

| Subject: | Re: PopTop Alarm ..... Conclusion ???? |
| From: | David Beierl |
| Date: | Fri, 1 Mar 2002 11:02:01 -0500 |
At 10:50 AM 3/1/2002, Stan Wilder wrote: >If I were truly worried about making this awesome mistake I'd store my >car keys on a hook or magnet on the Pop-top locking devise. That way I'd >have to drop the top to get the keys. That in itself should be a good >reminder that the top needed to be secured. tsk tsk tsk...pride goeth before a fall. <g> Remember all the people who landed their airplanes with the gear up even though they had a checklist *and* a mechanical voice in the cockpit yelling at them. Or the twin-engine pilot who took off with a garment bag draped over the stabilator -- plane didn't fly for beans. Or these helo accidents: >The following examples illustrate this type of external load accident and >the resulting consequences: > > * A Soloy 47G helicopter assisted in the installation of electrical > transmission lines during a Part 133 operation. > >The helicopter departed with a 150-foot long-line attached and no external >load on the hook. According to the NTSB, there was no reason for the >long-line to be attached since the operator was transporting passengers in >conjunction with their construction and inspection duties. After liftoff, >the helicopter moved forward approximately 200 feet toward a tree line. As >the helicopter began a left turn away from a man-made obstacle, the >long-line tangled in the trees, causing the ship to crash. The helicopter >was destroyed on impact, fatally injuring one of the three occupants and >seriously injuring the other two. > > * An Aerospatiale 316B was moving equipment in mountainous terrain. A > 100-foot cable was attached to the helicopter for the purpose of carrying > the equipment. Later, the operator needed to transport several workers to > a hilltop site, and the helicopter was pressed into temporary passenger > service. > >According to eyewitnesses, the helicopter took on several passengers, then >the pilot initiated a normal takeoff rather than the vertical takeoff that >workers are accustomed to seeing when a slingload is attached. > >As the helicopter departed, the cargo hook snagged on an equipment trailer >adjacent to the takeoff area. As tension on the line increased, the hook >broke free of the trailer and the cable recoiled into the main rotor >blades, rendering the helicopter uncontrollable. The helicopter suffered >substantial damage on impact; all five of the occupants sustained serious >or fatal injuries. > > * A Bell 206B-3 was transporting seismic equipment in an aluminum > basket attached to the end of a 100-foot long-line. After flying for > approximately two hours, the helicopter completed its planned activities. > The operator repositioned the 206 to an adjacent landing zone for routine > maintenance and inspections. > >During the flight to reposition the helicopter, the 206 reached an >altitude of approximately 50 to 60 feet AGL when the aluminum mesh basket >caught on a nearby fence. The helicopter was substantially damaged; >however, the helmeted pilot received only minor injuries. > >According to the NTSB report, the pilot started the takeoff without >determining whether the 100-foot long-line was still attached to the cargo >hook. The pilot stated he forgot that the long-line and basket were still >attached to the helicopter. > >Not unique > >All of these mishaps involved Part 133 operators and properly certified >pilots. The accidents were not unique to any one region of the United >States, and involved a range of helicopter types to carry out various >missions. In all of these and other related accident reports, the NTSB >cited the pilot-in-command as performing an "inadequate or incomplete >preflight" as well as the "pilot's failure to maintain adequate ground >clearance with the aircraft's attached cable/long-line." > >More importantly, several pilots and their passengers lost their lives or >suffered serious injuries in accidents that, had the pilots been more >vigilant, would never have happened. > >Back to Rotor & Wing News and Highlights david -- David Beierl - Providence, RI http://pws.prserv.net/synergy/Vanagon/ '84 Westy "Dutiful Passage" '85 GL "Poor Relation"
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