What was found
PAE - FLT 3710 - AIR TURNBACK. R-2 AFT SERVICE DOOR LIGHT CAME ON CLIMBING OUT OF 29,500 FEET. REMOVED LINER, ADJUSTED UPPER AND LOWER GATES, ADJUSTED TIMING PER MM 52-41-0. REINSTALLED LINER, PRESSURIZED AIRCRAFT. OPS CHECK GOOD. ACFT TT: 60,705 HRS. ACFT TC: 66,781. (X)