{
  "$type": "site.standard.document",
  "description": "A fuel control system (100) for a gas turbine engine (10) includes a fuel metering valve (140), a pressure raising and shut-off valve (PRSOV) (160), and a shutoff effector (200) including a first stage unit (210) that is electrically powered and a second stage unit (250) that is controlled by the…",
  "path": "/patents/1399314",
  "publishedAt": "2026-01-21T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02C7/232",
    "ROLLS ROYCE PLC [GB]"
  ],
  "textContent": "A fuel control system (100) for a gas turbine engine (10) includes a fuel metering valve (140), a pressure raising and shut-off valve (PRSOV) (160), and a shutoff effector (200) including a first stage unit (210) that is electrically powered and a second stage unit (250) that is controlled by the first stage unit (210). The second stage unit (250) actuates a valve member (162) of the PRSOV (160) between an open position (162A) that allows supply of a fuel to burners of the gas turbine engine (10) and a closed position (162B) that prevents supply of the fuel to the burners. Upon loss of electrical power to the first stage unit (210) during operation of the gas turbine engine (10), the first stage unit (210) is configured to: control the second stage unit (250) to actuate the valve member (162) of the PRSOV (160) to the closed position (162B) after a predetermined time duration (T1); or retain the valve member (162) of the PRSOV (160) in the open position (162A).",
  "title": "FUEL CONTROL SYSTEM"
}