owl hook/fasteners and fixed cowl hook/rivets on shear web. Check for evidence of contact on both sides and outboard of fixed cowl hook. Repair per Grumman Service Bulletin 88-30. • • • 1 EFTA_R1_00015867 EFTA01735091 GIV NOISE AND VIBRATION IN THE CABIN CHAFE INSPECTION revised 6/9/97 by Al Lane 2.