FAA Aviation Mechanic Airframe (AMA)Airframe InspectionMedium
A pilot asks a technician why the aircraft's pitot-static system and altimeter were tested even though there had been no reported malfunctions. Under 14 CFR 91.411, this test is required at what interval for aircraft operated under IFR?
- AEvery 100 flight hours
- BOnly when the altimeter reads incorrectly
- CEvery 24 calendar months
- DEvery 12 calendar months
Show answer & explanationAnswer & explanation
Correct answer: C. Every 24 calendar months
14 CFR 91.411 requires the static pressure system, altimeter, and automatic pressure altitude reporting equipment to be tested and inspected every 24 calendar months for IFR flight, in accordance with Part 43 Appendix E.
Why the other options are wrong
- A. 100 flight hours corresponds to the 100-hour inspection requirement, unrelated
- B. The test is mandatory on a schedule, not only after a reported malfunction
- D. 12 calendar months is the annual inspection interval, not the pitot-static test
Pitot-Static/Altimeter Test (91.411)
A required test of the static pressure system, altimeter, and automatic altitude reporting equipment every 24 calendar months for IFR operations, per Part 43 Appendix E.
- Applies to aircraft operated under IFR in controlled airspace
- Interval is 24 calendar months, same as transponder test under 91.413
- Test must be performed by an appropriately certificated repair station or the manufacturer
Memory trick: Altimeter and transponder are 24-month twins