What was found
PRESSURIZATION "AUTO FAIL" LIGHT CAME ON AT FL340 CABIN DIFT-7.8 CABIN PRESS 6500FT QRH 2.2 ACCOMPLISHED. GROUNDED - YES. ON DEFERRAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PRESSURIZATION "AUTO FAIL" LIGHT CAME ON AT FL340 CABIN DIFT-7.8 CABIN PRESS 6500FT QRH 2.2 ACCOMPLISHED. GROUNDED - YES. ON DEFERRAL.