N
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 GROUND RUN, NOTICED THAT THE LOW FUEL WARNING LIGHT FOR THE LT SIDE WOULD FLICK ON. IF YOU WERE QUICK ENOUGH TO CATCH IT THE LT FUEL QUANTITY NEEDLE WOULD TWITCH AT THE SAME TIME. WITH THE SENDER REMOVED THE RESISTANCE IN THE SENDER WAS CHECKED WITH A DIGITAL MULTI METER. NORMAL OPERATION FROM THE EMPTY TO FULL IS 2 OHMS TO 90 OHMS. THE SENDER WAS FINE AT THE EMPTY POSITION AT 2 ISH OHMS UP TO 63 OHMS. PAST 63 UP TO FULL THE RESISTANCE COULD SPIKE UPWARDS AROUND 350 OHNS WHEN THE FLOAT ARM WAS WIGGLED. UNIT WAS REPLACED AND NO FURTHER ISSUES WERE NOTED.

More about the Cessna 172R