What was found
CLB THRU 10K + ACCEL. THRU 280 VIBRATION START SLWD TO 260 IT DI MINSHED *UPDATE* PILOT HEARS LOUD NOISE DURING ACCELERATION SAYS DURING CLIMB A LOUD NOISE IN COCKPIT GETS LOUDER DURING ACCELERATION. DURING SLOW DOWN NOISE DIES DOWN , CAN FEEL VIBRATION IN WINDOWS , FLOORS AND SIDE PANNEL , REPEATED BANGING. INSPECTION OF EXTERNAL DOOR HANDLE , RAN L & R PACKS NO OPERATION, LEFT AND RIGHT PACK BAY DUCTS AND CLAMPS. FOUND NO ALSO STATED THE VIBE NEVER COMPLETELY WENT AWAY BUT WOULD BE PRO VIBRATION , OUTFLOW VALVES , ENTRY DOOR SEALS NO FAULTS FOUND DEFECTS OR LEAKS ON ANY COMPONENTS. NOUNCED DURING POWER UP CONDITIONS. SOUND WAS SIMILAR TO A STEAD PER AMM 05-51-38 , PERFORMED FURTHER INSPECTION OF NLG & MLG Y JACK HAMMER THAT WOULD ALSO DIMINISH AT LEVEL OFF. DOORS & BAYS NO FAULTS FOUND . ACCOMPLISHED WALKAROUND NOTHING UNUSAL NOTED. INSPECTED RADOME FURTHER INSPECTED COCKPIT L&R WINDOW FOR LOOSE SEALS NO DEFECT PERFORMED AIRFRAME VIBRATION INSPECTION PER AMM 05-51-38. PRESSURIZED AIRCRAFT AND PERFORMED LEAK CHECK OF L1 AND R1 DOOR SPOKE WITH FO, HE STATED THAT THE VIBRATION AND TAPPINHG NOISE S SEAL LOOKS NORMAL. REF AMM 05-51-38 PERFORMED INSPECTION OF SEAL FOUND , RAN GROUND TEST FOR PRIMARY FLIGHT CONTROL SYSTEM TEST INSPECTED FORWARD AND MAIN E&E COMPARTMENT AND DUCTS, RAM AIR SILLS REF AMM 05-51-24. LEAK CHECK GOOD. NO DEFECTS FOUND TARTED AS THEY PASSED THRU 10K FEET DURING ACCELLERATION. FA REP AT THE STA 786 WING SPAR AND FUSELAGE LONGERON,