Course Hero Logo

B one or more broken pawl springs c the pawls re

Course Hero uses AI to attempt to automatically extract content from documents to surface to you and others so you can study better, e.g., in search results, to enrich docs, and more. This preview shows page 163 - 164 out of 362 pages.

B-one or more broken pawl springs.C-the pawls re-contacting and riding on the ratchetgear.8627.LO4Pneumatic starters are usually designed with whattypes of airflow impingement systems?A-Radial inward flow turbine and axial-flow tur-bine.B-Centrifugal compressor and axial-flow compres-sor.C-Double entry centrifugal outward flow and axial-flow turbines.8628.LO4Inspection of pneumatic starters by maintenance tech-nicians usually includes checking theA-oil level and magnetic drain plug condition.B-stator and rotor blades forFOD.C-rotor alignment.8629.LO4Air turbine starters are generally designed so thatreduction gear distress or damage may be detected byA-characteristic sounds from the starter assemblyduring engine start.B-breakage of a shear section on the starter driveshaft.C-inspection of a magnetic chip detector.8630.LO4Airflow to the pneumatic starter from a ground unit isnormally prevented from causing starter overspeedduring engine start byA-stator nozzle design that chokes airflow and sta-bilizes turbine wheel speed.B-activation of a flyweight cutout switch.C-a preset timed cutoff of the airflow at the source.8626. Answer C. AC 65-1 2AIn a pneumatic starter that incorporates a sprag clutchratchet assembly, the pawls are forced inward by smallleaf springs to engage the sprag clutch ratchet whenthe engine is at rest. However, once the enginereaches a given rpm during a start, centrifugal forcepulls the pawls outward, disengaging them from thesprag clutch ratchet. On coastdown the springs forcethe pawls to ride the ratchet gear until the enginecomes to a stop. Answers (A) and(B)are wrongbecause the clicking sound indicates normal operation.8627. Answer A. ITP-P2Pneumatic starters that utilize a low pressure, high vol-ume air supply typically employ a radial inward flowturbine or an axial-flow turbine. Answer(B)is incorrectbecause pneumatic starters receive compressed airfrom an outside source and, therefore, do not incorpo-rate a compressor as a component. Answer (C) iswrong because there is no such thing as a doubleentry centrifugal outward flow turbine.8628. Answer A. ITP-P2Because of their high rotational speed, pneumaticstarters require frequent inspection of their oil level andthe condition of their magnetic drain plugs. Answer (B)is wrong because pneumatic starters rarely sustaindamage from foreign objects, and answer (C) is wrongbecause a pneumatic starter's rotor alignment is typi-cally checked at overhaul.8629. Answer C. ITP-P2Most air turbine starters utilize a self-contained lubrica-tion system that incorporates a magnetic chip detector.When inspecting a chip detector, if metallic particlesare found, it may indicate internal stress or damage tothe starter's reduction gearing (answer C). Answer (A)is incorrect because starters are not designed to makea specific sound to indicate reduction gear damage.

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 362 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Fall
Professor
N/A
Tags
Internal combustion engine, Engine technology, compression ratio, Cylinder head, Engine displacement, camshaft

Newly uploaded documents

Show More

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture