Dirty dozen in aviation

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Taxiing Aircraft

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Taxiing Aircraft As a general rule, only rated pilots and qualified airframe and powerplant (A&P) technicians are authorized to start, run up, and taxi aircraft. All taxiing operations are performed in accordance with applicable local regulations. Figure 1 contains the standard taxi light signals used by control towers to control and expedite the taxiing of aircraft. The following section provides detailed instructions on taxi signals and related taxi instructions.  Lights  Meaning Flashing green  Cleared to taxi Steady red  Stop Flashing red  Taxi clear of runway in use Flashing white  Return to starting point Alternating red and green  Exercise extreme caution Figure 1. Standard taxi light signals Taxi Signals Many ground accidents have occurred as a result of improper technique in taxiing aircraft. Although the pilot is ultimately responsible for the aircraft until the engine is stopped, a taxi signalman can assist the pilot around the flight li...
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Punch (tool)

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Read in another language Watch this page Edit For punches used in punch presses, see Punching . Learn more This article has multiple issues. Please help improve it or discuss these issues on the talk page .  Engraving punch A punch is a hard metal rod with a sharp tip at one end and a blunt butt end at the other, which is usually struck by a hammer . Typically, woodworkers use a ball-peen hammer to strike a punch. Use Edit Punches are used to drive objects such as nails , or to form an impression of the tip on a workpiece. Decorative punches may also be used to create a pattern or even form an image.[ citation needed ] Pin Edit Pin punch Metal pins and similar connectors are driven in or out of holes using a pin punch. For removal, first use a starter punch to loosen the pin, then use a pin punch to finish. Center Edit Centre punch A center punch is used to mark the center of a point. It is usually used to mark the center of a hole when drilling holes. A drill has the tenden...
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Splicing

 Splice is a mettalic barrel on both ends if this barrrel ends of broken wire are inserted on either side  then barrel is crimped with crimping tool. Splice comes in varieties.  Some of them are pre insulated while other needs to a sleeve over it to avoid contact with other metallic parts <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle"      style="display:block; text-align:center;"      data-ad-layout="in-article"      data-ad-format="fluid"      data-ad-client="ca-pub-3594006331358944"      data-ad-slot="7745808678"></ins> <script>      (adsbygoogle = window.adsbygoogle || []).push({}); </script> https://www.googleadservices.com
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