What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) N128UP, A-300-F4622R, being operated as united parcel service flight 591 enroute dia to rfd diverted to oma because the crew heard a humming and then felt a vibration. The crew ascertained that one of the cargo door seals was losing pressure. The airplane landed without incident. Company mechanics found 2 inch holes in the door seal and air escaping when they pressurized the aircraft. Company maintenance at oma changed the forward cargo door seal.
As the FAA filed it
(-23) N128UP, A-300-F4622R, BEING OPERATED AS UNITED PARCEL SERVICE FLIGHT 591 ENROUTE DIA TO RFD DIVERTED TO OMA BECAUSE THE CREW HEARD A HUMMING AND THEN FELT A VIBRATION. THE CREW ASCERTAINED THAT ONE OF THE CARGO DOOR SEALS WAS LOSING PRESSURE. THE AIRPLANE LANDED WITHOUT INCIDENT. COMPANY MECHANICS FOUND 2 INCH HOLES IN THE DOOR SEAL AND AIR ESCAPING WHEN THEY PRESSURIZED THE AIRCRAFT. COMPANY MAINTENANCE AT OMA CHANGED THE FORWARD CARGO DOOR SEAL.