Keep snow birds flying.Unlike most birds, yours don't get to fly south for the winter. In order to keep them going, crew chiefs have to do some tough work. Leaving your aircraft uncovered and unprotected on the flight line can make that job even harder. If covering the whole bird is too tough, cover at least the bare minimum: engine inlets, exhausts, exposed linkages, pitot tubes, canopies and rotor heads. Make sure that the aircraft and covers are dry before putting the covers on the aircraft or you run the risk of them freezing on the aircraft. If the aircraft is moving from the hanger to the flight line, cover it before it moves. If your cover and bird make an ice sandwich, loosen the cover edges and use heat from a ground heater to finish off the job. Check uncovered areas daily. Freezing rain Freezing Rain is a type of precipitation that begins as snow at higher altitude, falling from a cloud towards earth, melts completely on its way down while passing through a layer of air above freezing temperature, and then or blowing snow Blowing snow[1] is snow lifted from the surface by the wind, at a height of 8 feet (2 meters) or more, that will reduce visibility. Blowing snow can come from falling snow or snow that already accumulated on the ground but is picked up and blown about by strong winds. can seep into and freeze exposed moving parts Moving parts are the components of a device that undergo continuous or frequent motion, most commonly rotation. "Parts" only include the mechanical components which does not include fuel, or any other gas or liquid. . Make sure everything works and is not frozen. Snow, sleet sleet, precipitation of small, partially melted grains of ice. As raindrops fall from clouds, they pass through layers of air at different temperatures. If they pass through a layer with a temperature below the freezing point, they turn into sleet. and ice storms can cause more trouble. After a storm, remove the engine inlet plugs and exhaust covers and look for ice. Carefully remove any ice you find the way your TM instructs, and thaw out the engine with hot air. Never remove ice by scraping or chipping. Always apply heat or de-ice liquid. ANVIS ANVIS Aviator's Night Vision Imaging System OBJECTIVE On Page 61 of PS 629, we printed a brief on ordering aviation night vision imaging system (ANVIS) objective lenses. The headshed at PEO Soldier has provided additional clarification: If you have to replace an ANVIS objective lens assembly on the binocular binocular, small optical instrument consisting of two similar telescopes mounted on a single frame so that separate images enter each of the viewer's eyes. As with a single telescope, distant objects appear magnified, but the binocular has the additional advantage , be sure to replace it with the same type of objective lens assembly. ANVIS objective lens assemblies must be matched by PN. Don't mix objective lens types on the same binocular. LENS CLARIFICATION There are three possible ANVIS objectives lenses: * PN 5002550; NSN NSN National Stock Number NSN Nokia Siemens Networks NSN National Storytelling Network NSN NATO Stock Number NSN New Substances Notification (CEPA) NSN National Student Number (NZ) NSN Never Say Never 5855-01-149-4101 * PN A3279595, NSN 5855-01-476-1481 * PN A3279596, NSN 5855-01-519-4171 The number on the 5002550 objective lens is printed inside the lens assembly on the cell assembly, so you'll have to open the assembly to see it. The PNs for the A3279595 and A3279596 are easier to see because they're printed around the edge of the cell assembly. You'll find it handy to write the PN of the objective lens assemblies on the historical record for each ANVIS to track them. |
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