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"Jon A." wrote in message ... On Fri, 31 Dec 2004 07:36:16 -0400, "Juan Jimenez" wrote: "M" wrote in message oups.com... I'm considering adding a second (backup) electric AI. The primary AI is vacuum driven so is the DG. Two questions: 1. Does adding a backup electric AI require an 337? Not necessarily. A repair station may be able to perform the work based on a work order approval, since it's not really a major alteration. Ask your local avionics shop. Any work that alters (that includes drilling, cutting, riveting), needs a 337. There is one exception, that I know of. Check AC 43.9-1E. |
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