AD/PA-31/52 - Replacement of Radio Power Relay Cover Spacer Bushings - CANCELLED

What this was: An aviation safety directive requiring owners of Piper PA-31 aircraft (twin-engine planes) to replace worn spacer bushings in the radio power relay cover — a small component ensuring the radio electrical system works properly.

Who it affected: Anyone operating Piper PA-31 series aeroplanes in Australia.

What had to happen: The bushings had to be replaced once, following the manufacturer's instructions (Piper Service Bulletin No. 535), within 10 hours of flying time after January 1977.

Current status: Cancelled. This directive was cancelled on 31 July 2008 because every affected aircraft had already been modified. It no longer imposes any legal obligations but remains part of maintenance history records.