• Squiddork@lemmy.world
    1·
    2 days ago

    Glad to know giving the thing you just fixed up a quick slap of encouragement is allowed for aviation mechanics.

  • Grumpy@sh.itjust.works
    1·
    2 days ago

    Could’ve been just a greasy hand when it was off and not hot. The patina can then build differently there because of the residue.

    • PerogiBoi@lemmy.ca
      1·
      2 days ago

      That’s exactly it. If you touch the exhaust pipes of a motorcycle when it’s off, it will burn an imprint on when the engine is on. The oil burns and leaves a print