If the lines (steering or suspension lines) become re - stricted, such as around part of an outrigger, a trim  lock, or an accessory —then while safely maintaining  your ground direction into the wind and holding your  RPM down to kiting speed—reach out and push the  line off of the restricting object. If this is not possible,  then shut the PPC down and abort the takeoff. To abort a takeoff (i.e., to shutdown) maintain your  ground steering clear of obstacles as you: (1) power  down the throttle, (2) push the magneto switches into  the OFF position, and (3) pull the wing down. If the lines become entangled or embedded with de - bris, then shut the PPC down and clean up the lines.  If you don’t, and you load the wing by beginning the  lift-off, the stress on the lines as they pull through  the debris (twigs, sticks, and so forth) can break the  lines. If the lines go under a wheel, IMMEDIATELY abort  the takeoff. Shut down: power, magnetos and wing  down. The term “wall” is simply defined as the canopy liter - ally forming a wall-like appearance behind the PPC.  [Figure 12-3] The trailing edge of the canopy is still  on the ground, while the leading edge of the canopy  forms the top of the wall. The “wall” is the first can - opy problem that might occur during the initial kiting  of the wing. There are two techniques that can be used to correct  this “parachutal-wing stall” position of a rectangular  wing: A wing “lock-out” occurs when the initial forward  momentum is insufficient to move the canopy through  the prop-wash and up and above the PPC cart. [Figure  12-4] During this phenomenon, the inflated canopy  will hang at about a 45° angle behind the cart. This  is a “parachutal-wing stall” while the pilot is still on  the ground. Usually, regardless of how much ground - speed is increased, the wing will stay in a parachutal- wing stall behind the cart as long as the tension on the  suspension lines remains the same; the wing will stay  “locked-out” in that 45° position. Even though some pilots will try to “pop” the canopy  out of the “wall,” the only safe solution is to immedi - ately abort the takeoff, and re-layout the canopy. By  shutting down and restarting the takeoff preflight, pi - lots will save the expense of many line and propeller  repairs. Lines will inevitably become damaged when  a pilot tries to “pop” the canopy out of the wall via  sharp throttle movements. When you fight the wall,  you create an ideal situation for lines to get sucked  into the propeller. Restricted Lines During the Takeoff Roll Entangled or Embedded Lines Lines Caught Under a Wheel A Wing Wall A Wing Lock-Out Figure 12-4. A wing lock-out.  Figure 12-3. A wing wall. 1. Lower the groundspeed until the canopy begins  to fall down and back behind the cart. Then  before the wing touches the ground, smoothly  and firmly increase the groundspeed to move  (“sling-shot”) the canopy up and above the cart. 2. Maintain the groundspeed and pull the canopy  back via a flare (i.e., pushing both foot steering  bars). Hold the flare until the drag caused on the  tail of the wing pulls the wing back down—about  a 60° angle— and then smoothly release the flare.  The release of the flare will again “sling-shot”  the canopy up and above the cart. 12-3