A single-engine plane crashed at Lawrence J. Timmerman Airport, Milwaukee, Wisconsin, on the evening of July 29.
Milwaukee County sheriff’s office spokesperson Fran McLaughlin said the plane caught fire after hitting the ground.
The plane was heading to Marquette University in Milwaukee, at the time.
The occupants of the plane, identified as Joseph Trustey, 53, and his daughter Anna Trustey, 18, lost their lives in the crash.
The NTSB and the FAA are investigating.
Press release from the BEA and the Commission d’Enquêtes Accidents et Incidents de l’Aviation civile (Mali)
Following the publication of the Interim Report on 20 September 2014 in Bamako (Mali), investigative work has continued, based on the analysis of the accident flight parameters. Progress made in this work has led the Republic of Mali Commission of Inquiry and the BEA to communicate jointly the following information.
On 24 July 2014, the MD-83 registered EC-LTV was performing scheduled night flight AH 5017 from Ouagadougou (Burkina Faso) to Algiers (Algeria). Takeoff occurred at 01h15, the climb towards the cruise altitude took place without any significant events, and the crew made several heading changes in order to fly around a storm cell. The autopilot and the autothrottle were engaged. The aeroplane reached the cruise altitude of 31,000 ft, that’s to say about 9,500 m. The autopilot then switched to the mode that maintains the altitude and the autothrottle to the mode that maintains the speed (Mach).
About two minutes after levelling off at an altitude of 31,000 ft, calculations performed by the manufacturer and validated by the investigation team indicate that the recorded EPR , the main parameter for engine power management, became erroneous on the right engine and then about 55 seconds later on the left engine. This was likely due to icing of the pressure sensors located on the engine nose cones. If the engine anti-ice protection system is activated, these pressure sensors are heated by hot air.
Analysis of the available data indicates that the crew likely did not activate the system during climb and cruise.
As a result of the icing of the pressure sensors, the erroneous information transmitted to the autothrottle meant that the latter limited the thrust delivered by the engines. Under these conditions, the thrust was insufficient to maintain cruise speed and the aeroplane slowed down. The autopilot then commanded an increase in the aeroplane’s pitch attitude in order to maintain the altitude in spite of this loss of speed.
This explains how, from the beginning of the error in measuring the EPR values, the aeroplane’s speed dropped from 290 kt to 200 kt in about 5 minutes and 35 seconds and the angle of attack increased until the aeroplane stalled.
About 20 seconds after the beginning of the aeroplane stall, the autopilot was disengaged. The aeroplane rolled suddenly to the left until it reached a bank angle of 140°, and a nose-down pitch
of 80°
The recorded parameters indicate that there were no stall recovery manœuvres by
the crew.
However, in the moments following the aeroplane stall, the flight control surfaces remained deflected nose-up and in a right roll.
CORRECTIVE ACTIONS
At least two similar events occurred, in June 2002 and in June 2014, with no serious consequences.
The event in June 2002 was the subject of an NTSB investigation report. On 4 June 2002, the McDonnell Douglas MD-82, registered N823NK performing Spirit Airlines flight 970, suffered a loss of thrust on both engines, in cruise at an altitude of 33,000 ft, that is about 10,000 m. The two pressure sensors, located on the engine nose bullets, were blocked by ice crystals, leading to incorrect indications and over-estimation of the EPR. The crew noticed the drop in speed and the precursor indications of a stall just before disengagement of the autopilot and putting the aeroplane into a descent. They had not activated the engine anti-ice systems. This event occurred during the day, outside the clouds.
On 8 June 2014, the MD83 registered EC-JUG belonging to Swiftair, which was performing a passenger transport flight at flight level FL 330, suffered a drop in speed while it was flying during the daytime above the cloud layer. The crew detected the problem, put the aeroplane into a descent and activated the engine anti-ice systems without reaching a stall situation, then continued the flight.
This background, as well as the data on the accident to flight AH5017, was shared with the European Aviation Safety Agency (EASA) and through EASA with the American authorities (FAA); they should serve as the basis for future publication of corrective measures aimed at assisting crews in identifying and responding to similar situations to those encountered at the time of this accident.
NEXT STEPS
The investigative work is continuing, in particular on the analysis of:
the flight parameters to complete the scenario described above,
possible crew reactions, despite the absence of Cockpit Voice Recorder data from the accident flight, which remain unusable to this day,
the training and follow-up of Swiftair crews,
previous events and the follow-up undertaken.
The publication of the final report is planned before the end of December 2015.
Download Interim below:
https://airflightdisaster.com/wp-content/uploads/2015/04/ec-v140724.e1.en_.pdf
Alaska Airlines flight AS-7015 suffered a wing tip strike on landing in Anchorage, Alaska, on December 19th.
The incident happened when the Boeing 737-700 plane was coming from Barrow, Alaska.
The plane rolled out uneventfully. All passengers and crew members remained unharmed.
Click to view full size photo at Airliners.net
Contact photographer Vincent Edlinger
What: Air France Airbus A380-800 en route from New York to Paris
Where: Long Island
When: Nov 27th 2009
Who: not available
Why: After takeoff, the plane indicated an autopilot problem. They returned to the airport where the plane landed, was repaired and took off again, arriving safely in Paris about 6 hours late-
What: Delta Boeing 757 en route from Atlanta to Seattle
Where: Great Falls International Airport
When: October 23, 2011, 12:30 pm
Who: 177 passengers, 1 emergency
Why: While en route, a passenger aboard flight 129 became unconscious.
The pilots diverted to Great Falls where they made an emergency landing, and delivered the passenger to an ambulance which took her to Benefits Health System, facilitated by the Montana Air National Guard Fire Department.
The flight took off again, promptly.
Overland Airways flight 1186 swerved off the runway at Ilorin Airport in Kwara State of Nigeria on November 29.
The ATR 72 aircraft, which departed from the Nnamdi Azikiwe Airport in Abuja, veered off the runway after it landed at Ilorin Airport at about 4:45 p.m.
Authorities confirmed that all 59 passengers and 4 crew members remained unhurt.
The Nigerian Civil Aviation Authority is investigating.
What: Beechcraft 55 Baron en route from Baytown TX to Sarasota FL
Where: 28 miles east of South Pass in the Gulf of Mexico
When: Sept. 20, 2012
Who: 2 aboard
Why: After the International Emergency Response Coordination Center notified 8th Coast Guard District command center of a beacon alert, the search began.
Two men whose flight ditched were rescued after the Border Patrol spotted them adrift in the Gulf of Mexico. A Coast Guard MH-65C Dolphin helicopter was launched.
The pilot hit the water at an estimated 100 knots after the plane caught fire and the cockpit filled with smoke. The two men aboard survived the crash and three hours in the water.
Coast Guard helicopter pilot Lt. Becki Fosha said that “They had a limited time to bring the aircraft to the water and then they had about two minutes to get all of their survival gear together and get ready for a survival situation before the aircraft submerged…They had a GPS sport beacon. They had their current EPERB 406 beacon. They had floatation and survival equipment for just this kind of scenario…the men did a great job ditching the plane.”
Theodore Wright and Raymond Fosdick were pulled out of the Gulf and flown to Belle Chasse Naval Base. Fosdick was hospitalized at Ochsner Medical Center.
