B737-700
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 113
Aircraft Equipment Problem Less Severe
Flight Crew Diverted; Flight Crew FLC complied w / Automation / Advisory
Aircraft
Walk around by FO was uneventful. Preflight was uneventful. While taxiing out; we received a right pack trip light and followed the QRH to a successful reset. Upon advancing the throttles and commencing the takeoff roll; we received another Right Pack Trip Off light (prior to 80 knots) and elected to continue the takeoff roll since the Right Pack Trip Off light was successfully reset previously. Approximately at or above V1; we received an Auto Fail light on the pressurization panel with associated Master Caution lights. We continued airborne with a normal departure except we leveled off at 10;000 ft and informed ATC of our situation. Upon investigation; we found the Auto Fail light illuminated on the pressurization panel with the digital numbers populated with dashes. We followed the QRH and reset the Right Pack Trip light and the Pack light extinguished. We next turned our attention to the Auto Fail light and following the QRH. We identified and selected ALTN with no changes in the cabin pressure or the panel. We continued the QRH by selecting MAN mode with no changes in the cabin pressure or the panel. The outflow valve remained in the closed position with the valve switch unable to move the outflow valve.We sent an ACARS message to Dispatch and Maintenance and diverted upon their input. Upon descent; the pressure panel seemed to return to normal operations. When we returned to ALTN mode; there was huge change in the cabin pressure and elected to return the switch to manual and leave it there the remainder of the flight. The cabin pressure mirrored the outside ambient pressure and we informed ATC of a shallow descent into ZZZ.Subsequent landing; rollout; and taxi were normal to the gate. No CBs were noted tripped at any time during the incident. No emergencies were declared; no Warning horns sounded; and no Passenger oxygen masks dropped. Upon gate arrival; personal contact Maintenance was achieved and all were briefed and the logbook annotated. Phone contact to Maintenance; Dispatch; Chief Pilot and Chief Pilot on Call was all accomplished shortly after arrival.
B737-700 crew experienced a pressurization failure during takeoff; which resulted in a diversion to a nearby airport.