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PROBLEMS/FAQ'S

 

WARNINGS



RADIO ALTIMETER 2500 FOOT WARNING



Descending throught 2500 feet, you will get a DH (Decision Height) light on the radio altimeter and the ADI.  Push the DH light to cancel the warning.  You will then get another DH warning when descending through the selected radio altitude. 

 

GROUND PROXIMITY WARNING SYSTEM (GPWS) AND WIND SHEAR



This panel provides the same basic GPWS found in the aircraft. It protects against excessive descent, terrain closure, flying too low of an approach, or trying to land with the gear not down. 

In the case of excessive descent or terrain closure, you'll get a flashing red light and aural "pull up" warning. Note that aural altitude callouts do NOT belong with this particular model GPWS.

On ILS approaches, the below glideslope warning arms itself. If you're too low on the glideslope, you'll get a steady amber light and aural "below glideslope" warning. If on a visual approach and flying the VASI, you can cancel the warning by pushing the glideslope light.

The GPWS system is tested by pressing and holding the red light. It will go through its built in test and you should hear "below glideslope" once, "pull up" four times, and "wind shear" three times before the test is complete.



TAKEOFF CONFIGURATION

You'll get a takeoff warning (intermittent horn) when your flaps aren't set between 5 and 25 degrees, your speed brake is deployed, or your stab trim is not within the green takeoff band. A takeoff warning cannot be reset; the horn will stop only when the configuration is corrected.



FLIGHT CONFIGURATION

You'll get a continuous warning horn if your speed brake is deployed with flaps extended or if your flaps are in landing configuration with the gear up. As in the takeoff configuration, this must be corrected before the horn will shut off. You'll also get a continuous horn if you extend you flaps at idle power with the gear up (gear lights red). This can be reset by pulling on the horn cutout lever pictured above that is located on the second radio stack panel.



COMPARATOR



The comparator light is to warn of differences between the captain's and first officer's instruments. It also serves to warn that the captain and FO have different ILS frequencies tuned in when on final approach. Since there's no FO's instruments in this panel, the comparator light only works for ILS frequencies.

You'll get a comparator light if 1) the Captain has an ILS frequency tuned in, and 2) the FO's frequency does not match.



ALTITUDE ALERTING



This is NOT the autopilot altitude hold. All this device does is set the altitude for the c-chord chime and warning light. You'll get the alert when climbing or descending within 900 feet of the set altitude. You'll also get an alert when straying more than 300 feet off the set altitude. 

Altitude alerting is inhibited when in landing configuration, flaps greater than 25 degrees, and you'll see the red "off" flag.



TESTING THE FIRE DETECTION SYSTEM



Holding the fire test switch, pictured above at the lower right, will heat the engine or firewall detectors in order to test the continuity and functioning of the system. The switch is held in the left or right position until all the handles light up. Holding the switch to the right also checks the wheel well detector loops.

Due to the fact that you can't click in two mouse areas at once, there is no bell cutout. You'll have to listen to the bell until the test is completed.



LOW OIL PRESSURE LIGHTS



Self explanatory.



ENGINE FAIL LIGHT



This light does not necessarily mean your engine has stopped. This light comes on with Auto Pack Trip after a sudden loss of engine bleed pressure. On this panel, you will only see this light come on with aborted take offs.  Push the light to cancel the warning.



LOW FUEL WARNING



When you start dipping into your 45 minute reserves (6750 pounds), the fuel icon will flash.



LEADING EDGE DEVICES LIGHTS



These two lights, one amber and one green, tell the status of the leading edge devices, or LED's. Green means they are extended in their normal position, and amber means they are in transit. You should get an amber light between flap settings Up and 2, and 2 and 5. With setting 5 and above, they should be green. Notice that you get an amber light with the flaps fully retracted and the engines shut off. This is due to slat droop, where the slats droop slightly due to gravity and lack of hydraulic pressure to bring them back into the wing.