Alert 09 – 14 Helicopter Operations – Ground Resonance Phenomena


A helicopter on a routine crew change flight to a MODU landed on the helideck. The pilot and the HLO (Helicopter Landing Officer) gave each other the “thumbs up” signal indicating that it was safe for the HLO and his crew to carry on with their duties.
The HLO & his two Helideck Assistants (HA) approached the chopper The HLO exchanged manifests with the pilot passing it through the cockpit door window, the HLO then opened the forward main passenger door and passed the pilot some food for the return trip. At this time the HAs were unloading the luggage from the helicopter side locker which is located on the starboard aft side of the aircraft.

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