What was found
CLIMBING THROUGH FLIGHT LEVEL 280, CABIN PRESSURIZATION FAILED IN AUTO MODE AND MANUAL MODE. REMOVED AND REPLACED LEFT AND RIGHT OUTFLOW VALVES. OPS CHECK GOOD PER MM 21-30-51. (M)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CLIMBING THROUGH FLIGHT LEVEL 280, CABIN PRESSURIZATION FAILED IN AUTO MODE AND MANUAL MODE. REMOVED AND REPLACED LEFT AND RIGHT OUTFLOW VALVES. OPS CHECK GOOD PER MM 21-30-51. (M)