RESTRICTED             SECTION I
                  AN 01-25CN-2             PARAGRAPH 1 & 2
fluid, Spec. 3586, or equivalent. A container of hy. draulic fluid is shipped in a separate box packed in the fuselage crate. Substitutes may be a mixture of 50% castor oil and 50% butyl monohydroxyethyl ether or, if not available, use 50% castor oil and 50%, diacetone alcohol.
(13) Check the landi gear and tail wheel retracting units.
(14) Make the electrical connections for the wing at the junction boxes, one on each side of the cockpit.
(15) Install the propeller. (See Section IV for complete instructions.)
(16) Connect the airspeed indicator.
(17) Install the pitot tube and make the necessary electrical connections.
(18) Install the fuel selector valve control rod through the leading edge of the wing panel. When installing the fuel selector valve control rods, be cer. tain the rods line up before fastening them in position. Each rod link is marked with a scribed line or a red painted line running lengthwise of the rod. When in. stalling the control rod links, these marks should line up before fastening the rods in position.
(19) Connect the aileron cables and check the cable tension and aileron travel.
(20) Install the wing tips.
(21) Install the tail fillets.
     
(22) Install the wing fillets.
(23) Clean the cockpit thoroughly of all foreign matter.
(24) Remove all engine cowling.
(25) Remove the protective oil coating from the power plant with kerosene in a spray gun.
(26) Install the air exit duct.
(27) Attach all the enginc cowling.
(28) Attach the keel fairing beneath the wing.
(29) Rotate the propeller by hand until the engine has turned over several times and worked part of the protective coating from the engine. The remainder will mix with the fuel with no harmful effects when the engine is started.
(30) Give the airplane a complete "Pre-Flight - 25Hour" and "50-Hour" inspection.

3. RIGGING.
    The followmg items need not be checked as they have to do with characteristics that are rigidly built into the structure and cannot be altered.
    a. WING RIGGING.
        (1) Dihedral.
        (2) Incidence.
        (3) Sweepback.
    b. LANDING GEAR ALIGNMENT.
        (1) Camber.
        (2) Toe-in.