What is the maximum altitude loss allowed during an integrity check of an unpressurized aircraft static pressure system?

The maximum altitude loss allowed during an integrity check of an unpressurized aircraft static pressure system is 100 feet in one minute. This specific standard is in place to ensure that the static pressure system is functioning correctly and maintains the accuracy necessary for safe flight operations.

During the integrity check, the aircraft’s ability to maintain a stable static pressure reading is critical for providing accurate altimetry and other flight data. An allowable altitude loss of 100 feet indicates that the system can withstand minor fluctuations without failing. Exceeding this limit could imply that there is an issue with the static pressure system, potentially leading to erroneous altitude readings and jeopardizing safe flight operations.

Understanding these integrity checks is essential for pilots and maintenance personnel, as they ensure the aircraft's systems are reliable and function correctly under various operating conditions.