Text in force at CAR3-14: from CAR3-0, effective 1 Nov 1949. OCR text
(a) The strength of ribs in other than stressed-skin wings shall be proved by test to at least 125 percent of the ultimate loads for the most severe loading conditions, unless a rational load analysis and test procedure is employed and the tests cover the variability of the particular type of construction.
(b) The effects of ailerons and high lift devices shall be properly accounted for. Rib tests shall simulate conditions in the airplane with respect to torsional rigidity of spars, fixity conditions, lateral support, and attachment to spars.