AMC 22.21 Proof of compliance

CAA ORS9 Decision No. 1

(1) Instrumentation for flight test

(a) For test purposes the sailplane should be equipped with suitable instruments for conducting the required measurements and observations in a simple manner. If reliable results cannot be obtained otherwise, the Agency may request the installation of special test equipment.

(b) At an early stage in the programme the accuracy of the instruments and their correction curves should be determined, and particular attention should be paid to the position error of the air-speed indication system; the influence of the configuration of the sailplane should also be accounted for.

(2) Prior to flight test, the following ground tests should be conducted:

(a) Measurement of:

(i) control circuit stiffness;

(ii) friction of controls;

(iii) control cable tension of closed control circuits; and

(iv) maximum deflection of control surfaces and wing-flaps.

(3) Functioning tests.

Before starting the flight tests all ground functioning tests should be carried out; especially the functioning of the towing hook should be tested in operation for all cable angles and forces which may occur.