Install the safety devices on the landing gears as required (3 in total), make sure they can be obviously seen. 2. Drain potable water and waste water completely to avoid freezing. NOTE: It is cold weather maintenance task and performed it if the environment temperature under 0 °C. 3. Walk around the aircraft to check for obvious damage and leakage of the aircraft and engine external surface . Do the following steps when you walk around the aircraft: A. Nose fuselage and NLG area: (1) Inspect the nose area for damage. (2) Nose landing gear area: (a) Check the nose wheel well equipments are in good condition and have no leakage in the parts and tubes. (b) Check the nose landing gear wheel tires and hubs for damage, the wear of the tires should be within the limit. (c) Clean exposed surface of FWD LG strut piston with a cloth moistened with BMS3-32 TYPE II hydraulic fluid and wipe with dry cloth 。