TROOP DOOR UP LOCK, TRAIL EDGE OF THE TROOP DOOR, AND AIR DEFLECTOR10-74. With the trail hand, the JM grasps the troop door lifting bar, raises the door up, and then pulls it back down to the door up lock. A visual inspection of the door up lock verifies that it is in the locked position. Then place the trail hand on the trail edge of the paratroop door.CAUTIONSAll jumpmasters performing duties on a C-17A Globemaster III aircraft must be able to conduct a paratroop door check while maintaining three points of contact with the airframe. This check requires the jumpmaster to attain an 84-inch reach. Jumpmasters must be evaluated by their unit prior to performing any duties on this airframe.All jumpers on the aircraft must enforce rip cord handle awareness at all times. Once the USLM is hooked up to the anchor line cable, the nonstatic line hand will protect or cover the rip cord handle.10-75. With the lead hand, the JM starts at the 12 o’clock position and traces across the top down the trail edge of the paratroop door and across to the 6 o’clock position (middle of the jump platform), then back up to the 12 o’clock of the door to ensure no sharp or protruding edges exist. Then they secure a handhold with their lead hand by grasping the troop door guide or the handhold provided on the lead edge of the door. If for ANY reason the JMs hand breaks contact with the trail edge of the door, the JM must begin the trace of the door over at the top of the door.10-76. The JM will lean towards the trail edge of the door while looking in the direction of flight and will ensure the air deflector is properly deployed.Note. To check the air deflector, the JM can visually inspect the interior angle gauge and verify the wind deflector is at 35 degrees (plus or minus five degrees), then rotate into the paratroop door.