Instrument Accuracy

This question is looking for legal (ie FAR) answers versus good
judgement.

Can anyone point me at the accuracy requirements for typical glider
instruments such as airspeed, altimeter, vario, and magnetic compass.
How much error is permitted before the instrument must be replaced or
repaired to keep the glider in an airworthy condition for VFR flight
in the US.

On Aug 17, 10:07 am, RN wrote:
This question is looking for legal (ie FAR) answers versus good
judgement.

Can anyone point me at the accuracy requirements for typical glider
instruments such as airspeed, altimeter, vario, and magnetic compass.
How much error is permitted before the instrument must be replaced or
repaired to keep the glider in an airworthy condition for VFR flight
in the US.

there are no inspection requirements for altimeter or airspeed for VFR
flight. IFR would require the static sytem be tested. compass has to
be adjusted to be within 5 degrees (i think) on any heading, and of
course the compass card has to be filled out showing the deviation at
various headings.

On Aug 17, 9:04 am, wrote:


there are no inspection requirements for altimeter or airspeed for VFR
flight. IFR would require the static system be tested.


You're being too reality-based.
Try telling that to the "I'm just covering my a__ and getting my
retirement" FAA inspector who constructed my last EXP operating
limitations. Had to get a pitot/static test done on a glider, then
have IFR forbidden in the op limits.
You probably need to be on LSD (or government payroll) to figure out
the rules any more.
Jim

On Aug 17, 12:38 pm, JS wrote:
On Aug 17, 9:04 am, wrote:



there are no inspection requirements for altimeter or airspeed for VFR
flight. IFR would require the static system be tested.

You're being too reality-based.
Try telling that to the "I'm just covering my a__ and getting my
retirement" FAA inspector who constructed my last EXP operating
limitations. Had to get a pitot/static test done on a glider, then
have IFR forbidden in the op limits.
You probably need to be on LSD (or government payroll) to figure out
the rules any more.
Jim

that would be like the fsdo maintenance inspector who was kind enough
to file an ntsb report for me after i had a non reportable incident?
yes it seems that sometimes the federalis dont know they're own
rules. sad.

the static check is a very common misconception. many mechanics
believe they are required for all aircraft. some market and IFR and a
VFR static check. ive always wondered what standards the VFR check is
held to.