What was found
DURING COMPLIANCE OF AD 87-11-07; PRATT AND WHITNEY ASB 5676, FOUND THE NR 1 ENGINE AFT DRAIN BOSS HAD A CRACK INDICATION. REPLACED THE NR 1 ENGINE IAW ABX J7001 CARD. REPAIRED ENGINE IAW PRATT AND WHITNEY OVERHAUL MANUAL AND ABX GMM, CHAPTER 4.