What was found
(CAN) DURING CRUISE FLIGHT THE CREW FELT A (POP) ON THE AIRCRAFT WITH NO OTHER INDICATIONS. NO WARNING LIGHTS, NO CONTROL OR HANDLING PROBLEMS. AFTER LANDING, THE ENGINEER CARRIED OUT HIS ROUTINE (BEFORE FLIGHT) INSPECTION. LOOKING AT THE TAILBOOM TO FUSELAGE ATTACH FITTINGS, HE FOUND THE FITTING P/N 212-030-161-001 BROKEN IN HALF. DETAILED INSPECTION AFTER REMOVING THE TAILBOOM FOUND THE UPPER LT CAP ANGLE P/N 212-030-191-001 UNDER THE UPPER ATTACHMENT FITTING CRACKED.