Dual engine power loss during positioning flight

Casualties unknown • Sussex, NJ, US

A pilot experienced a dual engine power loss approximately four miles from the destination during a 15-minute positioning flight, resulting in an emergency landing in a field.

What happened

The pilot was conducting a 15-minute positioning flight when, approximately 4 miles from the intended destination, both engines lost power. The pilot subsequently performed an emergency landing in an open field, during which the aircraft struck trees. At the time of departure, the pilot reported having approximately 800 pounds of fuel on board and believed the gauges showed roughly 300 pounds remaining at the moment the power loss occurred.

The investigation

Post-accident examination of the fuel system revealed that over 200 pounds of fuel remained in the forward tank, while the rear tank indicated 30 pounds. Investigators found that both boost pumps were functional. However, a discrepancy was noted between the two pumps: the rear tank boost pump failed to extinguish the low fuel pressure light, whereas the forward tank boost pump functioned correctly. Additionally, the investigation determined that the low fuel quantity light for the aft tank—which is designed to illuminate when fuel levels reach approximately 100 pounds—was inoperative because of a corroded wire connection.

Probable cause

The engine power loss was related to fuel issues involving an inoperative low fuel quantity light due to a corroded wire and a failure of the rear tank boost pump to extinguish the low fuel pressure light.

Frequently asked questions

What happened in the 1997-07-23 DE Havilland DHC-6-200 accident near Sussex, NJ?

A pilot experienced a dual engine power loss approximately four miles from the destination during a 15-minute positioning flight, resulting in an emergency landing in a field.

What aircraft was involved and where did it happen?

The accident on 1997-07-23 involved a DE Havilland DHC-6-200, registration N491AL, operated by Skys The Limit, at Sussex, NJ.

What was the probable cause of the accident?

The engine power loss was related to fuel issues involving an inoperative low fuel quantity light due to a corroded wire and a failure of the rear tank boost pump to extinguish the low fuel pressure light.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X08493. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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