. WO #: SC10420 Invoice Number 7112000954 Resolution: Removed "O" rings on all 3 oxygen cylinder air lines and installed new o-rings P/N MS22012-6 IAW G-IIB AMM 35.00-00. Billing Method Hours Rate Total Labor USD: Time and Material ST 6.81 @ $115.00 $783.15 Pans USD: Time and Material $48.04 T