B737-800
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Illness / Injury
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport
Aircraft
During climbout...passing 12;500' the right pack light illuminated. I continued to climb to approximately 14;000' and then immediately descended back to 10;000' MSL and initiated the QRH. As the QRH steps were accomplished and the outflow valve was opened; significant pressure bumps occurred. The cabin pressure never exceeded 10;000'. At about 10;500' MSL and leveling at 10;000'; the Cabin Altitude Warning light illuminated and horn sounded. The Cabin Altitude Warning light QRC was initiated but the cabin altitude was below 10;000' so the mask were not donned. The cabin altitude was climbing so I directed the First Officer to close the outflow in accordance the Cabin Altitude Warning QRH. After the cabin pressure was finally stabilized and return [to departure airport] was initiated. The Flight Attendants reported that a Passenger (small child) was experiencing a bleeding nose a possibly bleeding ear. An overweight landing...was accomplished at approximately 149;000 pounds.
[Report narrative contains no additional information.]
B737-800 flight crew reported a Right Pack failure and loss of pressurization on climb out at 12;500 feet with subsequent return to departure airport after regaining control of pressurization.