14 CFR § 27,1327 – Magnetic direction indicator,

b A magnetic nonstabilized direction indicator may deviate more than 10 degrees due to the operation of electrically powered systems such as electrically heated windshields if either a magnetic stabilized direction indicator, which does not have a deviation in level flight greater than 10 degrees on any heading, or a gyroscopic direction indicator, is installed,

Aircraft Direction Indicating Instruments

A gyroscopic direction indicator is augmented by magnetic direction information from a remotely located compass, The type of compass used is called a flux valve or flux gate compass, It consists of a very magnetically permeable circular segmented core frame or spider, The earth’s magnetic field flows through this iron core and varies its distribution through segments of the core as the flux

Magnetic Direction Indicator Compass Deviation Card / EFIS

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Magnetic Direction Indicators must be calibrated before the issue of the Special Certificate of Airworthiness, Each calibration reading must be in terms of magnetic headings in not more than 30° increments, The results of the calibration must be written in the journey log book and a compass deviation card must be installed on the instrument panel as close as possible from the Magnetic

Flight Instruments: The Heading Indicator and Magnetic

The magnetic compass is the primary indicator of direction in most airplanes, It is, however, difficult to read in turbulence and subject to acceleration and turning errors, making it a difficult instrument to fly by accurately, The heading indicator HI is a gyroscopic instrument that you should keep aligned with the magnetic compass in flight, Although it takes its directional reference

Federal Aviation Regulation Sec, 23,1327

Sec, 23,1327 — Magnetic direction indicator, a Except as provided in paragraph b of this section— 1 Each magnetic direction indicator must be installed so that its accuracy is not excessively affected by the airplane’s vibration or magnetic fields; and 2 The compensated installation may not have a deviation in level flight, greater than ten degrees on any heading, b A magnetic

Magnetic-Field Indicators

These indicators come with a calibration certificate traceable to NIST that states they’ve passed a test for accuracy, All are calibrated at 72° F, In addition to measuring the strength of a magnetic field in gauss, they also measure the direction of a magnetic field in positive/negative, To take a measurement, place the lower edge of the indicator near or against your tools and parts,

5 Acceptable Methods for Calibrating an Aircraft Magnetic

A Magnetic Direction Indicator is among the must have instruments in aviation,Lean the 5 acceptable methods for calibrating an aircraft magnetic compass,

faa regulations

The phrase “magnetic direction indictor” is interpreted as “magnetic direction-indicator“, not “magnetic-direction indicator“, You need a device based on magnetism that indicates your direction, That could be a floating-card type compass, or a fluxgate compass, for example, Some interpretation of this phrase is given in AC 23,1311-1C section 8,8:

Compass Swing Requirements

Magnetic direction indicator, a Except as provided in paragraph b of this section–1 Each magnetic direction indicator must be installed so that its accuracy is not excessively affected by the airplane’s vibration or magnetic fields; and 2 The compensated installation may not have a deviation, in level flight, greater than ten degrees on any heading, b A magnetic nonstabilized

Magnetic Compass

Check the alignment of the direction indicator to comparing to the magnetic compass indicator once electrical power is applied and the gyros have had a chance to spin up Compass Swing: A compass swing must be performed whenever any ferrous component of the system i,e, flux valve compensator, or Standby Compass is installed, removed, repaired, or a new compass is installed

AC 43-215

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The magnetic direction indicator compass is a required instrument under 14 CFR part 91 for VFR/instrument flight rules IFR operations; therefore, the operator is not allowed to take off with that instrument in an inoperable condition, 8 SITE PREPARATION, Unless otherwise directed by the manufacturer, before calibrating an aircraft compass, evaluate the calibration site and immediate area

Federal Aviation Regulation Sec, 23,1547

d Each calibration reading must be in terms of magnetic headings in not more than 30 degree increments, e If a magnetic nonstabilized direction indicator can have a deviation of more than 10 degrees caused by the operation of electrical equipment, the placard must state which electrical loads, or combination of loads, would cause a deviation of more than 10 degrees when turned on,

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