Altimeter discrepancy

#1 July 25th 05, 06:58 PM

Gene Whitt wrote:

The altimeters were certified some 300 miles away only three months ago.

Last May I had my altimeter and encoder certified as part of the two-year
requirement. During a flight soon after, I was told by ATC that our
transponder-sent altitude was off about 400 feet when compared to the
altimeter.

After pointing this out to the shop who certified the aircraft, they
discovered that their altimeter that they use to certify aircraft had a 400
foot error in it. Nice...

--
Peter

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#2 July 25th 05, 08:37 PM

Peter R. wrote: After pointing this out to
the shop who certified the aircraft, they discovered that their
altimeter that they use to certify aircraft had a 400 foot error

I assume test equipment like this needs to be calibrated against some
NBS-traceable standard on some periodic basis?

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