AD/DHC-3/28 - Front Fuselage - Windshield Post - CANCELLED

What this does: This document officially cancels (revokes) an older aviation safety rule that required specific structural inspections on a particular type of aircraft.

Who it affects: Owners and operators of De Havilland Canada DHC-3 (Otter) series aeroplanes.

The backstory: In 1977, authorities issued a safety directive requiring inspection and repair of the windshield post (the structural frame around the cockpit windows) on these aircraft. Operators had to complete this work within 100 hours of flying time after June 1977.

Why it matters now: Since more than 30 years have passed since the original deadline, every affected aircraft has already been inspected and repaired. This cancellation removes an outdated compliance burden that is no longer necessary, reducing administrative requirements for aircraft operators while maintaining safety (since the work was already done decades ago).