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AAIU Final Reports From Carried Out Investigations Into Aviation Occurrences in 2016, 2017

AAIU Final Reports From Carried Out Investigations Into Aviation Occurrences in 2016, 2017

Investigation of a serious incident related to a loss of separation, realized on September 8, 2016 with involved Airbus by А321-211 aircraft, registration marks TC-ATF, and Boeing B737-8F2 aircraft, registration marks TC-JVS in the controlled air space of the Republic of Bulgaria

At 15:02 UTC on 8 September 2016, an infringement of the minimum standards of radar separation between two aircrafts transiting the upper airspace of Bulgaria was committed in the controlled airspace, family sector Sofia-East. Aircraft Airbus A321-211, reg. marks TC-ATF, of “Atlasjet" performing flight KKK8YJ and Boeing 737-8F2, reg. marks TC-JVS of “Turkish Airlines” performing flight THY4AV, passed by each other at a minimal horizontal distance of 1,2 NM at FL 363 without any vertical separation. After the separation between aircraft was recovered, the flight crew of KKK8YJ reported a technical problem and flight crew of THY4AV reported “TCAS RA.

Investigation of a serious incident related to a loss of separation, realized on June 4, 2016 with involved Аirbus А320-232 aircraft, registration marks TC-ATK, and Boeing B737-8F2 aircraft, registration marks TC-JGF in the controlled air space of the Republic of Bulgaria

On 4 June 2016 at 15:19 UTC in the controlled airspace of the Republic of Bulgaria, sector “Sofia-West”, it was admitted a violation of the standard for safe minimum separation between aircraft transiting in the upper airspace of Bulgaria. Airbus A320-232 aircraft, registration marks TC-ATK of AO “Atlasjet” performing flight KKK5LP and Boeing 737-8F2 aircraft, registration marks TC-JGF of  AO “Turkish Airlines”, flight THY7FX, passed each other with minimal horizontal distance of 2,6 nm and 500 ft. vertical separation. Due to the approach admitted, the automated collision avoidance systems (ACAS) on board of both aircrafts reacted. Both pilots in command reported “TCAS RA”.

Investigation of a serious incident on 30.06.2015 with FALCON F900 aircraft, registration marks VP-CGD, and EMBRAER 170 aircraft, registration marks SP-LDK, started in the controlled air space of the Republic of Romania and realized in the controlled air space of the Republic of Bulgaria

On 30.06.2015 at 12:26 h UTC, in the controlled upper airspace of the Republic of Bulgaria, particularly in Sofia Control FS Varna East Upper airspace an infringement of the standards on the minimum radar separation between two aircraft occurred. An unidentified unknown aircraft flying without two way radio communication and without transmitting transponder (Mode A/C) passed by a controlled aircraft Falcon 900, registration marks VP-CGD, of „VOLKSWAGEN AIR SERVICE” AO, performing flight with flight number WGT62N, at a minimal horizontal distance at 0.9 nm at same FL 370. Later on the unidentified unknown aircraft established radio communication with Sofia ACC FS Varna West and it was identified as Embraer 170 aircraft, registration marks SP-LDK, performing flight with flight number LOT7293 of „LOT” AO

Investigation of a serious incident realized on 11.02.2015 with F2000 aircraft, registration nr. LZ-OOI, upon takeoff from Sofia Airport

On 11.02.2015 aircraft FALCON 2000, registration marks LZ–ООІ, operated by the air operator  “Aviodetachment 28”, takes off from Sofia Airport for the performance of flight BGF 004 on route SOF-BRU. After takeoff, the left main stand of the landing gear (L/G) does not retract. The crew fulfills the relevant control card and drops down the L/G, then takes a decision for spending a part of the fuel and landing at Sofia Airport. Two approaches are carried out for visual check from the ground of the L/G position and landing is carried out normally. There are not any consequences for the passengers, the crew and the aircraft

Investigation of an aviation event, realized on 02.08.2015 with helicopter R22 BETA, without registration marks, operated by its owner, in the land domain of Uzundzhovo village, Haskovo district     

On 02.08.2015 at about 11.00 a.m. in the land domain of Uzundzhovo village, Haskovo district, upon its try to take off from an unregulated temporary flight platform, helicopter R22 BETA, without registration marks, undergoes a crash. Two persons without capability to operate the helicopter are found onboard, the one of them, occupying the left seat, has piloted the helicopter. The persons are not injured but the helicopter is destroyed

Investigation of an aviation accident, realized on 27.07.2015  with aircraft P92-JS, registration marks LZ-DBV, in the region of Dolna Banya airfield

On 27.07.2015 aircraft P92-JS, registration marks LZ-DBV, operated by “Ratan” OOD Aviation Training Center, takes off from RWY 27 at Dolna Banya airfield for the performance of a training flight. After the takeoff, between the first and the second bend, the instructor simulates an engine failure, upon the selection of a platform for forced landing and landing simulation, the aircraft lands in an unmowed meadow suffering substantial damages. The instructor and the trained pilot leave the aircraft without having got any injuries