What was found
PIT/MDT - FLT 1672 - AIRCRAFT WOULD NOT PRESSURIZE AFTER TAKEOFF. RETURNED TO FIELD. REPLACED 4 INCH RUBBER DUCT ON BOTH PACKS. (X)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PIT/MDT - FLT 1672 - AIRCRAFT WOULD NOT PRESSURIZE AFTER TAKEOFF. RETURNED TO FIELD. REPLACED 4 INCH RUBBER DUCT ON BOTH PACKS. (X)