Royally P.O.'d at an A&P/IA

Discussion in 'Maintenance Bay' started by bluerooster, Dec 13, 2015.

  1. Silvaire

    Silvaire En-Route

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    That I would say is not intergranular corrosion. Someone at some time in the past must have spilled something extremely corrosive which soaked into the carpet or it could have been rodent urine. The adjacent floor may have been protected either by glue or tape applied to hold the carpet in place.

    Are there any other indications of rodent presence such as gnawed upholstery and such?
     
  2. GlennAB1

    GlennAB1 Ejection Handle Pulled

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    Not at all, others should learn from my mistake. I have tools that are greatly devalued by having my last 4 of my SSN on them.
     
  3. GlennAB1

    GlennAB1 Ejection Handle Pulled

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    It's an old argument that can't be proved, later stage intergranular, and exfoliation, look the same. It doesn't matter, it has to be repaired.
     
  4. Tom-D

    Tom-D Taxi to Parking PoA Supporter

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    there are X-ray machines that can show the difference.
     
  5. GlennAB1

    GlennAB1 Ejection Handle Pulled

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    Of course, destructive and nondestructive testing can be used, but for what reason? Ok, it can't be proven without extensive testing. Better?
     
    Last edited: Dec 18, 2015
  6. Tom-D

    Tom-D Taxi to Parking PoA Supporter

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    To determine the repair? how far back do we have to cut this thing? How much of a patch do we need? Oh this is beyond repair?
     
  7. GlennAB1

    GlennAB1 Ejection Handle Pulled

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    And, for the record, I've been Level 2 in ET, UT, PT, MT and RT for over 20 years.
     
  8. GlennAB1

    GlennAB1 Ejection Handle Pulled

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    Been there so many times, you keep removing corrosion till you don't find anymore, that's every SRM requirement I've ever seen. Boeing, Douglas, Lockheed.
     
  9. Silvaire

    Silvaire En-Route

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    IGC is normally associated with a material defect usually caused by a manufacturing process error. If this were IGC there would be other Piper seat rails affected, there'd probably be an AD. I've never seen anything like that on a PA28 before, had to be some seriously caustic substance in contact for a lengthy time aided by being retained by the carpet under which there is normally nothing to inspect.
     
  10. GlennAB1

    GlennAB1 Ejection Handle Pulled

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    Or, reporting this discrepancy could result in creation of a new SB and possibly AD.
     
  11. Tom-D

    Tom-D Taxi to Parking PoA Supporter

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    We did the Xray thing on every EA6B aft wing spar cracking issue for well over 5 years, corrosion isn't much different in this respect, you dye it remove it, dye it again, rinse and repeat until it is gone. then evaluate what you have.
    Xray is simply a hell of a lot easier.
     
  12. GlennAB1

    GlennAB1 Ejection Handle Pulled

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    We x-rayed L1011wing spars for the same. It was like 30 shots per wing. Sometimes an all day break for the 40 or so mechanics not involved with the inspection.
    .
     
  13. GlennAB1

    GlennAB1 Ejection Handle Pulled

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    With x-ray, you don't just go out blasting, you have a procedure to follow, and there aren't procedures covering the x-ray insp of every part of the aircraft. At least not on the aircraft I've worked on. There are very specific areas and procedures.
     
  14. bluerooster

    bluerooster Pattern Altitude

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    My guess is along those lines, however, two tracks, on opposite sides of the airplane are the only things affected. The skin they attach to is in good shape. The way it's flaking off in layers, and the appearance that it's started internally, leads me to think Intergranular, in the late stages.

    And no sign of rodents, but I did find what appeared to be a 30 year old cigarette butt in the tailcone.
     
  15. SkyDog58

    SkyDog58 Touchdown! Greaser! PoA Supporter

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    Where did you work on the L-1011?
     
  16. GlennAB1

    GlennAB1 Ejection Handle Pulled

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    ATA IND '87 to "97
     
  17. ifly4fun

    ifly4fun Line Up and Wait

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    Could these have been replaced previously with sub-standard replacement parts?
     
  18. SkyDog58

    SkyDog58 Touchdown! Greaser! PoA Supporter

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    ex-ATA here as well. PM sent.
     
  19. bluerooster

    bluerooster Pattern Altitude

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    Possible, but not probable. They appear to be the ones it was born with.
     
  20. Checkout_my_Six

    Checkout_my_Six Touchdown! Greaser!

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    What's all this costing?
     
  21. bluerooster

    bluerooster Pattern Altitude

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    ~$400 for the tracks, cost of rivets, and several hours of my time, plus a few minutes of the IAs time.
     
  22. brian]

    brian] Cleared for Takeoff

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    Um, less than $1K. Ok, I admit I'm new to this game of aircraft ownership, but this kinda sounds like a non event....
     
  23. Checkout_my_Six

    Checkout_my_Six Touchdown! Greaser!

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    ya but....let's not discount the story.....and the tears. :D:yes:
     
  24. fiveoboy01

    fiveoboy01 Pattern Altitude

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    Non event because the metal underneath was OK.

    Glad it was just the track. I just paid for a full engine overhaul at 100 hours post-purchase, so I know the pain and I'm happy you aren't going through it:)
     
  25. GlennAB1

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    Shouldn't need IA, minor repair.
     
  26. bluerooster

    bluerooster Pattern Altitude

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    A&P just happens to hold an IA, and will need to sign off on the rest of the annual insp. anyway. ;)
     
  27. bluerooster

    bluerooster Pattern Altitude

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    Now for the snowballs. I went out today to finish singling up all the extraneous wiring that had been installed over the years. And found a puddle of water in the pilots floorboard forward part. Now where did all that come from? I found that when we get about a foot of rain, it comes in around the fresh air vents. Apparently the gaskets don't last forever. So I'll be replacing them while I have the interrior out. :sigh: And I need to find some (affordable) insulation that doesn't absorb moisture.
     
  28. GlennAB1

    GlennAB1 Ejection Handle Pulled

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    A 'Radiant Barrier'.