MAC decipher data from flight recorders of the crashed An-148
Factor in the development of a special situation on Board could be incorrect information on airspeed due to icing of the sensors.
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The plane crash of An-148 in the suburbs could be related to incorrect information on airspeed due to icing of the sensors. About it on Tuesday have informed in a press-service of Interstate aviation Committee (IAC) after decoding the data of onboard parametrical recorder.
“A preliminary analysis of the registered information, as well as analysis of similar cases in the past, suggests that a factor in the development of special situations in flight could be incorrect information on airspeed indicators on the pilots, which in turn was apparently due to icing receivers full pressure (PAP) when in the off state system of heating”, — reported in POPPY.
“In all other flights available on the recorder (15 flights), heated PDP was included prior to takeoff at the Executive launch”, — stated in the message.News
The aircraft collided with the ground in six minutes after takeoff. As noted in the Department, at an altitude of about 130-150 meters the crew switched on the autopilot, and a special situation on Board the An-148 has started to develop after about 2 min 30 sec. after takeoff the aircraft at an altitude of about 1300 meters and instrument speed 465-470 km/h — at this point, the flight recorders of the plane has recorded discrepancies between the readings of the speed sensors. After 30 seconds, the discrepancies in the readings of the speed sensors has reached about 30 km/h, after which came a single command, the crew of the “Instrument — compare”. At an altitude of about 2000 meters this command was repeated again, and this time the differences between the readings of the speed sensors are even more.
After the second command “Instrument — compare” the crew disconnected the autopilot, and the rest of the flight was in manual mode. Indications in speed of the air parameters is greatly varied: one showed a speed of 0 km/h, the other 540-560 km/h.
Then the speed reading was intensively last fall (up to 200 km/h and below), the aircraft was transferred to the intensive decrease with angular motion dive 30-35 degrees. Before the collision with the ground the speed reading one of the modules continued to be zero, the second shows the speed of 800 km/h “For 4-5 seconds before impact the aircraft began to develop the right Bank, which has reached 25 degrees,” said MACK, adding that the received information is being analyzed.
Passenger plane An-148 of “Saratov airlines”, carrying out flight from Moscow to Orsk, crashed 11 Feb few minutes after takeoff from Domodedovo airport. Its wreckage was found near the village Stepanovski Ramensky district, Moscow region. On Board were 71 people, no one survived. A criminal case under part 3 St. 263 criminal code of Russian Federation (“Infringement of safety rules of movement and operation of air transport, entailed on imprudence death of two or more persons”).
As the suspension of the operation of An-148 will have an impact on air travel?