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AndrewC
Joined: 28 Jan 2006
Posts: 8
Location: Scotland, UK
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 Posted: Tue Feb 14, 2006 1:34 pm Post subject: 601 XL - CZA quickbuild kit - flap switch |
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G-DROO is a quickbuild 601 XL from the CZAW factory from around July 2004. Last weekend the plane took its first test flight and for the first time the flaps decided to fail. The test pilot made a routine flapless landing but the result is that after investigation it appears that the circuit breaker tripped and would not reset. An examination of the flap motor and actuator rod assembly showed that the CZAW kit has a metal flap on the actuator rod - presumably for a RAC flap indicator servo mechanism to attach - and that the metal flap had been impacting on the lower limit flap microswitch body when the flap was fully retracted. Over time this impacting appears basically to have damaged the microswitch body, resulting in a short circuit and the ensuing circuit breaker trip (the switch fell apart when removed from the plane). A new switch has been obtained and I intend to cut off the metal flap (since I don't have a flap indicator) so that fouling cannot occur. It may be that a readjustment of the microswitches on their mounting rod would remedy it too, but I'm happy to lose the weight of that metal flap...
All I'd suggest is that if you have a CZAW quick build XL from around then you might want to check the state of the flap lower limit microswitch to see whether, at full up flap, there is any impacting on the microswitch body. It's probably just mine that this has happened with, but thought it better to share it.
Andrew
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David X
Joined: 10 Jan 2006
Posts: 154
Location: Princeton, NJ, USA
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| Posted: Tue Feb 14, 2006 5:21 pm Post subject: Re: 601 XL - CZA quickbuild kit - flap switch |
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Andrew, thank you very much for the details. It's something I'll look for on my own aircraft.
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Zodiac 601 XL - CZAW Built - Rotax 912S
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