- Removal / Installation 0.0 0.0 Hrs 3.00 04D4003.001 GVSP417/SB5938 0 0 CI_ 498584.996400 No 0 11 Feb 2013 Airframe 71.13.01 711021 Upper Cowl Door (Left) Removal / Installation 0.0 0.0 Hrs 2.00 04D4001.001 GVSP4171SB5937 0 0 CiL 302993.040000 No 0 11 Feb 2013 Airframe 71.12.01 711022 Upper Cowl Door (Right) -