78-10-03 PIPER: Amendment 39-3212. Applies to all J-3, J-4, J-5, PA-11, PA-12, PA-14, PA-16, PA-18, PA-20 and PA-22 type aircraft. \n\n\tCompliance required within the next 10 hours in service after effective date of this AD unless already accomplished. \n\n\tIn order to prevent inadequate fuel venting, accomplish the following: \n\n\t(a)\tModify fuel caps and inspect fuel tank inlet rubber seal in accordance with Piper Service Bulletin No. 522 dated September 28, 1976, (former AD 77-09-09 Sketch 1) or approved equivalent. AD 78-10-03 \n\n\n\n\n\n\n\n\n\n\n\n\n\n\t(b)\tDrill 2 additional vent holes .098 inch diameter through locking cam of fuel cap (Sketch 2) in accordance with instructions of Piper Service Bulletin No. 573 dated February 8, 1978, or approved equivalent. \n\n\t(c)\tUpon compliance with (b), vibro-etch Part No. 60707-04 as shown in Sketch 2. \n\n\t(d)\tEquivalent alterations must be approved by Chief, Engineering and Manufacturing Branch, FAA Eastern Region. \n\n\t(Piper Service Bulletins Nos. 522 and 573 pertain to this subject.) \n\n\tAmendment 39-3212 cancels AD 77-09-09. \n\n\tThis amendment is effective May 23, 1978.