Results 1 to 3 of 3

Thread: Elevator Jackscrew Bushing Hole size

  1. #1
    Senior Member
    Join Date
    Jul 2014
    Location
    NZAR
    Posts
    102

    Default Elevator Jackscrew Bushing Hole size

    On Page 106 of the Fuselage manual there is a requirement to drill a #12 (3/16") bit hole in the forward rudder post to hold the jackscrew (TC2538001) firm. The outside diameter of the Jackscrew Thrust bushing (SC82103-001) is at minimum 1/4 inch OD requiring a larger hole than #12 to be drilled to fit the bushing containing the AN3-12A bolt.
    There is no suggestion that the earlier #12 drill size was a pilot. The best illustration is Photo 194 on page 106.
    Is the #12 drill bit size incorrect or am I missing some instruction?
    Last edited by karaka29211; 04-25-2018 at 12:57 PM.

  2. #2
    Member
    Join Date
    Sep 2015
    Location
    Oxfordshire, UK
    Posts
    96

    Default Re: Elevator Jackscrew Bushing Hole size

    I seem to recall discussing a similar issue with Mitch some time back. Check the dropbox to make sure you've got the latest fuselage manual. They often revise the manual with no changes to the revision sheet which can be a bit misleading.

    My version has the following text:
    Install the jackscrew thrust bushing (SC82103-001) by
    match drilling using a letter F drill bit. When the
    jackscrew and thrust bearing are installed, there should
    be no vertical movement in the jackscrew. The
    jackscrew should rotate freely. Use Figure FS32 for
    selection of the fasteners.

  3. #3
    Senior Member
    Join Date
    Jul 2014
    Location
    NZAR
    Posts
    102

    Default Re: Elevator Jackscrew Bushing Hole size

    Thanks, that would work F drill bit is just over 1/4" at .257 inch.

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •