What was found
(CAN) DURING A ROUTINE INSPECTION THE BULKHEAD AT STA. 317.75 WAS FOUND CRACKED IN THE UPPER LT FLANGE AREA. ALSO FOUND PIPER REINFORCEMENT PLATE CRACKED. THIS AREA HAD PREVIOUSLY BEEN ADDRESSED BY S/B 636A & KIT 763-917. INSTALLED SEPT 28/81 AT 3498.7 AIRFRAME HRS. AS WELL AS AD80-22-04 & AD 96-12-12.S/B 636A STATES THAT UPON INSTALLATION OF KIT P/N 763-917 THE RECURRING INSPECTION REQUIREMENTS ARE ELIMINATED. REINFORCEMENT PLATE IS A PART OF THE KIT. TOTAL BULKHEAD HRS: 16,391.8.TOTAL PLATE HRS: 12,893.1