Desert creatures strike!Pilots and mechanics have discovered that desert critters can find any hole to live and nest. If engine startup on your Chinook Chinook, indigenous people of North America Chinook (shĭn  k`, chĭ–), Native American tribe of the Penutian linguistic stock. sounds hung or like it's choking on sand, the culprit could just be a desert bug in the engine hydro-mechanical unit (HMU HMU Height Monitoring UnitHMU Hanoi Medical University HMU Hydromechanical Unit HMU Hair/Makeup (film production) HMU Hit Me Up (phone, text or email me) HMU Helmet Mounted Unit ) vent hole. Believe it! You know there's a problem because as soon as you crank engine 1 or 2, the power turbine inlet temperature (PTIT PTIT Power Turbine Inlet Temperature ) rises and the N1 gauge doesn't increase past 40 percent. Have a mechanic inspect the HMU's atmospheric vent hole. It could have a bug in the hole. Bugs make the hole a nest and plug up the vent. This prevents engine startup because the atmospheric vent helps the engines to start properly--as long as the vent hole is clear. Clear up engine startup problems by clearing out the vent hole with a pipe cleaner, 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 9920-00-292-9946. This can be done on the aircraft without removing the HMU. During startup if engine doesn't start, check PTIT gauge ... |
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