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GAS TURBINE ENGINE MOTORING WITH STARTER AIR VALVE MANUAL OVERRIDE

  • US 20180094588A1
  • Filed: 09/30/2016
  • Published: 04/05/2018
  • Est. Priority Date: 09/30/2016
  • Status: Active Grant
First Claim
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1. A system for gas turbine engine motoring, the system comprising:

  • an air turbine starter coupled to a gearbox of a gas turbine engine;

    a starter air valve in fluid communication with the air turbine starter to drive motoring of the gas turbine engine responsive to a regulated pressure from a compressed air source; and

    a manual override of the starter air valve, the manual override adjustable to one or more predefined intermediate positions that partially open the starter air valve to limit a motoring speed of the gas turbine engine below a resonance speed of a starting spool of the gas turbine engine responsive to the regulated pressure.

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