60-24-03 PIPER: Amdt. 225 Part 507 Federal Register November 17, 1960. Applies to PA-24 and PA-24 "250" Aircraft Serial Numbers 24-1 to 24-2161 Inclusive.
Compliance required within the next 10 hours of operation or at the next periodic inspection, whichever occurs first, after the effective date of this directive.
To prevent any interruption in fuel flow should the vent tubes become obstructed, the two fuel cell vent tubes which are located under the wings shall be modified in the following manner:
Drill an 0.098-inch diameter hole (#40 drill) in the aft side of each tube three-fourths of an inch from the end.
(Piper Service Bulletin No. 193 covers this subject.)
This directive effective December 19, 1960.