RVSM alt check on ground
Thread Starter
Joined: Dec 2004
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From: italy
RVSM alt check on ground
When and how do you perform the RVSM alt check on ground (75ft max tollerance) between PFD alt and ground elevation?
Usually plates doesn't show apron elevation, so remaing options may be the ARP (not feasable to take the plane on it to perform the check) or at runway threshold.
Are you allowed not to enter RVSM if an alt threshold check would be outside limits? Or your company will ask you money for extra burnt fuel, since your SOP don't forsee to perform this check at threshold?
Any prectical suggestion is well accepted!
Usually plates doesn't show apron elevation, so remaing options may be the ARP (not feasable to take the plane on it to perform the check) or at runway threshold.
Are you allowed not to enter RVSM if an alt threshold check would be outside limits? Or your company will ask you money for extra burnt fuel, since your SOP don't forsee to perform this check at threshold?
Any prectical suggestion is well accepted!
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Joined: Mar 2009
Posts: 480
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From: USA
Has nothing to do with apron level. Given current baro pressure reported on ADIS is used to determine if an altimiter is out of tolerance. I guess you may have a bit of a point at high altitude airports but usually a split is the main indicator there may be a problem.
Maintanence would usually have to do a scale check, sometimes this is done at just a few altitudes based off of 29.92, for certification I have had in the past to perform a check roughly every 2-3k feet up to 41k. The deviation allowed is much greater at higher altitudes and a split at lower altitudes is often just fine at higher ones.
Maintanence would usually have to do a scale check, sometimes this is done at just a few altitudes based off of 29.92, for certification I have had in the past to perform a check roughly every 2-3k feet up to 41k. The deviation allowed is much greater at higher altitudes and a split at lower altitudes is often just fine at higher ones.
