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34 Cards in this Set
- Front
- Back
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What error is corrected when an aircraft compass is swung? |
Deviation error.
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What fluid is used in an aircraft magnetic compass?
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A special water–clear fluid similar to kerosine.
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What is the maximum amount of deviation error allowed when a magnetic compass is installed in an aircraft?
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10 degrees.
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Where on an airport is a compass rose located?
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At a location where there is little traffic and the area is free from magnetic interference caused by electrical power lines or buried pipes.
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What is done to a compass to correct for deviation error?
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The compensating magnets in the compass are adjusted to minimize the effect of outside magnetic fields.
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Where should the compass correction card be placed?
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In plain sight of the pilot, near the compass.
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What are the gyroscopic instruments that are connected to the low–pressure pneumatic system of an aircraft?
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Heading indicator, attitude indicator, and turn–and–slip indicator.
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What device is used with a wet–pump vacuum system to prevent oil from getting into the deicer boots?
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An oil separator.
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What are two types of filters used with a pressure system for gyros?
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A pump inlet filter and an inline filter.
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What type of filter is used with a vacuum system for gyros?
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A central air filter.
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What two types of pumps are used in the low–pressure pneumatic system?
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A dry–type and a wet–type air pump.
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What are the vanes of a wet–type air pump made of?
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Steel.
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What are the vanes of a dry–type air pump made of?
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Carbon.
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How are the vanes of a wet–type air pump lubricated?
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With engine oil directed into the pump through a small hole in the base of the pump.
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Why is it important to use the correct gasket when replacing a wet–type air pump?
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The gasket must have a hold through which the pump lubricating oil can flow.
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Why do dry–type air pumps not need to be lubricated?
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The special carbon material of which the vanes are made wears away in microscopic amounts to provide the needed lubrication.
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What must be done to the gyro pressure system if a dry–type air pump fails?
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All of the filters must be replaced to prevent any debris from the pump vanes getting into the gyro instruments.
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Who is authorized to perform the altimeter tests to determine the accuracy of the altimeter?
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The manufacturer of the aircraft on which the tests are conducted, or a certificated repair station properly equipped and authorized to perform the test.
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Where are the requirements for the altimeter system tests found?
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14 CFR Part 43, Appendix E.
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How often should an altimeter be checked if it is installed in an aircraft used in IFR flight?
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Every 24 calendar months.
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What are 6 tests that must be made when testing an altimeter?
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Scale error, hysteresis, after–effect, friction, case leak, and barometric scale error.
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How much difference is allowed between the altitude indication on the automatic pressure altitude reporting equipment and that on the altimeter?
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125 feet.
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To what altitude must altimeters be tested?
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To the highest altitude the aircraft will be flown on IFR flight.
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What record must be made of a test of an altimeter?
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The aircraft permanent maintenance record must show the date, the maximum altitude to which the altimeter was tested, and the name of the person approving the aircraft for return to service after the test.
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Do the tests described in the 14 CFR Part 43, Appendix E apply to the altimeters installed in all certificated aircraft?
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No, only those operated under instrument flight rules in controlled airspace.
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To what avionic equipment is the output from encoding altimeter connected?
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The ATC transponder.
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What is the allowable difference between the surveyed elevation of the airport and the indication on the altimeter when it is set to the local altimeter setting?
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75 feet.
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What instruments in an aircraft are connected to the static system?
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The airspeed indicator, vertical speed indicator, and altimeter.
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Who is authorized to conduct a static system tests specified in 14 CFR §91.411?
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A certificated mechanic holding an airframe rating.
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How much leakage is allowed in the static system of an unpressurized aircraft?
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With a pressure differential of 1 inch of mercury, the system must not show a loss indicated altitude of more than 100 feet in one minute.
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How much leakage is allowed in the static system of a pressurized aircraft?
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With a pressure differential equal to the maximum cabin differential pressure for which the aircraft is certificated, the system must not show a loss of indicated altitude of more than 2 percent of the equivalent altitude of the maximum cabin differential pressure or 100 feet, whichever is the greater, in one minute.
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What indication on the altimeter shows that the pressure inside the static system has been decreased by 1 inch of mercury?
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The altimeter will show an increase of approximately 1,000 feet.
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When should a static system leak check be performed?
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Any time the static system has been opened.
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What should be done to the static port that is no being used to conduct the leak test?
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It should be taped over in such a way that the tape can not be overlooked or forgotten when the test is completed. |
