VT-ANB
12 June 2025 13:13
Aircraft ready to depart, requested pushback and engine start from bay 34
12 June 2025 13:14
Air traffic control approves aircraft to be pushed back and to prepare for Engine startup
12 June 2025 13:16
Air Traffic Control approves Engine Startup
12 June 2025 13:19
ATC Queried if the aircraft would need full length of the runway, Aircraft confirmed that they required the full length of Runway 23
12 June 2025 13:25
Aircraft requested taxi clearance to Runway 23, which was granted by ATC
12 June 2025 13:32
Aircraft radio was transferred to the Control Tower from Ground Control
12 June 2025 13:33
Control tower requested Air India aircraft backtrack on runway 23 via Taxiway R4, and to lineup and wait on runway 23
12 June 2025 13:37
Flight 171 cleared for departure runway 23.
12 June 2025 13:37
Aircraft began takeoff roll on runway 23.
12 June 2025 13:38
V1 reached, aircraft now committed to becoming airbourne
12 June 2025 13:38
Aircraft became airborne after 62-second takeoff roll.
12 June 2025 13:38
Normal climb established under light winds and good visibility.
12 June 2025 13:38
Switches where moved from RUN to CUT OFF 1 second apart. Both engines Immediatley begin to shutdown and stop producing thrust, and therefore they lose climb power.
12 June 2025 13:38
RAT Seen deployed
12 June 2025 13:38
ADS-B recorded ~625 ft AMSL peak altitude.
12 June 2025 13:38
Engine 1 cut off switch manually moved to RUN
12 June 2025 13:38
APU Inlet door, consistant with the APU starting opens.
12 June 2025 13:38
Engine 2 cut off switch manually moved to RUN
12 June 2025 13:38
Aircraft deviated from expected climb profile.
12 June 2025 13:39
Engine 1 EGT was observed to be rising for both engines indicating deceleration had stopped and the engine was attempting to spool up.
Engine 2 EGT was also rising, and was therefore relit, but the core deceleration could not be stopped.Fuel was repeatably re-introduced to attempt recovery
12 June 2025 13:39
Pilot contacted ATC to report "No Thrust"
12 June 2025 13:39
Rapid descent with lateral oscillations observed.
12 June 2025 13:39
Tree strike within B. J. Medical College campus. These trees where 293ft before the aircraft hit Building A
12 June 2025 13:39
Tail struck campus mess building causing breakup. Aircraft hit Building A with a nose up altitude of 8 degress, impacting the building with the trailing edge of the wingbox, just aft of the wing root structure.
12 June 2025 13:39
Structural disintegration and empennage separation.
12 June 2025 13:39
Debris field extended ~300 x 120 metres.
12 June 2025 13:39
Multiple structures ignited.
12 June 2025 13:39
Airport CCTV recorded abnormal climb and descent.
12 June 2025 13:39
Aircraft observed descending with instability.
12 June 2025 13:39
Fire and smoke confirmed at impact site.
12 June 2025 13:45
Fire and rescue services deployed to the crash site immediately following confirmation of impact.
12 June 2025 13:50
Systematic search and rescue operations commenced for survivors and casualties.
12 June 2025 14:10
Security perimeter established and access restricted for authorised personnel only.
12 June 2025 16:00
Investigation teams began systematic mapping of debris distribution and impact footprint.
12 June 2025 18:30
Preliminary assessment of building damage and aircraft breakup sequence initiated.
13 June 2025 09:00
Cockpit Voice Recorder (CVR) and Flight Data Recorder (FDR) successfully recovered.
13 June 2025 12:00
Initial data extraction and preservation procedures commenced at investigation laboratory.
14 June 2025 10:00
Both engines transferred for detailed metallurgical and mechanical analysis.
15 June 2025 11:30
Investigation into control surface integrity and actuator response conducted.
16 June 2025 14:00
Examination of navigation, flight control, and onboard computer systems initiated.
20 June 2025 10:00
Initial findings indicate abnormal flight profile following takeoff and climb phase.
22 June 2025 15:00
Reconstruction confirms uncontrolled descent following climb phase anomaly.
10 July 2025 10:00
Draft version of investigation report completed for internal review.
25 July 2025 09:00
Final investigation report officially released to public and regulatory authorities.