BOEING 707-320/420 - Centre Panel

707 Engine Gauges

The Main Engine Instruments

  • The 707 has 20 main engine dials, arranged in columns for each of the four engines. From top to bottom they are Engine Pressure Ratio (EPR), N1 RPM, Exhaust Gas Temperature, N2 RPM and Fuel Flow.
  • EPR is the main indication of thrust, and these gauges have numeric readouts in addition to the needles.
  • Above the EPR dials, there are thrust reverser indicator lights. The left 'REV OPT' light indicates comes on while the reverser is extending or retracting, while the right blue light comes on when the engine is established in reversed mode.
  • The readouts on the Fuel Flow dials indicate the total fuel used by each engine. These readouts may be reset to zero by clicking on them.
  • Appropriate gauges are included for Pratt & Whitney JT4A, Pratt & Whitney JT3D and Rolls-Royce Conway engines (JT3D gauges are shown left). The Conway engines use P7 pressure gauges instead of EPR gauges.
  • Fuel flow rates are given in pounds or kilograms per hour, depending on your International preferences.

Left Side Instruments

Flight Director Switch and Ice Warning Light - the switch turns on the Flight Director cross-hairs on the ADI. The Ice Detector light indicates when there is a risk of icing. Since it is not possible to detect moisture from within the FS2004 SDK, this light is faked - it may come on when below FL 230 with the temperature between -15 deg. C and 5 deg. C. The light is more likely to come on in low-pressure conditions (as more moisture exists in such conditions).

True Airspeed Indicator- this indicates knots TAS, and is useful for navigation purposes.

Backup Attitude Indicator - unlike the ADI, this can run from battery power alone, and is used when AC electrical power is unavailable (for example, failure of all engines).

Glide Slope Warning Light- this light flashes if you go dangerously below the ILS glide slope during a landing approach

Right Side Instruments

Configuration Warning - this light flashes (and an audible warning sounds) if the aircraft is put into a dangerous or illogical configuration

  1. Throttle above 60%, on ground, with flaps not at take-off setting (14 or 25 degrees)
  2. Throttle above 20% with spoilers extended
  3. Gear down above 270 KIAS
  4. Flaps down above 223 KIAS
  5. Flaps less than 40 in a descent at less than 160 KIAS
  6. Flaps 40 or greater with gear up
  7. Speed below 135 KIAS with gear up

Flap Indicators - these indicate the position of the flaps.

Leading Edge Flap Lights- the leading edge flaps deploy automatically when the trailing edge flaps are set to 14 degrees or greater.

Engine Fire Handles

Stowed fire handle Pulled fire handle Pulled fire handle, extinguisher on The 707 has characteristic emergency engine shut-off handles for each engine on the glare-shield. These handles may be pulled to shut off the engines. When the handle is pulled, clicking on the upper part activates the extinguisher (this is indicated by a light next to the handle), while the lower part resets the handle.

Altitude Alerter

The altitude alerter is used as a reminder of assigned flight level. On approaching the selected altitude, a tone sounds and a light comes on on the altimeters when 700 feet away. The light also comes on (and the tone sounds) if deviating more than 300 feet from the selected altitude. The Altitude Alerter is not an automatic altitude capture function - one must manually level off when reaching an assigned altitude! .Stowed fire handle

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