Gotchas - Rear Seat Hinges and Front Baggage Angle

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Gotchas

Note - The following info is based on fuselage parts that were shipped in January 1999, and on the drawings as received. Some of this information may not be valid with later fuselage parts, later revisions to the drawings or amendments to the Construction Manual.

  1. F-833D Rear Seat Hinges - The dimensions on DWG 29 (rev 1) that show where to put the F-833D Rear Seat Hinges are wrong. Ignore them. The only one that is right is the 1/4" distance for the hinge hole centerline to the edge of the hinge. The outer edges of the hinges need to be 18" apart, as that is the width of the rear seat back.

    Drill both floor pieces (F-830 & F-831) to the seat ribs, then remove and cleco them together on your bench. I put the clecos in from the bottom, plus put a bunch more in other holes over the whole floor area. This allowed the clecos to support the floor as it sat on the workbench. Put a long straight edge (I used a carpenters level) along the line of holes that mount the hinges. You'll probably find that the holes are not all in a straight line (of course I didn't notice this until after drilling my first set of hinges). You want to mount both hinges on the same line, which means you need to average the 1/4" edge distance on the hinges.

    On my floor, I needed to put the most outboard hole in each hinge 9/32" from the aft edge of the hinge. Your mileage may vary. I put a pilot hole in the right hinge, 3/4" from the outboard edge. I clecoed it to the floor, measured between the outboard ends of the hinges (18"), and found that I needed a pilot hole 23/32 from the outboard edge of the left hinge (your floor may be different, depending on the exact width of your fuselage at this point). I clecoed both hinges in place with those pilot holes, then flipped the other half of hinges up 90 degrees from the floor, and clamped them to a long straight edge. This ensured that the two hinges were on the same line when I drilled the rest of the holes.

  2. F-866C Front Baggage angle - DWG 21 (rev 2) shows this angle being attached to the bottom of the F-866A with AN470 rivets. But, the most inboard rivet is behind the flange on the F-870 Front Baggage Floor. I needed to make this rivet an AN426, flush head forward to avoid interference.