United Airlines Flight 227 (N7030U), scheduled passenger flights from LaGuardia Airport New York City to San Francisco International Airport, California, fell short of the runway when attempting a scheduled landing at Salt Lake City International Airport, Utah on November 11, 1965.
Video United Airlines Flight 227
Breakdown details
Flight 227, operated by Boeing 727-22, registration N7030U, departs LaGuardia Airport at 0835 Mountain Standard Time (1035 EST) for San Francisco, California, with stops scheduled in Cleveland, Chicago, Denver and Salt Lake City. Flights to Denver are routine. In Denver, a new flight crew took over the aircraft: Captain Gale C. Kehmeier, First Officer Philip E. Spicer, and Second Officer Ronald R. Christensen. Flights depart from Denver in 1654 MST.
During the flight, the First Officer flew the plane under the direction of the Captain. In 1735 the aircraft was cleared to descend to 16,000 feet by the Salt Lake City Traffic Control Center.
In 1747, now under the direction of terminal control, the plane was cleared to get close. In 1748, in response to a request for aircraft height controllers, the pilot replied, "Okay, we have slowed down to twenty-fifty (knots) and we are at ten (10,000 ft).We have runways visible now, we will cancel and standby with your traffic. "The aircraft began to fall, but the rate of decline was about 2,300 feet per minute, almost three times the recommended speed.
At about 1749: 30, the aircraft passes an outer sign of 5.7 miles from the runway threshold at about 8,200 feet, over 2,000 feet above the normal glideslope.
Around 1751, one minute before impact, the aircraft reached 6,300 feet; it's still 1,300 meters above the normal sloping slope and still down at 2,300 feet per minute. Around this time the first officer reached in the direction to advance the thrust lever to increase the thrust, but the captain shook off his hand and said, "Not yet."
At 30 seconds before impact the plane was 1,000 feet above and 1.25 miles from the runway. The captain indicated in the postwar interview that at this point he moved the push lever to the take-off power position, but his machine failed to respond properly. However, testimony from other crew members and data from flight data recorders indicates that efforts to add power only occur about 10 seconds before a collision occurs.
In 1752, the plane hit the ground 335 feet from the runway. The aircraft slid 2,838 feet before stopping. Separation of landing gear and machine No. 1 is the result of impact loading that exceeds the structural strength of the design. Failure of the landing gear led to the breaking of the fuel line in the fuselage. The fires generated, rather than the impact of the accident, caused 43 casualties.
Maps United Airlines Flight 227
Conclusion investigation
The accident was blamed entirely on the poor judgment of the Captain, Gale C. Kehmeier, for taking the latter approach from an exorbitant position and too close to the airport to allow it to drop at a normal and safe level. He allowed the aircraft to fly the final approach segment (in visual condition) with a drop rate of 2,300 feet per minute (3 times the safe decline rate). As the plane crossed the outside marker, which marked the last approach segment, it was 2,000 feet high.
The First Officer, who was flying the plane under the direction of the Captain, tried to add a boost to the engine. But the Captain said no and touched his hand from the lever. The captain took control for the last few seconds, but it was too late to avoid an accident on the runway. The aircraft impacted with a 14.7-g vertical acceleration style.
The severe impact force broke the left main landing gear and caused the right main gear to push through the fuselage, crippling the pressurized fuel line in the process. As the plane continued to slide on the runway in the nose and fuselage, the pressurized fuel burned inside the cabin, turning a crash that could survive into a fatal accident. Many of the 50 people who were successfully evacuated were badly burned.
The CAB (Civil Aeronautics Board) accident investigation revealed that the Captain has a history of checkered training. He had failed in his first jet transition training course, and returned to fly DC-6. Later, he also failed to pass the routine annual instrument skills test.
References
Source
- NTSB (November 11, 1965). "Identification of NTSB: DCA66A0004". NTSB . Retrieved 2006-12-18 .
- "Aircraft Crash Report". United Air Lines, Inc. Boeing 727, N7030U Salt Lake City, Utah November 11, 1965 . Civil Aeronautical Board. June 7, 1966. File No. 1-0032 . Retrieved 2015-07-18 .
Source of the article : Wikipedia
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