On Sun, 13 Mar 2005 23:04:15 +1100, you wrote:

> At 22:39 13/03/2005, you wrote:
>>Yes, but any pilot should check the loading placard, which must be current,
>>otherwise the glider is un-airworthy and should be grounded.
>>
>>Roger Browne
> 
> Hi Roger
> 
> ..but if the placard is wrong, how is the next pilot able to tell 
> this?????????????????????????????????????????
> 
> (It depends on the people who make changes to equipment recording and 
> calculating the new weight and CG range, and entering it in the maintenance 
> records - if this is not done "We'll all be rooned".)
> 
> Wombat
> 
> P.S. a general rule is that any change greater than 0.5% of MAUW is a 
> trigger for a re-weigh . 

I think 0.5% is a bit small to demand a full reweigh in all cases.
Changes of that magnitude should be easily calculated if they are
caused by the addition/removal of items such as instruments,
batteries, new fixed cushions etc.
If the change is caused by a repair to the fabric of the aircraft,
then I agree with you 100%
Of course the calculations have to be done by someone with W & B
authorisation, and entered correctly in the logbook. New placards will
be needed as well.
John G.
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