Cessna 310 1975 Owner's Manual page 20

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(6) Fuel Selectors - OFF (if a long period of inactivi-
ty is anticipated).
NOTE
Do not leave the fuel selectors in the
intermediate position as fuel from the main
tip tanks will transfer into the auxiliary
tanks.
(7) Magnetos Switches - OFF, after engines stop.
(8) Battery and Alternators - OFF.
(9) Parking Brake - SET.
(10) Control Lock(s) - INSTALL.
(11) Cabin Door - CLOSE.
NOTE
To securely latch the cabin door from the
outside, the exterior door handle must be
rotated clockwise to its stop.