What was found
PHX - FLT NR 550 - DURING REGULAR MAINTENANCE CHECK, DISCOVERED 3 CRACKS IN THE FUSELAGE SKIN AFT OF THE WING TO BODY FAIRING AT BS 727D, STRINGER 18L. REPAIRED CRACKS PER SRM 53-30-3, FIGURE 6 AND 25. AIRCRAFT RETURNED TO SERVICE. (M)