Incident Description
An equipment loader attempted to activate the entry door of an airplane with a pressurized cabin. The attempt occurred before the airplane's rotating beacon was turned off. As the cabin was being depressurized, the door opened, and the equipment loader was knocked off the loader.
Company Ramp Safety Policy
Company ramp safety policy stated that personnel should not approach an arriving aircraft until it had come to a complete stop at its parking position, the engines had been shut down, the wheels chocked, and the red rotating beacons turned off.
Investigation Findings
Investigation revealed that the aircraft had a malfunction of the pressurization outflow valve while conducting engine shutdown procedures on the parking ramp.