The gear leg fairing must be aligned with no load on the wheels simulating the in-flight condition of the gear legs. The following steps require the aircraft to be supported by jacks far enough off the ground that the wheels no longer touch. Level the aircraft at the F-1015C-L/R Mid Cabin Decks.
Slip the U-1017-l Gear Leg Fairing over the gear legs and brake lines and insert the hinge pin from the bottom. The hinge pin is thin enough to curve during insertion without taking excessive permanent bend. Roughly align the gear leg fairing to the airflow and the notched centerline marks with the gear leg centerline. Clamp the gear leg fairing to the gear leg to temporarily hold it in place. The alignment of the fa irings is important and can significantly affect the way the airplane flies. While a very careful "eyeball" alignment job might come close this is made difficult because of the sweep back of the gear legs.
Drop plumb bobs from the aircraft centerline to the floor and snap a line on the floor between theses two points. Create a displaced centerline on the floor beneath an arbitrary point "A" on the horizontal part of the WD-1007-L Step. Drop a plumb bob from point "A" to the floor and measure the span wise distance "X" from below point "A" to the center of the fuselage. Snap a line from below the step forward past the gear leg fairing the distance "X" from and parallel to the aircraft centerline. Drop a plumb bob from the leading edge of the U-1017-L Gear Leg Fairing to the displaced centerline. This locates point "8" on the leading edge of the fairing.
Wrap a string around the leading edge of the U-1017-L Gear Leg Fairing at point "8" and pull both ends tight to the spring clamp at "A". Be sure the string is level and parallel to the F-1015C-L Mid Cabin Deck. Measuring from the floor will be adequate here. When the leading and trailing edges of the gear leg fairing are centered between the strings the gear leg fairing is properly aligned.