What's new

170 die as Russian plane is struck by lightning

EagleEyes

ADMINISTRATOR
Joined
Oct 3, 2005
Messages
16,774
Reaction score
25
Country
Pakistan
Location
United States
170 die as Russian plane is struck by lightning

· 45 children killed in third major accident this year
· Crash raises questions over 'flying cigar'

a349947c10ce7c00aea873d130a32620.jpg


A Russian airliner that crashed in eastern Ukraine yesterday killing all 170 passengers and crew on board was probably struck by lightning as it encountered heavy turbulence, a preliminary investigation suggested last night. The Tu-154 was flying from the Black Sea resort of Anapa to St Petersburg when it went down in open countryside about 30 miles north of the city of Donetsk. More than a quarter of the aircraft's passengers were children.

Russia's transport ministry said bad weather had probably caused the crash on flight 612. "A report about heavy turbulence came at 15.37 Moscow time from the aircraft, which was at an altitude of 11,000 metres, and then the plane disappeared from radar screens," a spokesman told Interfax.St Petersburg-based Pulkovo airlines told reporters that the crew issued a second distress signal from a lower altitude but air traffic controllers could not make out the sentence that followed.

Aviation experts said the aircraft could survive a lightning strike, but flight instruments may have been knocked out, disorienting the pilot. The crash was the third major aviation tragedy in Russia this year.

Witnesses said the plane plunged into the ground intact, suggesting there had not been an explosion on board. A large bang was heard in the nearby village of Sukha Balka followed by a series of smaller bangs.
At least 45 children were among the dead, according to the airline. Most passengers were thought to be Russian holidaymakers from St Petersburg returning home, although foreigners including at least one Dutch citizen were reportedly among the dead.

Andrei Tyutyunikov, a reporter with local newspaper Donetskiye Novosti, who arrived at the scene shortly after the crash, told the Guardian the aircraft had been destroyed. He said: "It's just in pieces. I can see one large chunk with the letters on it. Emergency officials are dragging fragments of bodies from the wreckage. There's no one left alive."
Television pictures showed firefighters dousing blackened hillside covered in debris. Thirty bodies were recovered by late afternoon. Rescuers prepared to comb the wreckage through the night but they did not expect to find any survivors.

Irina Andrianova, a spokeswoman for the Russian emergency situations ministry, said a preliminary investigation indicated a lightning strike had caused the disaster. A team of medics and psychologists was dispatched to Pulkovo airport in St Petersburg to help distraught relatives waiting for the flight. The Ukrainian president, Viktor Yushchenko, cut short a holiday in Crimea to monitor the situation.

A 60-strong Russian emergency ministry team also flew from Rostov to help the rescue and clean-up effort. Relatives of the dead will be flown to the site today to identify bodies.

In July, a Sibir airlines Airbus A-310 crashed and burst into flames after veering off the runway in Irkutsk, killing 122 people. That accident was blamed on a malfunction in a thrust reverser. Two months earlier 113 people died when an Airbus A-320 belonging to Armenian airline Armavia crashed on its way from Yerevan to Sochi. The disaster was attributed to the pilot flying through bad weather.

The Tu-154 is known as the "flying cigar" because of its long fuselage and cramped cabin space. It is still one of the most commonly used planes in Russia.
"So far this crash is a mystery because the Tupolev is robust and every aircraft has a weather radar," said David Learmount of Flight International magazine. "The big question is: how the hell did the pilot get in the middle of a thunderstorm?"

http://www.guardian.co.uk/frontpage/story/0,,1856314,00.html
 
.
Its sad to hear, i wonder if there is any counter measure of incidents like these.
 
.
They are having lot of plane crashes recently, what wrong with russians? no funding?
 
.
Its sad to hear, i wonder if there is any counter measure of incidents like these.


Most aircraft skins are made primarily of aluminum, which is a very good conductor of electricity. By making sure that there are no gaps in this conductive path, the engineer can assure that most of the lightning current will remain on the exterior skin of the aircraft. Some modern aircraft are made of advanced composite materials, which by themselves are significantly less conductive than aluminum.

In this case, the composites are made with an embedded layer of conductive fibers or screens designed to carry lightning currents. These designs are thoroughly tested before they are incorporated in an aircraft.
Modern passenger jets have miles of wires and dozens of computers and other instruments that control everything from the engines to the passengers' music headsets. These computers, like all computers, are sometimes susceptible to upset from power surges. So, in addition to the design of the exterior of the aircraft, the lightning protection engineer must assure that no damaging surges or transients can be induced into the sensitive equipment inside of the aircraft.

Lightning traveling on the exterior skin of an aircraft has the potential to induce transients into wires or equipment beneath the skin. These transients are called lightning indirect effects. Problems caused by indirect effects in cables and equipment are averted by careful shielding, grounding and the application of surge suppression devices when necessary. Every circuit and piece of equipment that is critical or essential to the safe flight and landing of an aircraft must be verified by the manufacturers to be protected against lightning in accordance with regulations of the FAA or a similar authority in the country of the aircraft's origin.

The other main area of concern is the fuel system, where even a tiny spark could be disastrous. Therefore, extreme precautions are taken to assure that lightning currents cannot cause sparks in any portion of an aircraft's fuel system. The aircraft skin around the fuel tanks must be thick enough to withstand a burn through. All the structural joints and fasteners must be tightly designed to prevent sparks as lightning current passes from one section to another. Access doors, fuel filler caps and any vents must be designed and tested to withstand lightning. All the pipes and fuel lines that carry fuel to the engines, and the engines themselves, must be verified to be protected against lightning. In addition, new fuels that produce less explosive vapors are now widely used.

Radomes are the nose cones of aircraft that contain radar and other flight instruments. The radome is an area of special concern for lightning protection engineers. In order to function, radar cannot be contained within a conductive enclosure. Protection is afforded by the application of lightning diverter strips along the outer surface of the radome. These strips can be solid metal bars or a series of closely spaced buttons of conductive material affixed to a plastic strip that is bonded adhesively to the radome. These strips are sized and spaced carefully according to simulated lightning attachment tests, while at the same time not significantly interfering with the radar. In many ways, diverter strips function like a lightning rod on a building.
 
.
They are having lot of plane crashes recently, what wrong with russians? no funding?

The pilot mentioned severe turbulence caused by very bad weather. Eyewitness described the plane to by falling out of the sky like a leaf which indicates that power must have fallen out.
Experts at this stage believe that the plane was struck by lightening.

Btw, Tupovlev has a very bad safety record, both the Tu-154/164 should be grounded.
 
.
MOSCOW (updated on: August 23, 2006, 15:45 PST): Investigators have recovered the flight data and voice recorders from a Russian passenger jet that crashed in eastern Ukraine killing all 170 people aboard, Interfax news agency said on Wednesday.

"A few minutes after the first black box with flight data was found, the voice recorder was also found," Russian Transport Minister Igor Levitin was quoted as saying.

Levitin also said that investigators are examining recordings of conversations between the pilots and a Ukrainian air traffic control post in the eastern Ukrainian city of Kharkiv.

The plane, a Tupolev-154 jet owned by Russia's Pulkovo airlines, was flying Tuesday from the Russian Black Sea coast city of Anapa to Saint Petersburg when it ran into stormy weather and crashed, officials said.

Ukraine's Transport Minister Mykola Rudkovski said the plane had requested authorisation to fly 20 kilometres (12 miles) to the east of its planned route, Interfax said.

"That permission was given. It's difficult at the moment to establish the causes of the accident but we can see the influence of a cyclone," Rudkovski was quoted as saying.

Emergency workers were sifting through the wreckage on Wednesday to recover bodies and clues as grief-struck families travelled to the site to identify remains.
 
.
Back
Top Bottom