59-08-03 PIPER: Applies to Model PA-23, Serial Numbers 23-1502 To 23-1558 Inclusive, 23-1560 To 23-1562 Inclusive and 23-1565 To 23-1567 Inclusive.
Compliance required by May 1, 1959.
Install an operating limitations placard on the instrument panel stating "This airplane must be operated as a normal category airplane in compliance with the airplane flight manual. Acrobatic maneuvers including spins prohibited."
(Piper Service Bulletin No. 169 covers this subject.)