Aviation Mechanic - General, Airframe, and Powerplant › II. Airframe › Task H. Aircraft Instrument Systems

AM.II.H.K2

Knowledge

Magnetic compass inspection and operation.

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Aviation Maintenance Technician Handbook - Airframe p. 10-83
Chapter 10: Aircraft Systems › Maintenance of Instruments & Instrument Systems › Autopilot System Maintenance
information that relates to all autopilot systems. Maintenance of an autopilot system consists of visual inspection, replacement of components, cleaning, lubrication, and an operational checkout of the system. Consult the manufacturer’s maintenance manual for all of these procedures. With ... correctly aligned and smooth in operation. When applicable, the operating cables should be checked for tension. An operational check is important to assure that every circuit is functioning properly. An autopilot operational check should be performed on new installations, after…
Aviation Maintenance Technician Handbook - Airframe p. 10-83
Chapter 10: Aircraft Systems › Maintenance of Instruments & Instrument Systems › Vacuum System Maintenance
should be replaced if further inspection reveals that there is no other reasons for this deviation. Align the aircraft with the radials every 30° around the compass rose and record each indication on the compass compensation card. Date and sign ... pilot near the compass in the flight deck. Vacuum System Maintenance Errors in the indication presented on a vacuum gyroscopic instrument could be the result of any factor that prevents the vacuum system from operating within the design suction limits…
Aviation Maintenance Technician Handbook - Airframe p. 10-82
Chapter 10: Aircraft Systems › Maintenance of Instruments & Instrument Systems › Magnetic Compass Maintenance & Compensation
usually included in an inspection: 1. The compass indicator should be checked for correct readings on various cardinal headings and re-compensated if necessary. 2. Moving parts of the compass should work easily. 3. The compass bowl should be correctly ... compass bowl should be filled with liquid. The liquid should not contain any bubbles or have any discoloration. Airframe mechanics cannot refill the fluid of a whiskey compass. 5. The scale should be readable and be well lit. Compass magnetic…