What was found
DURING OP 16 MAINT CHECK, FOUND RT NOSE SECTION INTERNAL STRUCTURE, AS VIEWED INSIDE WINDSHIELD WIPER MOTOR ACCESS, HAD MFG PN 9911505-7 FRAME CRACKED AT X=-10, 1 1/2 INCHES LONG IN RADIUS AND 1 1/2 IN LONG BETWEEN 3 RIVETS AT STA 83.5. TWO EACH PLACES. REMOVED AND REPLACED FRAME PER MO 72N37.