421C Spar AD 91-25-08 R1

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  • #84692

    Model Serial Numbers
    421C 421C0801 through 421C1807

    I didn’t think the post 1980 421 had a wing spar AD, but according to my mechanic, this is due.

    http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/407FCE69FB6E71DD86256A4E00715ABB?OpenDocument&Highlight=91-25-08

    I am being quoted 80 man hours for the inspection.

    Does this seem correct to you guys?

    #102300
    pmcnamee
    Participant

      Yes. This AD is 22 years old. One of the disadvantages of the trailing link landing gear airplanes.

      Is your airplane very low time and never had it done?

      Keep’em Flying

      Pat

      #102303

      It was complied with in 2009, no cracks found.

      #102304

      There is no mention of the kit being installed, so it looks like it is 300 hrs. TIS intervals.

      #102305

      So it would take 1 man 2 weeks to complete the inspection? Seems outrageous, but I’m new to these birds. Might be best to do at annual if possible. Maybe it’s 80 hours to install the kits if cracks are found?

      #102306

      Ha! I knew the pre 1980’s were better airplanes! πŸ™‚

      First I’ve heard of this AD…

      Robert

      #102307
      quote RCJOHNSON:

      Ha! I knew the pre 1980’s were better airplanes! πŸ™‚

      First I’ve heard of this AD…

      Robert

      I think I have heard that somewhere before. πŸ˜‰

      #102309
      quote tallen:

      quote RCJOHNSON:

      Ha! I knew the pre 1980’s were better airplanes! πŸ™‚

      First I’ve heard of this AD…

      Robert

      I think I have heard that somewhere before. πŸ˜‰

      Chuckle… For the record, I would have preferred to have a post serial 801 airplane, but it just wasn’t worth the cost delta. There’s at least a $50k price premium to get the trailing link gear airplanes.

      Robert

      #102310

      Okay, I was thoroughly confused. 😳

      The shop was telling me the inspection was due in 80 hours, not 80 man hours. It is a 5 hour job. Phew!

      There is (was) a kit that can be installed during inspection that eliminates all further inspections if no cracks are found. Cessna no longer makes the kit. During the last inspection, there were no cracks found and no kit installed.

      All that for nothing! :mrgreen:

      #102311

      Why aren’t I ever lucky enough to get confused like that!!! πŸ™‚ Good for you! πŸ˜‰

      #102348

      The kit was available a few years ago and I would expect it to be still available.

      Your shop might not want to install it, but is recommend you add the kit. If you add the kit before any cracks develop, it terminates the AD – no more inspections.

      Make sure you have a good shop like TAS do the install.

      #102416

      Since all of our 421’s are old’ an up charge for the 1980 and above 421’s is nonsense. There is anywhere from a 200-400# weight penalty for trailing link gear as in the very latest model Cessna used 425 parts to complete them. Yes a straight C model is not easy to grease on so what? The trailing link models cannot have winglets either. Our useful is about 2,350lbs so you really can fill all the seats and go a long long ways depending on whether you have someone in seats 7 and eight which we never do unless they’re kids.

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