Automatic pressure altitude reporting system
For Automatic pressure altitude reporting system, interval is Within the preceding 24 calendar months; applies to is airplane, or helicopter, in controlled airspace under IFR; consequence if lapsed is No person may operate an airplane, or helicopter, in controlled airspace under IFR; regulation section is § 91.411, verified against its source on 2026-08-06.
- Inspection or test item
- Automatic pressure altitude reporting system verified
- Interval
- Within the preceding 24 calendar months verified
- Applies to
- airplane, or helicopter, in controlled airspace under IFR verified
- Consequence if lapsed
- No person may operate an airplane, or helicopter, in controlled airspace under IFR verified
- Regulation section
- § 91.411 verified
What the source says
No person may operate an airplane, or helicopter, in controlled airspace under IFR unless— (1) Within the preceding 24 calendar months, each static pressure system, each altimeter instrument, and each automatic pressure altitude reporting system has been tested and inspected and found to comply with appendices E and F of part 43 of this chapter;
— ecfr.gov, retrieved 2026-08-06
Source
- ecfr.govhttps://www.ecfr.gov/api/versioner/v1/full/2026-08-01/title-14.xml?part=91§ion=91.411