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Non Revenue Flights

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Category: General General
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Definition

Flights which are conducted for non revenue purposes such as:

Description

Non Revenue Flights have often been identified as attracting a greater risk of an accident or serious incident than the revenue flights which form the main business of any operator of commercial aircraft. In many respects, the causes of increased risk for this type of flight are similar to those which have been associated with a slightly wider sub group of flights - Non Standard Flights.


Accident & Incident Reports

A selection of accidents and events which have occurred on non-revenue flights:

  • A139 / A30B, Ottawa Canada, 2014 (On 5 June 2014, an AW139 about to depart from its Ottawa home base on a positioning flight exceeded its clearance limit and began to hover taxi towards the main runway as an A300 was about to touch down on it. The TWR controller immediately instructed the helicopter to stop which it did, just clear of the runway. The A300 reached taxi speed just prior to the intersection. The Investigation attributed the error to a combination of distraction and expectancy and noted that the AW139 pilot had not checked actual or imminent runway occupancy prior to passing his clearance limit.)
  • A320, vicinity Dublin Ireland, 2015 (On 3 October 2015, an Airbus A320 which had just taken off from Dublin experienced fumes from the air conditioning system in both flight deck and cabin. A 'PAN' was declared and the aircraft returned with both pilots making precautionary use of their oxygen masks. The Investigation found that routine engine pressure washes carried out prior to departure have been incorrectly performed and a contaminant was introduced into the bleed air supply to the air conditioning system as a result. The context for the error was found to be the absence of any engine wash procedure training for the Operator's engineers.)
  • A320, vicinity Perpignan France, 2008 (On 27 November 2008, the crew of an XL Airways A320 on an airworthiness function flight following aircraft repainting lost control of the aircraft after fail to take the action necessary to recover from a full stall which had resulted from their continued airspeed reduction during a low speed handling test when Stall Protection System (SPS) activation did nor occur at the likely airspeed because two of the three angle of attack sensors were blocked by ice formed by water ingress during preparation for the repainting. This condition rendered angle of attack protection in normal law inoperative.)
  • A343 / RJ1H, Copenhagen Denmark, 2016 (On 26 December 2016, the wing of an Airbus A340-300 being repositioned by towing at Copenhagen as cleared hit an Avro RJ100 which had stopped short of its stand when taxiing due to the absence of the expected ground crew. The RJ100 had been there for twelve minutes at the time of the collision. The Investigation attributed the collision to differing expectations of the tug driver, the Apron controller and the RJ100 flight crew within an overall context of complacency on the part of the tug driver whilst carrying out what would have been regarded as a routine, non-stressful task.)
  • AS32 / B734, Aberdeen UK, 2000 (For reasons that were not established, a Super Puma helicopter being air tested and in the hover at about 30 feet agl near the active runway at Aberdeen assumed that the departure clearance given by GND was a take off clearance and moved into the hover over the opposite end of the runway at the same time as a Boeing 737 was taking off. The 737 saw the helicopter ahead and made a high speed rejected take off, stopping approximately 100 metres before reaching the position of the helicopter which had by then moved off the runway still hovering.)
  • … further results


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