59-22-01 PIAGGIO: Applies to All Model P.136-L2 Aircraft.
Compliance required by November 30, 1959.
In order to preclude the possibility of condensed water vapor from freezing and obstructing the oil tank breather lines, these lines for both the right and left engines should be rerouted to provide an increased slope in accordance with Piaggio & Co. Change Order No. 36- 52 which covers this same subject.