Continental Express Flight 2574

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Continental Express Flight 2574
Flight 2574 wreckage.jpg
Wreckage of Flight 2574
Accident
DateSeptember 11, 1991 (1991-09-11)
SummaryIn-flight structural failure [1]
Site Colorado County, near Eagle Lake, Texas, USA
29°31′38″N96°23′21″W / 29.52722°N 96.38917°W / 29.52722; -96.38917
Aircraft
Aircraft type Embraer EMB 120RT Brasilia
Operator Britt Airways, Inc., dba Continental Express
IATA flight No.RU2574
ICAO flight No.BTA2574
Call signJETLINK 2574
Registration N33701
Flight origin Laredo International Airport, Laredo, Texas
Destination Houston Intercontinental Airport, Houston, Texas
Occupants14
Passengers11
Crew3
Fatalities14
Survivors0

Continental Express Flight 2574 (Jetlink 2574) was a scheduled domestic passenger airline flight operated by Britt Airways [2] from Laredo International Airport in Laredo, Texas to Houston Intercontinental Airport (IAH) (now called George Bush Intercontinental Airport) in Houston, Texas. On September 11, 1991, the Embraer EMB 120 Brasilia turboprop, registered N33701, [3] crashed while initiating its landing sequence, killing all 14 people on board. The aircraft wreckage hit an area near Eagle Lake, Texas, approximately 65 miles (105 km) west-southwest of the airport.

Contents

The media stated that there was initial speculation that a bomb had destroyed the aircraft; however, the National Transportation Safety Board (NTSB) subsequently discovered that missing screws on the horizontal stabilizer led to the crash. [4]

Aircraft and crew

The aircraft involved in the accident, during its test flight, in 1989. Dec 1989 Continental Express PTSKU N33701 Embraer EMB120 Brasilia.jpg
The aircraft involved in the accident, during its test flight, in 1989.

The Embraer 120 Brasilia, serial number 120077, was built in 1988, three years before the accident, and had accumulated 7,229 flight hours through 10,009 cycles. [1] : 8  The Federal Aviation Administration records stated that the aircraft had been sent to the maintenance hangar 33 times for unscheduled repairs. [5]

The crew consisted of 29-year-old captain Brad Patridge of Kingwood, Texas (Greater Houston), 43-year-old first officer Clint Rodosovich of Houston and 33-year-old flight attendant Nancy Reed of Humble, Texas. [6] Patridge and Rodosovich were experienced pilots with 4,243 flight hours and 11,543 flight hours (including 2,468 hours and 1,066 hours on the EMB 120 Brasilia), respectively. [1] : 5 

Incident

The EMB 120 departed Laredo International Airport at 09:09, operating under Federal Aviation Regulation Part 135. After a normal takeoff, the flight was assigned a cruise altitude of flight level 250 (25,000 feet (7,600 m)), then reassigned to FL240 (24,000 feet (7,300 m)). At 09:54, the flight crew responded to the Houston Air Route Traffic Control Center and started descending to 9,000 feet (2,700 m). At approximately 10:03 while descending through 11,500 feet (3,500 m) with an indicated airspeed of 260 knots (300 mph; 480 km/h), the leading edge of the left horizontal stabilizer separated from the airframe, and the airplane pitched down dramatically, rolling around on an axis as the left wing folded. [1] The escaping fuel from the wings ignited, and the pilots lost consciousness from the severe g-forces, which reached at least 3.375 times the force of gravity, [1] caused by the severe oscillations of the crippled aircraft. The wreckage fell in southeast Colorado County, Texas, exploding on impact, off Farm to Market Road 102, seven miles (11 km) southeast of Eagle Lake, Texas, [7] and 60 miles (97 km) west of Downtown Houston. [8] The Texas Department of Public Safety announced that rescue units had discovered no survivors. [7] The wreckage was spread over a 2- to 4-square-mile (10 km2) area, and some pieces fell into the Colorado River. [8] Diamonds worth approximately $500,000 (1991 value; $1,100,000 [9] in 2023) were discovered in the wreckage, but they had no role in the crash. [6]

Investigation

The National Transportation Safety Board (NTSB) investigation revealed that screws had been removed from the horizontal stabilizer during maintenance the night before the accident and, following a shift change, the screws had not been replaced. [1] : 48, 49  The aircraft's first flight of the day was uneventful because it did not reach the accident flight's top speed of 260 knots (480 km/h; 300 mph). [1]

The NTSB cited the failure of airline maintenance and inspection personnel to adhere to proper maintenance and quality-assurance procedures. The failure of Federal Aviation Administration (FAA) surveillance to detect and verify compliance with approved procedures was cited as a contributing factor. [1] : 49  Following the accident, the FAA conducted a National Aviation Safety Inspection Program (NASIP) of Continental Express' maintenance program. It found very few safety deficiencies, and complimented the airline on its internal evaluation system. The NTSB expressed concern that the NASIP did not find deficiencies in shift-turnover procedures and other matters relevant to the accident, and recommended that the agency improve its NASIP procedures.[ citation needed ]

Probable cause

The NTSB determined the probable causes of the accident as follows:

"The failure of Continental Express maintenance and inspection personnel to adhere to proper maintenance and quality assurance procedures for the airplane's horizontal stabilizer de-ice boots that led to the sudden in-flight loss of the partially secured left horizontal stabilizer leading edge and the immediate severe nose-down pitchover and breakup of the airplane. Contributing to the cause of the accident was the failure of the Continental Express management to ensure compliance with the approved maintenance procedures, and the failure of FAA surveillance to detect and verify compliance with approved procedures." [1] : 50 

Role in developing the culture of safety

Some experts say that the crash of Continental Express Flight 2574 was the most dramatic turning point for "safety culture" in the United States. [10] NTSB member Dr. John Lauber suggested that the probable cause of the accident included "The failure of Continental Express management to establish a corporate culture which encouraged and enforced adherence to approved maintenance and quality assurance procedures." [1] : 54  As a result of this and other similar aviation accidents, safety culture became the main topic at the U.S. National Summit on Transportation Safety, hosted by the NTSB in 1997.[ citation needed ]

This movement for air safety continued with the April 5, 2000 enactment of the Wendell H. Ford Aviation Investment and Reform Act for the 21st Century, also called AIR 21.

Dramatization

The Discovery Channel Canada / National Geographic TV series Mayday featured the accident in a Season 11 episode titled "Breakup Over Texas." [11]

Smithsonian Channel also featured this episode in its series Air Disasters (2013, Season 3, Episode 6.)

See also

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References

PD-icon.svg This article incorporates public domain material from websites or documents of the National Transportation Safety Board .

  1. 1 2 3 4 5 6 7 8 9 10 Aircraft Accident Report: Britt Airways, Inc., d/b/a Continental Express Flight 2574, In-Flight Structural Breakup, EMB-120RT, N33701, Eagle Lake, Texas, September 11, 1991 (PDF). National Transportation Safety Board. July 21, 1992. NTSB/AAR-92/04. Retrieved September 9, 2016. - Copy at Embry-Riddle Aeronautical University.
  2. ↑ "In-Flight Structural Breakup, Britt Airways, Inc. dba Continental Express Flight 2574, EMB-120RT, N33701, Eagle Lake, Texas, September 11, 1991". www.ntsb.gov. Retrieved June 15, 2019.
  3. ↑ Ranter, Harro. "ASN Aircraft accident Embraer EMB-120RT Brasilia N33701 Eagle Lake, TX". aviation-safety.net. Retrieved June 15, 2019.
  4. ↑ Muck, Patti. "Crash searchers find stabilizer/Discovery points to maintenance mix-up, not bomb Archived October 15, 2012, at the Wayback Machine ." Houston Chronicle . Monday September 16, 1991. A1. Retrieved on August 23, 2009.
  5. ↑ Gill, Dee and Ivanovich, David. "Crash in Colorado County/Plane sent for repairs 33 times, records show" (Archive). Houston Chronicle . Thursday September 12, 1991. A13. Retrieved on August 23, 2009.
  6. 1 2 Horswell, Cindy; Milling, T. J. & Sallee, Rad. (September 14, 1991). "Crash in Colorado County/Attendant on doomed aircraft had resigned to take a new job". Houston Chronicle . p. A27. Archived from the original on October 15, 2012. Retrieved August 23, 2009.
  7. 1 2 Staff. "12 killed in commuter jet crash/Laredo-to-Houston flight goes down near Eagle Lake" (Archive). Houston Chronicle . Wednesday September 11, 1991. A1. Retrieved on August 23, 2009.
  8. 1 2 Muck, Patti, Toth, John, Liebrum, Jennifer, and Gill, Dee. "14 die in commuter air crash/Charred site is 60 miles west of city" (Archive). Houston Chronicle . Thursday September 12, 1991. A1. Retrieved on August 23, 2009.
  9. ↑ 1634–1699: McCusker, J. J. (1997). How Much Is That in Real Money? A Historical Price Index for Use as a Deflator of Money Values in the Economy of the United States: Addenda et Corrigenda (PDF). American Antiquarian Society. 1700–1799: McCusker, J. J. (1992). How Much Is That in Real Money? A Historical Price Index for Use as a Deflator of Money Values in the Economy of the United States (PDF). American Antiquarian Society. 1800–present: Federal Reserve Bank of Minneapolis. "Consumer Price Index (estimate) 1800–" . Retrieved February 29, 2024.
  10. ↑ Meshkati, N. (April 1997). Human Performance, Organizational Factors and Safety Culture. Symposium, Corporate culture and transportation safety; 1997; Arlington, VA. Washington: National Transportation Safety Board.
  11. ↑ "Breakup Over Texas". Mayday . Season 11. 2011. Discovery Channel Canada / National Geographic Channel.
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