Fuel starvation and fuel exhaustion

British Airways Flight 38 crash-landed at London Heathrow in 2008 after its engines’ fuel/oil heat exchangers became clogged with ice crystals.

In an internal combustion engine, fuel starvation is the failure of the fuel system to supply sufficient fuel to allow the engine to run properly, for example due to blockage, vapor lock, contamination by water, malfunction of the fuel pump or incorrect operation, leading to loss of power or engine stoppage. There is still fuel in the tank(s), but it is not delivered to the engine(s) in sufficient quantity. By contrast, fuel exhaustion (also called fuel depletion) is an occurrence in which the vehicle in question becomes completely devoid of usable fuel, with results similar to those of fuel starvation.

All modes of transport powered by internal combustion engines can be affected by fuel starvation, although the problem is most serious for aircraft in flight. Watercraft are also at risk, as a drifting vessel cannot maneuver to avoid a collision or prevent itself from running aground. On aircraft, fuel starvation is often the result of incorrect fuel management, for example by selecting to feed the engine from an empty tank while fuel is present in another one.

When the fuel level is low, some aircraft are vulnerable to a specific type of fuel starvation known as unporting, which occurs when hard maneuvers, a steep climb, or a departure from coordinated flight causes the fuel to slosh away from the line leading to an engine. Some aircraft have special operating limitations on steep climbs with low fuel due to this concern.

Aircraft with fuel tank filler caps on the surface of the wings or fuselage are also susceptible to fuel exhaustion if a filler cap is left off or not refitted correctly after removal. On an aircraft in flight, the airflow over the wing or fuselage leads to air pressure outside the fuel tank being lower than inside; as a result fuel can be sucked out of the tank. In addition to improper fitment, lack of maintenance of an aircraft fuel tank filler cap is also an issue. A defective seal on a cap may allow water into the tank when an aircraft is washed or parked outdoors in wet weather, leading to fuel starvation.

Fuel emergency procedures in aviation

Aircraft operators and aviation regulatory authorities have developed various procedures that should be used during a fuel exhaustion situation in flight so that the aircraft maximizes its chances of completing a safe and successful landing.

During flight, if the pilot of their aircraft determines that they are able to follow cleared instructions and successfully complete an approach and landing, but that any further undue delay may result in the aircraft encountering a fuel emergency or landing with less than their calculated final reserve fuel, the pilot shall inform air traffic control by declaring MINIMUM FUEL. This will inform ATC that any further delay might place the aircraft in a fuel emergency situation, however this is only an advisory declaration and gives ATC no obligation or requirements to prioritize that aircraft for an expedited approach or immediate landing.

If during flight, the pilot of their aircraft calculates that they will be landing with less than their final reserve fuel, or that they will encounter a fuel emergency situation, they must inform ATC by declaring MAYDAY MAYDAY MAYDAY, FUEL. As with any other mayday call in aviation, this will be treated as a full emergency and the pilots will be provided all available aid to execute a safe and successful landing. This may include immediate prioritization above all other aircraft traffic, permission to land on any usable runway and preparation of airport emergency services at the airfield.

Fuel exhaustion and starvation incidents on aircraft

Many incidents have happened on aircraft where fuel exhaustion or starvation played a role. A partial list of these incidents follows:

1940s

The forward fuselage section of Lady Be Good, a Consolidated B-24 Liberator which crashed in the Libyan Desert after running out of fuel

1950s and 1960s

1970s and 1980s

1990s and 2000s

2010 and later

Abandoned in-flight aircraft

A number of aircraft have been abandoned by their crew (both intentionally and sometimes accidentally) when the aircraft has continued on its own until fuel exhaustion caused it to crash:

See also

References

  1. ↑ "fuel starvation Definition and Meaning". Dictionary Central. Archived from the original on 2 March 2018. Retrieved 6 June 2017.
  2. 1 2 "Fuel Starvation/Fuel Exhaustion" (PDF). www.iaa.ie. Irish Aviation Authority. 13 November 2013. Archived from the original (PDF) on 10 February 2025. Retrieved 21 February 2026.
  3. ↑ "Australian Aviation Accidents Involving Fuel Exhaustion and Starvation" (PDF). Australian Transport Safety Bureau: 1. December 2002. Archived from the original (PDF) on 23 November 2018. Retrieved 6 June 2017.
  4. ↑ "Fuel Starvation". Fuel for Thought. Civil Aviation Authority of New Zealand. Archived from the original on 20 December 2018. Retrieved 6 June 2017.
  5. ↑ Namowitz, Dan (27 December 2013). "Training Tip: "Unported" Fuel". aopa.org. Aircraft Owners and Pilots Association. Retrieved 3 July 2024.
  6. ↑ "Fuel management, unsecured cap risk highlighted in Aero Commander forced landing". www.atsb.gov.au. Australian Transport Safety Bureau. 19 November 2024. Archived from the original on 10 June 2025. Retrieved 21 February 2026.
  7. ↑ "Advisory Circular 20-125: WATER IN AVIATION FUELS" (PDF). www.faa.gov. Federal Aviation Administration. 10 December 1985. Archived from the original (PDF) on 22 December 2014. Retrieved 21 February 2026.
  8. ↑ "ADVISORY CIRCULAR AC 91-25 v1.2: Fuel and oil safety" (PDF). www.casa.gov.au. Civil Aviation Safety Authority. May 2025. Archived from the original (PDF) on 8 November 2025. Retrieved 21 February 2026.
  9. 1 2 3 "Fuel - Regulations". skybrary.aero. 17 June 2026.
  10. ↑ ""Lady Be Good"". National Museum of the United States Air Force™. Retrieved 16 April 2024.
  11. ↑ Aviation Safety Network HB-IRW page Retrieved: 6 December 2007.
  12. ↑ Aviation Safety Network F-BGNA page Retrieved: 12 December 2007.
  13. ↑ Aviation Safety Network CCCP-45021 page Retrieved: 12 December 2007.
  14. ↑ "Royal Dutch Air Force (Koninklijke Luchtmacht) D-8045". International F-104 Society. Archived from the original on 5 June 2010. Retrieved 18 December 2010.
  15. ↑ Aviation Safety Network G-ALHG page Retrieved: 6 December 2007.
  16. ↑ "Report on the NTSB investigation of the crash of N935F" (PDF). Archived from the original (PDF) on 5 March 2007. Retrieved 12 December 2007.
  17. ↑ "NTSB Identification: IAD76AI021". National Transportation Safety Board. Retrieved 12 January 2024.
  18. ↑ Hassell, Owen (23 April 2023). "WATCH: Wrestling icon Ric Flair recounts Wilmington plane crash on Joe Rogan podcast". Star-News. Wilmington, North Carolina. Retrieved 12 January 2024.
  19. ↑ "PHOTOS: Ric Flair, Wilmington and the plane crash". Star-News. Wilmington, North Carolina. 25 February 2023. Retrieved 12 January 2024.
  20. ↑ Pat Adams; Jaquelyn Cooper (20 October 2017). "The Tragic Plane Crash that Happened on October 20, 1977 in Gillsburg Mississippi". TennesseeConcerts.com. Archived from the original on 25 December 2014. Retrieved 25 November 2017.
  21. ↑ "Aircraft accident Convair CV-240 N55VM Gillsburg, MS". Aviation Safety Network. 19 June 1978. Retrieved 26 October 2019.
  22. ↑ Gwinn, John (22 October 1977). "Why did plane run out of fuel?". Spartanburg Herald-Journal. South Carolina. p. B1.
  23. ↑ "Rock band leader, five others killed in charter plane crash". Eugene Register-Guard. Oregon. UPI. 21 October 1977. p. 3A.
  24. ↑ Aviation Safety Network N8082U page Retrieved: 6 December 2007.
  25. ↑ Aviation Safety Network C-GAUN page Archived 28 January 2012 at the Wayback Machine Retrieved: 6 December 2007.
  26. ↑ Aviation Safety Network N551CC page Retrieved: 12 December 2007.
  27. ↑ Aviation Safety Network PP-VMK page Retrieved: 14 December 2007.
  28. ↑ Aviation Safety Network HK-2016 page Retrieved: 6 December 2007.
  29. ↑ Wilson, Stewart. Phantom, Hornet and Skyhawk in Australian Service. Weston Creek ACT, Australia: Aerospace Publications Pty. Ltd., 1993. ISBN 1-875671-03-X.
  30. ↑ ADF Serials F/A-18 page Archived 18 October 2006 at the Wayback Machine Retrieved: 12 December 2007.
  31. ↑ Aviation Safety Network VT-EDV page Retrieved: 12 December 2007.
  32. ↑ Aviation Safety Network ET-AIZ page Retrieved: 6 December 2007.
  33. ↑ Aviation Safety Network D-AHLB page Retrieved: 6 December 2007.
  34. ↑ Aviation Safety Network C-GITS page Retrieved: 6 December 2007.
  35. ↑ Aviation Safety Network PT-MQH page Retrieved: 6 December 2007.
  36. ↑ Aviation Safety Network N586P page Retrieved: 6 December 2007.
  37. ↑ Aviation Safety Network TS-LBB page Retrieved: 12 December 2007.
  38. ↑ Aviation Safety Network 5B-DBY page Retrieved: 6 December 2007.
  39. ↑ "Accident Description". Aviation Safety Network. Archived from the original on 15 June 2018. Retrieved 6 July 2019.
  40. ↑ AAIB Bulletin S1/2008 SPECIAL Retrieved: 2 October 2012.
  41. ↑ Ostrower, Jon (30 November 2016). "Colombia plane crash: Jet ran out of fuel, pilot said". CNN. Retrieved 29 June 2018.
  42. ↑ Preliminary Report Accident involving Air India's B787-8 aircraft bearing registration VT-ANB at Ahmedabad on 12 June 2025 (PDF). Aircraft Accident Investigation Bureau (Report). 11 July 2025. Archived (PDF) from the original on 11 July 2025. Retrieved 11 July 2025.
  43. ↑ "Victims' families demand answers as report says fuel switches cut off before Air India crash". BBC News. Retrieved 11 July 2025.
  44. ↑ "Story of the discovery of the "Lady Be Good" and the recovery of the crew's remains". Archived from the original on 25 February 2010. Retrieved 6 December 2007.
  45. ↑ "Lady Be Good". National Museum of the United States Air Force. When the aircraft was found three of the four propellers were feathered, indicating that the three engines had been shut down by the crew prior to them abandoning the aircraft.
  46. ↑ "BAe Harrier attrition list". Archived from the original on 25 January 2008. Retrieved 6 December 2007.
  47. ↑ List of live ejections from military aircraft for 1987 Archived 21 December 2007 at the Wayback Machine Retrieved: 6 December 2007.
  48. ↑ "The strange accident of the MiG-23".