Beschrijving:British Commonwealth Pacific Airlines Flight 304/44 was scheduled between Sydney (SYD), Australia, and San Francisco (SFO) with intermediate stops at Nadi (NAN), Fiji, Canton Island (CIS), and Honolulu (HNL). The flight to Honolulu was without incident.
|Datum:||donderdag 29 oktober 1953|
|Luchtvaartmaatschappij:||British Commonwealth Pacific Airways|
|Motoren:|| 4 Pratt & Whitney R-2800-CA15|
|Bemanning:||slachtoffers: 8 / inzittenden: 8|
|Passagiers:||slachtoffers: 11 / inzittenden: 11|
|Totaal:||slachtoffers: 19 / inzittenden: 19 |
|Gevolgen:|| Written off (damaged beyond repair)|
|Plaats:||12 km (7.5 mijl) SE of Half Moon Bay, CA (Verenigde Staten)
|Fase:|| Nadering (APR)|
|Soort vlucht:||Binnenlandse lijnvlucht|
|Vliegveld van vertrek:||Honolulu International Airport, HI (HNL/PHNL), Verenigde Staten|
|Vliegveld van aankomst:||San Francisco International Airport, CA (SFO/KSFO), Verenigde Staten|
The crew filed an IFR flight plan with ARTC (Air Route Traffic Control) which indicated a rhumb line course was to be flown to San Francisco with Sacramento the alternate airport. The estimated flying time of the flight was nine hours and 25 minutes. Flight 304/44 departed Honolulu at 22:59, October 28, 1953.
As the flight proceeded toward San Francisco hourly routine position reports were made to OFACS (Overseas Foreign Aeronautical Communication Station). At 05:55, the flight reported: "VHBPE Position 32.39N 134,40W. Time 1350 (0550). Altitude 11,500. Track 064 degrees. Ground speed 225 knots. Estimating over SFO at 1640Z (0840). Estimating arrival at Blocks 1650Z (0850)." In answer to a request from the flight, San Francisco ARTC, at 0807, cleared it to descend in accordance with Visual Flight Rules and to maintain at least 500 feet on top of clouds. The flight reported that it was starting descent at 08:15 and at that time was given the San Francisco 08:00 weather: "Measured ceiling 1.200 feet. broken. visibility nine statute miles. temperature 54. dew point 50, wind west 12 knots and altimeter 30.13." As the aircraft approached the coast, ARTC cleared the flight as follows: "ATC clears VHBPE to the San Francisco ILS Outer Marker via the Half Moon Bay Fan Marker direct to the San Francisco Outer Marker. Maintain at least 500 feet above all clouds. Contact San Francisco Approach Control after passing Half Moon Bay Fan Marker. Cloud tops reported in the Bay area l.700 feet." This message was acknowledged and repeated back. The last communication from the flight heard by OFACS was at 08:23 when the aircraft reported approximately 60 miles west of the coast.
At 08:39, the flight called San Francisco Approach Control, identified itself as "Air Pacific Echo" and advised that it was over Half Moon Bay, 500 on top. Approach Control acknowledged and gave the following clearance: "Cleared for an ILS approach to the airport, runway 28, wind west 15; cross the outer marker initial at least 500 on top, report when inbound; ceiling 1.200, visibility nine. altimeter 30.14."
Approximately three minutes later, the flight made a report which was acknowledged by the controller as "Air Pacific Easy, Roger, southeast, turning inbound"; the controller then added. "Check passing the ILS outer marker inbound."
His actual position however was southwest of the airport - not southeast. It is therefore probable that the captain after reporting over Half Moon Bay either saw the terrain momentarily through an unreported break in the overcast or because of a radio navigational error became convinced that his position was farther northeast, and started to let down over what he believed was the proper area for this descent.
The DC-6 initially struck and topped several large redwood trees, continued across a narrow ravine and crashed against the side of a steeply rising slope approximately one-half mile beyond the first tree struck. The elevation of this tree at the point of contact was 2902 feet MSL.
American pianist William Kapell was killed in the crash; he was returning from a tour in Australia.
PROBABLE CAUSE: "The failure of the crew to follow prescribed procedures for an instrument approach."
» ICAO Accident Digest Circular 39-AN/34 (126-128)
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet
de exacte vliegroute weer.
De afstand tussen Honolulu International Airport, HI en San Francisco International Airport, CA bedraagt 3835 km (2397 miles).
This information is not presented as the Flight Safety Foundation or the Aviation Safety Networkĺs opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.