What was found
(AU) DURING A ROUTINE INSPECTION THE BULKHEAD AT STA 317.75 WAS FOUND CRACKED IN THE UPPER LEFT FLANGE AREA. ALSO FOUND PIPER REINFORCEMENT PLATE (P/N 40682-10) CRACKED. THIS AREA HAD PREVIOUSLY BEEN ADDRESSED BY S/B 636A AND KIT 763-917. INSTALLED SEPT 28/81 AT 3498.7 AIRFRAME HRS. AS WELL AS AD 80-22-04 AND 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. REPAIR WAS CARRIED OUT USING PIPER KIT 764-028. TOTAL BULKHEAD HRS: 16,391.8. TOTAL PLATE HRS: 12,893.1.