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

AM.II.H.R1

Risk management

Use of pressurized air and water during maintenance or cleaning of aircraft instrument systems.

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 › Vacuum System Maintenance
resulting in excessive precession and failure of the instruments to maintain accurate indication. The aircraft technician is responsible for the prevention or correction of vacuum system malfunctions. Usually this consists of cleaning or replacing filters, checking and correcting insufficient vacuum…
Aviation Maintenance Technician Handbook - Airframe p. 10-83
Chapter 10: Aircraft Systems › Maintenance of Instruments & Instrument Systems › Autopilot System Maintenance
Autopilot System Maintenance The information in this section does not apply to…
Aviation Maintenance Technician Handbook - Airframe p. 10-81
Chapter 10: Aircraft Systems › Maintenance of Instruments & Instrument Systems › Pitot-Static System Maintenance & Tests
part 91, section 91.411, requires this test, as well as tests on the pitot-static system and on the automatic pressure altitude reporting system. The certified airframe or A&P mechanic is not qualified to perform the altimeter inspections. They ... Pitot-Static System Maintenance & Tests Water trapped in a pitot static system may cause inaccurate or intermittent indications on the pitot-static flight instruments. This is especially a problem if the water freezes in flight. Many systems are fitted with…