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. [1] There is still fuel in the tank(s), but it is unable to get 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. [2]
All engine-powered modes of transport can be affected by fuel starvation, although the problem is most serious for aircraft in flight. Ships are affected to the extent that without propulsion they cannot maneuver to avoid collisions or beaching. 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. [3]
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. [4]
Many incidents have happened on aircraft where fuel exhaustion or starvation played a role. A partial list of these incidents follows:
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:
The Douglas DC-7 is an American transport aircraft built by the Douglas Aircraft Company from 1953 to 1958. A derivative of the DC-6, it was the last major piston engine-powered transport made by Douglas, being developed shortly after the earliest jet airliner—the de Havilland Comet—entered service and only a few years before the jet-powered Douglas DC-8 first flew in 1958. Larger numbers of both DC-7B and DC-7C variants were also built.
In aviation, pilot error generally refers to an action or decision made by a pilot that is a substantial contributing factor leading to an aviation accident. It also includes a pilot's failure to make a correct decision or take proper action. Errors are intentional actions that fail to achieve their intended outcomes. The Chicago Convention defines the term "accident" as "an occurrence associated with the operation of an aircraft [...] in which [...] a person is fatally or seriously injured [...] except when the injuries are [...] inflicted by other persons." Hence the definition of "pilot error" does not include deliberate crashing.
United Airlines Flight 173 was a scheduled flight from John F. Kennedy International Airport in New York City to Portland International Airport in Portland, Oregon, with a scheduled stop in Denver, Colorado. On December 28, 1978, the aircraft flying this route ran out of fuel while troubleshooting a landing gear problem and crashed in a suburban Portland neighborhood near NE 157th Avenue and East Burnside Street, killing 10 people on board.
The Antonov An-12 is a transport aircraft designed and manufactured by the Ukrainian manufacturing and services company Antonov. Given the long operational history of the An-12, more than 190 An-12s have crashed involving many casualties. The An-12 has also been involved in a number of aviation incidents.
On May 21, 2000, a British Aerospace BAe-3101 Jetstream 3101 operated by East Coast Aviation Services crashed into mountainous terrain in Bear Creek Township, Wilkes-Barre, Pennsylvania. The plane was carrying 17 professional gamblers returning home from Caesar's Palace Casino in Atlantic City, New Jersey, along with 2 crew members. It was chartered by Caesar's Palace. All 19 passengers and crews on board were killed on impact. This accident, alongside the accident of Aerocaribe Flight 7831 were the accidents with the most fatalities involving the Jetstream 3101 airliner.