What was found
DURING HEAVY CHECK, RT BEAM Y=10.748, FRAME 86-89 IS CORRODED. MAINTENANCE R & R RT BEAM Y=10.748, FRAME 86-89 IAW SRM 51-40-02, 51-23-06, 51-43-03 REFER TO IPM 12 FOR WORK DETAILS. PN 170-85669-002 BEAM. AIRCRAFT REMAINS UNTIL HEAVY CHECK IS COMPLETED.