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

AM.II.H.R4

Risk management

Handling of mechanical gyros or instruments containing mechanical gyros.

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. 10-76
Chapter 10: Aircraft Systems › Instrument Housings & Handling
analog mechanical instruments, should be handled with special care and should never be dropped. A crack in an airtight instrument case renders it unairworthy. Ports should never be blown into and should be plugged until the instrument is installed ... Cage all gyro instruments until mounted in the instrument panel. Observe all cautions written on the instrument housing and follow the manufacturer’s instruction for proper handling and shipping, as well as installation. Figure 10-132. A typical aircraft…
Airplane Flying Handbook p. 2-4
Chapter 2: Ground Operations › Preflight Assessment of the Aircraft › Visual Preflight Assessment
takeoff position. ⦁ Mechanical air-driven gyro instruments should be inspected for signs of hazing on the instrument face, which may indicate leaks. ⦁ Avionics master is OFF. ⦁ Circuit breakers checked IN. ⦁ Confirm that the landing gear handle…
Airplane Flying Handbook p. 2-20
Chapter 2: Ground Operations › Taxiing
checklist items, taxiing still provides an opportunity to verify the operation and cross-check of the flight instruments. In general, the flight instruments should indicate properly with the airspeed at or near zero (depending on taxi speed, wind speed ... directional gyro should be set and crossed checked to the magnetic compass and verified accurate to the direction of taxi; and the vertical speed indicator (VSI) should read zero. These checks can be accomplished on conventional mechanical instrumented…