1 / 9

Teflon Tape – Friend or Foe

Teflon Tape – Friend or Foe. Teflon tape is the plumbers’ friend I have used it many times to stop an annoying leak in air line fittings So why not use it to stop leaks on aircraft hydraulic and oil lines? Read on and we’ll see why it is NOT a friend when used on aircraft systems.

braden
Télécharger la présentation

Teflon Tape – Friend or Foe

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Teflon Tape – Friend or Foe • Teflon tape is the plumbers’ friend • I have used it many times to stop an annoying leak in air line fittings • So why not use it to stop leaks on aircraft hydraulic and oil lines? • Read on and we’ll see why it is NOT a friend when used on aircraft systems Advances Automatically #1 .

  2. Teflon Tape Was the Culprit One Person Died in this Aircraft #2 .

  3. The pilot took off with a full load of loggers on their way home The gravel airstrip was located up a narrow valley with the river along side of it making it a one way in and one way out Everything seemed normal until just after the gear was retracted The left engine suddenly lost power and the aircraft swung wildly toward the left mountain side He straightened the aircraft and adjusted the trim for the power loss Suddenly the power came back on stronger than before causing the aircraft to swing violently toward the right mountain side Even with full opposite rudder the aircraft was still heading for disaster Not knowing what was happening but knowing that if this kept up they would all die, he Cut the power and belly landed in the river One person would not get out of the aircraft alive So What Happened? What Caused the Engine Surges? #3

  4. Teflon Tape • This tape was found inside the controller for the turbocharger wastegate • The tape had plugged a critical orifice and than squeezed through • This had caused the engine to suddenly lose than gain power #4 .

  5. Teflon Tape • Tape after squeezing through the calibrated orifice So how did it get there? #5 .

  6. An AME had just recently replaced a pipe thread fitting into the controller BUT he had not used teflon tape But the person before him had Small strips of the tape remained in the controller threads until he put the new fitting in This pushed these almost invisible killers into the oil system above the oil filter and set them in place to cause a fatal accident So how did it get there? First Time Something Like This Had Happened? #6

  7. A 747, fully loaded, departed Vancouver headed for Hong Kong The one of the main gear would not retract so an emergency was declared and after dumping tons of fuel out over the water it landed without further incident The aircraft was taken to the hangar where several retraction tests were carried out without any problem Hydraulic filters were changed and after refueling, the load of now nervous passengers boarded for their flight Murphy was alive and well as once more the main gear would not retract in flight and the water was treated to another dose of jet fuel With the next trip to the hangar came the order – don’t send it back until you are absolutely sure the gear will function as designed Every hydraulic component in the main gear was replaced AND I’m Afraid Not #7 .

  8. A much smaller number of nervous passengers departed for a normal flight to Hong Kong Each removed component was carefully disassembled under the watchful eye of Quality Control Finally the culprit was found in one of the main landing gear door sequence valves It was, you guessed it, a tiny piece of AND Teflon Tape • That piece of teflon tape had cost them over $1/4 million dollars plus the loss of public confidence • They went through every toolbox in the hangar looking for the guilty party (Thank goodness I had taken it home – Just kidding) • Not me thank goodness Don’t let it be YOU #8 .

  9. It can wait a long time before striking If you are lucky, it will only cost money Or it can become a silent killer Don’t give it a chance to strike Teflon Tape is a Foe to Aviation DO NOT USE TEFLON TAPE ANYWHERE NEAR AN AIRCRAFT OR ITS COMPONENTS Have a Safe Career Gordon Dupont #9

More Related