Summary
On November 01, 1996, a Bell 206B (N90144) was involved in an accident near Supai, AZ. The accident resulted in 1 minor injury. The aircraft was destroyed.
The National Transportation Safety Board determined the probable cause of this accident to be: Improper routing of the external cargo hoist cable (over helicopter skid), which resulted in lateral imbalance and roll-over of the helicopter, as weight on the cable became effective.
On November 1, 1996, at 1230 hours mountain standard time, a Bell 206B helicopter, N90144, dynamically rolled over and crashed while lifting an external sling load from an uncharted mountainous helipad located near Supai, Arizona. The helicopter was owned and operated by Action Helo of Arizona, under 14 CFR Part 133 for the local flight. Visual meteorological conditions prevailed at the time of the accident and a company VFR flight plan had been filed for the operation. The helicopter was destroyed and property on the ground was damaged in the ensuing crash.
This accident is documented in NTSB report LAX97LA030. AviatorDB cross-references NTSB investigation data with FAA registry records to provide comprehensive safety information for aircraft N90144.
Accident Details
Probable Cause and Findings
improper routing of the external cargo hoist cable (over helicopter skid), which resulted in lateral imbalance and roll-over of the helicopter, as weight on the cable became effective.
Aircraft Information
Registered Owner (Historical)
Analysis
On November 1, 1996, at 1230 hours mountain standard time, a Bell 206B helicopter, N90144, dynamically rolled over and crashed while lifting an external sling load from an uncharted mountainous helipad located near Supai, Arizona. The helicopter was owned and operated by Action Helo of Arizona, under 14 CFR Part 133 for the local flight. Visual meteorological conditions prevailed at the time of the accident and a company VFR flight plan had been filed for the operation. The helicopter was destroyed and property on the ground was damaged in the ensuing crash. The certificated commercial pilot, the sole occupant, sustained minor injuries.
In his written accident report, the pilot said that "while lifting to a hover over a cargo net external load, the 40 foot cable became fouled over the skid (left-right unknown). Control limits were exceeded with an increasing roll rate. The load was released by the electrical switch but the helicopter contacted the ground nose low striking main rotors to the ground. From initial down-force on [the] skid to impact[, it] was less than perhaps four seconds." The pilot also reported that there were no mechanical malfunctions with the helicopter.
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# LAX97LA030