Golden West Airlines Flight 261 (original) (raw)
El Vuelo 261 de Golden West Airlines, un de Havilland Twin Otter DHC-6, chocó con un Cessna 150 (N11421), propiedad de ., cerca de Whittier, California.
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| dbo:abstract | El Vuelo 261 de Golden West Airlines, un de Havilland Twin Otter DHC-6, chocó con un Cessna 150 (N11421), propiedad de ., cerca de Whittier, California. (es) Golden West Airlines Flight 261, a De Havilland Twin Otter DHC-6, collided with a Cessna 150 (N11421), owned by CessnAir Aviation, Inc., near Whittier, California. The accident occurred on January 9, 1975, at approximately 4:07 p.m. PST, while the Sun was just 9 degrees above the western horizon, directly into the eyes of the pilots of GW flight 261. Both aircraft were destroyed by the collision and subsequent ground impact. The 10 passengers and 2 pilots on the Twin Otter, and the instructor pilot and student pilot in the Cessna 150 were killed. Debris fell on homes and lawns but no one on the ground was injured. The wreckage of both aircraft was scattered over an 8 to 10 city block area. The fuselage of the Twin Otter fell into the schoolyard of Katherine Edwards Middle School, where about 300 spectators were watching an outdoor basketball game, while the wings landed two blocks away. The fuselage of the Cessna fell in the front yard of a house, about two blocks from the Otter fuselage. The Cessna impacted the left side of the Twin Otter at an approximate angle of 90 degrees. "(1) the Cessna's firewall and instrument panel were embedded in the Twin Otter's fuselage forward of the wing; (2) the propeller slashes in the Cessna's right wing formed an angle of about 88 degrees with the wing leading edge; and (3) the Twin Otter's left engine nacelle and engine were driven inboard by the collision." Ground witnesses said that neither plane made any last moment maneuver attempt to avoid the collision. GW 261 was a regularly scheduled passenger flight between the Ontario International Airport (ONT) and the Los Angeles International Airport (LAX), both in the Los Angeles area of California. The flight departed from ONT at 1556 PST, on a visual flight rules (VFR) flight plan. That separated GW 261 from the larger aircraft, which arrived at LAX on instrument flight rules (IFR) flight plans. The IFR flights were required to remain within the confines of the Los Angeles Group 1 terminal control area (TCA), while smaller planes were required to remain outside of the TCA, until the designated entry point, which was specified in their assigned VFR TCA arrival. In the case of GW 261, it was to remain outside of the TCA until the 10 DME fix of runway 24 right localizer, and to enter at an altitude of 1,500 feet MSL. The top of the TCA was 7,000 feet, while the base varied, depending on the distance from LAX. That mixed it in with all the other small plane VFR traffic in the Los Angeles Basin, which did not have transponders. Most of those were not flying to LAX, so they were not in radio communication with LAX radar controllers. The only defense was the "see and be seen" method of collision avoidance. That deficient method of traffic separation failed to work that day, as it has failed many other times in high density traffic areas. (en) Il volo Golden West Airlines 261, un De Havilland DHC-6 Twin Otter, si scontrò con un Cessna 150 (N11421) di proprietà della CessnAir Aviation, Inc., vicino a Whittier, in California. L'incidente avvenne il 9 gennaio 1975 alle 16:07 PST circa, mentre il sole era a soli 9 gradi sopra l'orizzonte occidentale, direttamente negli occhi dei piloti del volo GW 261. Entrambi i velivoli vennero distrutti dalla collisione e dal successivo impatto al suolo. I 10 passeggeri e i 2 piloti del Twin Otter, assieme al pilota istruttore e l'allievo pilota del Cessna 150, persero la vita. I detriti caddero sulle case e sui prati, ma nessuno a terra rimase ferito. I relitti dei due aerei si sparsero su un'area di 8-10 isolati. La fusoliera del Twin Otter cadde nel cortile della , dove circa 300 spettatori stavano assistendo a una partita di basket all'aperto, mentre le ali precipitarono a due isolati di distanza. La fusoliera del Cessna cadde nel cortile di una casa, a circa due isolati dalla fusoliera dell'Otter. Il Cessna colpì il lato sinistro del Twin Otter con un angolo approssimativo di 90 gradi. "(1) il muso e il pannello degli strumenti del Cessna erano conficcati nella fusoliera del Twin Otter davanti all'ala; (2) i tagli dell'elica nell'ala destra del Cessna formavano un angolo di circa 88 gradi con il bordo anteriore dell'ala; e (3) il motore sinistro del Twin Otter è stato spinto all'interno dalla collisione." Alcuni testimoni a terra affermarono che nessuno dei due aerei effettuò alcun tentativo di manovra dell'ultimo momento per evitare la collisione. Il volo GW 261 era un volo passeggeri di linea regolare tra l'aeroporto internazionale di Ontario (ONT) e l'aeroporto internazionale di Los Angeles (LAX), California. Il volo era partito da ONT alle 1556 PST, secondo un piano di volo basato sulle regole del volo a vista (VFR), a differenza del velivolo più grande, giunto al LAX secondo le regole di volo strumentali (IFR). I voli IFR dovevano rimanere entro i confini dell'area di controllo del terminal (TCA) del Gruppo 1 di Los Angeles, mentre gli aerei più piccoli dovevano rimanere al di fuori del TCA, fino al punto di ingresso designato, che è stato specificato nel loro arrivo TCA VFR assegnato. Nel caso del GW 261, doveva rimanere al di fuori del TCA fino a 10 DME del localizzatore destro della pista 24, ed entrare ad un'altitudine di 1.500 piedi MSL. La parte superiore del TCA era di 7.000 piedi, mentre la base variava a seconda della distanza da LAX. Questo lo mescolava con tutto il traffico VFR di piccoli aerei nel bacino di Los Angeles, privo di transponder. La maggior parte di questi non stavano volando all'aeroporto di Los Angeles, quindi non erano in comunicazione radio con i controllori di volo. L'unica indicazione era il metodo "vedere ed essere visti" per evitare le collisioni. Quel metodo antiquato di separazione del traffico non funzionò quel giorno, come del resto in molte altre occasioni nelle aree ad alta densità di traffico. (it) |
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| dbp:name | Golden West Airlines Flight 261 (en) |
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| dbp:plane1Caption | N6383, the aircraft involved in the accident in February 1968 at Long Beach Airport while still in service with Aero Commuter (en) |
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| dbp:site | Whittier, California, USA (en) |
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| dbp:type | Mid-air collision (en) |
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| rdfs:comment | El Vuelo 261 de Golden West Airlines, un de Havilland Twin Otter DHC-6, chocó con un Cessna 150 (N11421), propiedad de ., cerca de Whittier, California. (es) Golden West Airlines Flight 261, a De Havilland Twin Otter DHC-6, collided with a Cessna 150 (N11421), owned by CessnAir Aviation, Inc., near Whittier, California. The accident occurred on January 9, 1975, at approximately 4:07 p.m. PST, while the Sun was just 9 degrees above the western horizon, directly into the eyes of the pilots of GW flight 261. (en) Il volo Golden West Airlines 261, un De Havilland DHC-6 Twin Otter, si scontrò con un Cessna 150 (N11421) di proprietà della CessnAir Aviation, Inc., vicino a Whittier, in California. L'incidente avvenne il 9 gennaio 1975 alle 16:07 PST circa, mentre il sole era a soli 9 gradi sopra l'orizzonte occidentale, direttamente negli occhi dei piloti del volo GW 261. (it) |
| rdfs:label | Golden West Airlines Flight 261 (en) Vuelo 261 de Golden West Airlines (es) Volo Golden West Airlines 261 (it) |
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