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  • Chapter 12: Hydraulic & Pneumatic Power Systems › Accumulators › Types of Accumulators

    perform the same function as the filler valve installed in the spherical accumulator. [Figure 12-50] Operation In operation, the compressed-air chamber is charged to a predetermined pressure that is somewhat lower than the system operating pressure. This initial ... charge is referred to as the accumulator preload. As an example of accumulator operation, let us assume that the cylindrical accumulator is designed for a preload of 1,300 psi in a 3,000-psi system. When the initial charge…

  • 14 CFR Part 135, Appendix A to Part 135—Additional Airworthiness Standards for 10 or More Passenger Airplanes

    More Passenger Airplanes In addition, there must be means to indicate to appropriate flight crewmembers the functioning of the powerplant ice protection system. 49. Turbine engine bleed air systems. Turbine engine bleed air systems of turbopropeller powered airplanes must ... must consider that a failure of the duct can occur anywhere between the engine port and the airplane bleed service; and (b) That, if the bleed air system is used for direct cabin pressurization, it is not possible for hazardous…

  • Pilot/Controller Glossary › R

    Drained by grading or storm sewers to prevent water accumulation; c. Capable, under dry conditions, of supporting snow removal equipment, aircraft rescue and firefighting equipment, and the occasional passage of aircraft without causing structural damage to the aircraft ... safety criteria used in these programs are developed by the Office of Flight Operations. Runway use programs are administered by the Air Traffic Service as “Formal” or “Informal” programs…