What was found
WHILE PERFORMING AN AIRWORTHINESS CHECK, THE MECHANIC FOUND A 50 MILLIMETER HAIRLINE CRACK IN THE SKIN OF THE LT AFT FUSELAGE, STATION 5460, JUST ABOVE THE BAGGAGE COMPARTMENT DOOR. FURTHER INVESTIGATION REVEALED THAT THE UPPER LT LONGERON OF THE AFT FUSELAGE IS CRACKED AT STATION 5460, WL 1285 & LBL 450, ALL STATIONS REFLECTED IN MILLIMETERS.