The Federal Aviation Administration (FAA) has issued a final rule that updates an existing Airworthiness Directive (AD) regarding certain Boeing airplanes. This AD addresses problems with the multi-mode receivers (MMRs) used for GPS navigation, particularly related to an error in calculating Coordinated Universal Time (UTC), which could lead to flight safety issues like simultaneous resets or loss of GPS accuracy. To fix this, the updated rule requires airlines to install new operational software on affected airplanes and clarifies which planes and systems are subject to these changes. The rule also incorporates feedback from various airlines and aviation organizations to ensure the directives are clear and accurate.
Simple Explanation
The airplane helpers (called MMRs) were getting confused about what time it was, which could make airplane trips bumpy or not safe. So, the airplane checkers said they need to update the software in some Boeing airplanes to make sure everything runs smoothly and safely.