Erratic fuel gauges

[Pete Somers]

Hi All
The big trouble with trouble shooting the capacitance system is that with out a breakout box it is also impossiable to pin down the fault.
Cessna once did a box which covered all the aircraft up to the 421, however this was taken over by a Bendix test box.

Find a test box it will save you hours and hours of taking the system apart to fix the fault!

Pete

[edasmus]

HI GJ,

I was reading your thread on your erratic fuel gage problem in your 73 C337. I also have a 73 with the exact problem you were describing. The gages bounce up and down together mirroring each other exactly. Sometimes they do read zero and sometimes they work fine but what ever they are indicating, they always do it together. They look like wind shield wipers going back and fourth. Did you ever actually find the problem and if so what was it? I have had my signal conditioner repaired by Aero Mach labs in Wichita but I think I need to send it back because I think the problem is in that 9 pin plug on the conditioner. I'm certain we have the same problem. I'm mostly curious if you solved it!!!

Thanks Ed Asmus

[gkey]

GJ,

Same problem here. Been to the shop, more times than I can remember. Replaced each part of that system at least once. Still no hope. Now I ignore the needles and fly by weight/amount of fuel alone. Never less than 3 hrs worth in the tanks for contingency.

So, I am waiting for the AuRACLE CRM 2120 to be released (it is a primary replacement - yahoo!!), and then install it. Good riddens to Cessna fuel gauges.