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rparigoris
Joined: 24 Nov 2009
Posts: 796
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 Posted: Fri Jan 17, 2020 9:19 am Post subject: Rotax 914 UMA Differential Pressure Transducer Failure? |
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Hi Group
Curious, has anyone had a 914 UMA Differential Pressure Transducer Failure?
If so at how many hours? Did you have Transducer exposed to internal cowl temperatures or have it situated in a container under cowl with ambient airflow or perhaps located aft of Firewall?
How was failure noticed?
Thx.
Ron P.
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h&jeuropa
Joined: 07 Nov 2006
Posts: 645
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| Posted: Thu Jan 23, 2020 8:49 am Post subject: Re: Rotax 914 UMA Differential Pressure Transducer Failure? |
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Ron,
Never a failure. Installed on the engine side of the firewall.
15 years, 1000 hours service.
Jim & Heather
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erichdtrombley(at)juno.co
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| Posted: Sun Jan 26, 2020 8:57 am Post subject: Rotax 914 UMA Differential Pressure Transducer Failure? |
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Hi Ron,
I have the UMA transducer installed on the of the airbox on my 914 (see picture). No issues in the 10 plus years it’s been installed.
Regards,
Erich
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Remi Guerner
Joined: 14 Dec 2010
Posts: 284
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| Posted: Tue Jan 28, 2020 12:53 am Post subject: Re: Rotax 914 UMA Differential Pressure Transducer Failure? |
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Mine failed twice, first time after 30 hours, indicating zero, replaced under warranty, then after 300hours started to give false readings, replaced with a steam gauge.
It was installed on the firewall, see attached picture. Note the engine is a 912ULS, but the UMA sensor is the same as the one for the 914, except that it is vented to the cowling atmosphere instead of the airbox.
Remi
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