What was found
AT 370 FL COULD NOT CONTROL CABIN CLIMB IN AUTO, STANBY, OR MANUAL CLIMBING AT 1000 FT IAW MIN HAD TO DESCENT TO MAINTAIN 9500 FT CABIN AT FL 290. FOUND FWD AVIONICS DOOR LEAKING, RESET DOOR & PRESSURIZED ACFT TO 5 PSID & INSPECTED ALL DOORS ACFT OK FOR CONTINUED SERVICE IAW MM 21-00.