BOEING 707-420 - Centre Panel

| 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. For Pratt and Whitney JT3D engines, 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. Flying Tip: The JT3D has rather slow response to the throttle, so extra care is needed on the landing approach. Also, you should be careful when flying 'clean' at low altitude - it is easy to overspeed if you are not keeping ahead of the engines!

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 FS2000 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. It also means there is no excuse not display Indicated Airspeed!

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 - if this light flashes, the aircraft has been put into a dangerous or illogical configuration

1. Throttle above 20% with spoilers extended
2. Gear down above 270 KIAS
3. Flaps down above 230 KIAS
4. Flaps less than 40 in a descent at less than 160 KIAS
5. Flaps 40 or greater with gear up
6. 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

|  |  | 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.

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