What was found
IND - FLT 461 - EN ROUTE FROM CLT-ORD, AT FL240, THE CABIN ALTITUDE WARNING HORN ACTIVATED AS CABIN ALTITUDE WAS AT 10,000 FT AND CLIMBING. STANDBY PRESSURIZATION WOULD NOT CONTROL CABIN AND SELECTING MANUAL SHOWED OUTFLOW VALVE FULL CLOSED. CREW SELECTED BOTH PACKS WITH ISOLATION VALVE OPEN AND CABIN STOPPED CLIMBING. FLIGHT DIVERTED TO IND AND LANDED WITHOUT INCIDENT. NO EMERGENCY WAS DECLARED AND NO OXYGEN MASKS WERE DEPLOYED. MAINTENANCE FOUND THE AFT CARGO DOOR RELEASE BUNGEE LANYARD CAUGHT IN THE DOOR SEAL. REPAIRED BUNGEE LANYARD AND CHECKED DOOR AND SEAL FOR DAMAGE. NO DAMAGE FOUND. PERFORMED SINGLE PACK CONFIDENCE CHECK PER MM 21-00-05. CHECKS GOOD. AIRCRAFT OK FOR SERVICE. (M)