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Cabin Fumes from Non-Fire Sources

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Non Combustion-related Fumes


Article Information
Category: Fire Smoke and Fumes Fire Smoke and Fumes
Content source: SKYbrary About SKYbrary
Content control: SKYbrary About SKYbrary

Description

Fumes from various non-fire related sources may sometimes be experienced within the cabins of passenger aircraft.

Sources

Most modern passenger aircraft are equipped with pressurised, climate controlled, cabins. In spite of the aircraft designers’ intentions, unwanted fumes frequently permeate the interior of the aircraft. Open doors and hatches as well as certain on-board sources can introduce fumes to the cabin environment. However the usual path of entry for fumes is via the aircraft pressurisation and air conditioning systems.

The majority of passenger aircraft utilise bleed air from the engine or Auxiliary Power Unit to pressurize and heat or cool the aircraft cabin. As a consequence, any contaminants introduced into the engine/APU compressor prior to the point from which the bleed air is extracted may result in the appearance of corresponding fumes in the passenger cabin and flight deck.

Accidents and Incidents

Cabin air contamination

  • A332, vicinity Perth Australia, 2014 (On 9 June 2014, a 'burning odour' of undetermined origin became evident in the rear galley of an Airbus A330 as soon as the aircraft powered up for take off. Initially, it was dismissed as not uncommon and likely to soon dissipate, but it continued and affected cabin crew were unable to continue their normal duties and received oxygen to assist recovery. En route diversion was considered but flight completion chosen. It was found that the rear pressure bulkhead insulation had not been correctly refitted following maintenance and had collapsed into and came into contact with APU bleed air duct.)
  • B763, Frankfurt Germany, 2007 (On 20 August 2007, at Frankfurt, while a Boeing 767-300 was taxiing to its parking position, thick smoke developed in the passenger cabin. All passengers and the crew were able to leave the aircraft at the gate without further incident.)
  • L101, vicinity Riyadh Saudi Arabia, 1980 (On 19 August 1980, a Lockheed L1011 operated by Saudi Arabian Airlines took off from Riyadh, Saudi Arabia - seven minutes later an aural warning indicated a smoke in the aft cargo compartment. Despite the successful landing all 301 persons on board perished due toxic fumes inhalation and uncontrolled fire.)
  • A333, London Heathrow UK, 2016 (On 26 June 2016, thick white smoke suddenly appeared in the cabin of a fully loaded Airbus A330-300 prior to engine start with the door used for boarding still connected to the air bridge. An emergency evacuation initiated by cabin crew was accomplished without injury although amidst some confusion due to a brief conflict between flight crew and cabin crew instructions. The Investigation found that the smoke had been caused when an APU seal failed and hot oil entered the bleed air supply and pyrolysed. Safety Recommendations in respect of both crew communication and procedures and APU auto-shutdown were made.)
  • B732, Manchester UK, 1985 (On 22nd August 1985, a B737-200 being operated by British Airtours, a wholly-owned subsidiary of British Airways, suffered an uncontained engine failure, with consequent damage from ejected debris enabling the initiation of a fuel-fed fire which spread to the fuselage during the rejected take off and continued to be fuel-fed after the aircraft stopped, leading to rapid destruction of the aircraft before many of the occupants had evacuated.)

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Further Reading