Incident Overview

Date: Saturday 9 June 1973
Aircraft Type: Lockheed L-1049H Super Constellation
Owner/operator: Aircraft Specialties
Registration Number: N173W
Location: 1,9 km SW of Casey Airport, QC – ÿ Canada
Phase of Flight: Initial climb
Status: Destroyed, written off
Casualties: Fatalities: 3 / Occupants: 3
Component Affected: FlapsFlaps
Category: Accident
The Constellation aircraft experienced a catastrophic sink rate following takeoff, resulting in impact with trees and fragmentation. A fire ignited, and the pilot initiated maneuvers to correct the sink rate. However, the flaps were inadvertently selected upwards, leading to a rapid sink. The pilot successfully corrected the issue by rotating the aircraft, but the sink was too severe to avoid ground contact.The Constellation aircraft experienced a catastrophic sink rate following takeoff, resulting in impact with trees and fragmentation. A fire ignited, and the pilot initiated maneuvers to correct the sink rate. However, the flaps were inadvertently selected upwards, leading to a rapid sink. The pilot successfully corrected the issue by rotating the aircraft, but the sink was too severe to avoid ground contact.

Description

The Constellation sank back after takeoff, impacted trees and broke up. A fire erupted. The aircraft was engaged in spraying pesticides to control spruce budworm in the Quebec wilderness. It is concluded that after takeoff the flaps were inadvertently selected up. The selection was made at a lower than normal altitude and prior to obtaining the minimum flap retraction speed. A sink rate developed, which the pilot recognized and tried to correct by rotating the aircraft. When this failed to arrest the sink rate, the pilots realized the flaps were up or coming up, and then reselected the flaps to the takeoff position. By this time, however, it was too late to avoid ground contact. CAUSE: Deliberate or inadvertent retraction of flaps prematurely. Crew fatigue.

Source of Information

http://ottawacitizen.com/news/local-news/queen-of-the-sky-1973-crash-of-super-connie-lures-orleans-pilot-deep-into-quebec-bushhttp://ottawacitizen.com/news/local-news/queen-of-the-sky-1973-crash-of-super-connie-lures-orleans-pilot-deep-into-quebec-bush

Primary Cause

Deliberate or inadverent retraction of flaps prematurely, resulting in upward flap selection.Deliberate or inadverent retraction of flaps prematurely, resulting in upward flap selection.

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