Archive for April 4th, 2010

2010 4 Apr

Also last week, Hanna helped to calibrate the pitot static system… First we had to chase a small leak which turned out to be the a NPT thread fitting that wasn’t exactly tight (not the first problem with thread fittings after all ;-) . After sealing this, everything was well within specs (less than 100ft/min altitude loss and less than 10kts/min speed loss). In the end, the speed drop was about 2 knots and the altitude loss 20ft per minute.

We used a calibration kit from the local maintenance provider to check accuracy. Amazingly, the cheap UMA backup instruments proved to be quite accurate.