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C-12 compass


jonmazz
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Good afternoon,

the problem is on an 1966 HC-130P acft. We are unable to get the #2 compass within 6 degrees of the #1 compass and the INU. We have replaced every component in the system at least twice, have re-wired the power and directional wires from the flight deck to the terminal board inside the #2 RH leading edge section, and the power wires from the terminal board to the azimuth. Duruing our compass swings, we are very close to not needing adjustment on the east to west alignment on the compensator. However, the north to south adjustment is maxed out. Have been battling this issue for a few months so any help would be great!

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Do you have a flux valve simulator? If so, what does it do when connected into the system? Were the new flux valves from a depot repair facility, or did they have serviceable tags on them from a mod team. Years ago, there were many flux valves turned in by mod teams that were not serviceable. 

Any chance a ferrous screw or nut is installed around the flux valve, like on the connector backshell? Was there maintenance performed around the wing tip area before this started?

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  • 5 weeks later...

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