Cessna 550 N753CC

Summary

On 21 December 2012 at about 16:00 local time, a Cessna 550 registered N753CC, operated by United States Customs Service, was involved in an accident near Oklahoma City, Oklahoma, United States. 2 people were on board and one had minor injuries. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

21 December 2012 at 16:00

Classification

Accident

Location

Oklahoma City, Oklahoma, United States

Nearest airport

Will Rogers World (OKC)

Coordinates

35.4042, -97.5886

Aircraft

Cessna 550

Registration

N753CC

Category

Airplane

Year built

1980

Engines

2

Operator

United States Customs Service

Operating rule

Public Use

Phase of flight

Not recorded

Route

Oklahoma City → Oklahoma City

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

CEN13TA113

1 person had minor injuries.

The flight crew's decision to fly close behind a heavy airplane, which did not ensure there was adequate distance and time in order to avoid a wake turbulence encounter with the preceding heavy airplane’s wake vortex, which resulted in a loss of airplane control during final approach.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

While on the right downwind leg, the flight crew advised the air traffic control tower controller that they would make a full stop landing. The tower controller acknowledged, told them to extend their downwind, and stated that he would call their base turn. The controller then called out the landing traffic on final, which was an Airbus A300-600 heavy airplane. The flight crew replied that they had the traffic in sight, and the controller cleared the flight to land behind the Airbus, and to be cautious of wake turbulence. The flight crew observed the Airbus abeam their current position and estimated that they made their base turn about 3 miles from the runway. Before turning onto final approach, the flight crew discussed wake turbulence avoidance procedures and planned to make a steeper approach and land beyond the Airbus's touchdown point. They also added 10 to 15 knots to the Vref speed as an additional precaution against a wake turbulence encounter. The reported wind provided by the tower controller was 180 degrees at 4 knots. The flight crew observed tire smoke from the Airbus as it touched down and discussed touching down beyond that touchdown point. The tower controller advised the flight crew to be prepared for a go-around if the Airbus did not clear the runway in time, which the flight crew acknowledged. The flight crew estimated that the Airbus had turned off the runway when their airplane was about 1,000 feet from the threshold and about 200 feet above ground level (agl). The flight crew reported having a stabilized approach to their planned landing point. When the airplane was about 150 feet agl and established on the runway centerline, the airplane experienced an uncommanded left roll. The heading swung to the left and the nose dropped. The crew reported that the airplane was buffeting heavily. Immediately, they set full power, and the flying pilot used both hands on the control wheel in an attempt to roll the airplane level and recover the pitch. He managed to get the airplane nearly back to level when the right main gear struck the ground short of the threshold and left of the runway. The airplane collided with a small drainage ditch and a dirt service road, causing the right main gear and the nose gear to collapse. Videos from cameras at the airport recorded the accident sequence, and the accident airplane was about 51 seconds behind the Airbus. A wake vortex study indicated that the accident airplane encountered the Airbus's right vortex, and the airplane's direction of left roll was consistent with the counter-clockwise rotation of the right vortex.

Quoted verbatim from the NTSB record.