Latest news with #DreamlinerVT-ANB
Deccan Herald
a day ago
- Deccan Herald
Air India replaced module in cockpit in crashed Dreamliner following Boeing directive
TCM includes fuel control switches, which have come to focus in the ongoing probe into the fatal crash as these switches were cut off immediately after takeoff of the ill-fated London-bound Dreamliner VT-ANB that crashed in Ahmedabad on June 12.
New Indian Express
a day ago
- Automotive
- New Indian Express
Air India replaced module in cockpit in crashed Dreamliner following Boeing directive
NEW DELHI: Air India replaced the Throttle Control Module (TCM) of the crashed Boeing 787-8 plane twice in the last six years following a directive from Boeing in 2019, according to sources. TCM includes fuel control switches, which have come to focus in the ongoing probe into the fatal crash as these switches were cut off immediately after takeoff of the ill-fated London-bound Dreamliner VT-ANB that crashed in Ahmedabad on June 12. The replacement of the TCM twice -- in 2019 and 2023 -- was mentioned in the Aircraft Accident Investigation Bureau's (AAIB) preliminary probe report into the crash that was released on Saturday. It also said the TCM replacement was not linked to the fuel control switches. The sources told PTI on Sunday that a revised maintenance planning document (MPD) was issued by Boeing for all the operators of the Dreamliners in 2019. As per the MPD, the operators have to change the TCM, which includes the fuel control switches, every 24,000 flight hours, the sources said. Since 2019, when the MPD was issued, the source said Air India changed the TCM in the ill-fated aircraft twice -- in 2019 and 2023. Queries to the Air India remained unanswered. Specific details about the MPD could not be immediately ascertained.
Time of India
2 days ago
- Automotive
- Time of India
Air India replaced module in cockpit in crashed Dreamliner following Boeing directive
Air India replaced the Throttle Control Module (TCM) of the crashed Boeing 787-8 plane twice in the last six years following a directive from Boeing in 2019, sources said on Sunday. TCM includes fuel control switches, which have come to focus in the ongoing probe into the fatal crash as these switches were cut off immediately after takeoff of the ill-fated London-bound Dreamliner VT-ANB that crashed in Ahmedabad on June 12. The replacement of the TCM twice -- in 2019 and 2023 -- was mentioned in the Aircraft Accident Investigation Bureau's (AAIB) preliminary probe report into the crash that was released on Saturday. It also said the TCM replacement was not linked to the fuel control switches. by Taboola by Taboola Sponsored Links Sponsored Links Promoted Links Promoted Links You May Like When Knee Pain Hits, Start Eating These Foods, and Feel Your Pain Go Away (It's Genius) Read More Undo The source told PTI that a revised Maintenance Planning Document (MPD) was issued by Boeing for all the operators of the Dreamliners in 2019. As per the MPD, the operators have to change the TCM, which includes the fuel control switches, every 24,000 flight hours, the sources said. Live Events Since 2019, when the MPD was issued, the source said Air India changed the TCM in the ill-fated aircraft twice -- in 2019 and 2023. Queries sent to Air India remained unanswered. Specific details about the MPD could not be immediately ascertained. In response to questions sent to Boeing, a company spokesperson on Sunday referred to its statement issued on Saturday saying it will continue to support the investigation and Air India. "We will defer to the AAIB to provide information about AI171, in adherence with the UN International Civil Aviation Organization protocol known as Annex 13," the spokesperson said in the emailed statement. AAIB, in its report on Saturday, said that at this stage of investigation, "there are no recommended actions to B787-8 and/or GE GEnx-1B engine operators and manufacturers". Air India's Dreamliner VT-ANB, which crashed on June 12, was powered by GEnx-1B engines. According to the report, FAA issued Special Airworthiness Information Bulletin on December 17, 2018, regarding the potential disengagement of the fuel control switch locking feature. "This SAIB was issued based on reports from operators of Model 737 airplanes that the fuel control switches were installed with the locking feature disengaged. The airworthiness concern was not considered an unsafe condition that would warrant airworthiness directive by the FAA," it said. AAIB also said the fuel control switch design, including the locking feature, is similar on various Boeing airplane models including part number 4TL837-3D, which is fitted in B787-8 aircraft VT-ANB. "As per the information from Air India, the suggested inspections were not carried out as the SAIB was advisory and not mandatory. The scrutiny of maintenance records revealed that the throttle control module was replaced on VT-ANB in 2019 and 2023. "However, the reason for the replacement was not linked to the fuel control switch. There has been no defect reported pertaining to the fuel control switch since 2023 on VT-ANB," the report said. After being in cut-off mode, the fuel control switches of the aircraft's two engines were turned on later but the London-bound aircraft could not get enough thrust and altitude before it crashed into a building in Ahmedabad killing 260 people.
Mint
3 days ago
- General
- Mint
A Second-by-Second Timeline of How Air Indias Dreamliner Flight Ended in Disaster
New Delhi, Jul 12 (PTI) London-bound Air India flight AI171 crashed 32 seconds after takeoff from Ahmedabad on June 12, after fuel supply to both engines was cut off within a second of each other. A preliminary report found that the confused pilots were unable to restore thrust in time. Here is a look at the sequence of events leading to the deadly crash: 11:17 Hrs IST: Air India Dreamliner VT-ANB lands in Ahmedabad from New Delhi, operating as flight AI423 13:13:00 Hrs: Aircraft requests pushback and start up 13:13:13 Hrs: ATC approved pushback 13:16:59 Hrs: ATC approved start up. 13:18:38 Hrs: Aircraft departs from Bay 34 at Ahmedabad's Sardar Vallabhbhai Patel International Airport 13:19:12 Hrs: ATC queried if the aircraft required the full length of the runway. The aircraft confirmed the requirement of full length of Runway 23. 13:25:15 Hrs: Aircraft requests taxi clearance, which was granted by air traffic control (ATC) 13:26:00 Hrs: Aircraft taxis to Runway 23 via Taxiway R4, backtracked and lined up for take-off 13:32:03 Hrs: Aircraft transferred from ground to tower control 13:33:45 Hrs: Aircraft instructed to line up on the Runway 23 13.37:37 Hrs: ATC clears take-off from Runway 23 13.37:37 Hrs: Takeoff roll starts 13:38:39 Hrs: Liftoff from runway 13:38:42 Hrs: Maximum speed of 180 knots reached Immediately thereafter, both Engine 1 and Engine 2 fuel cutoff switches move from RUN to CUTOFF positions, one second apart. Engines begin to slow as fuel supply is cut off. Ram Air Turbine (RAT) deployed during the initial climb immediately after lift-off. One pilot is heard asking the other why he cut off fuel. The other answers that he has not done so 13:38:47 Hrs: Both Engine N1 and N2 drop below minimum idle speed. The RAT's pump begins supplying hydraulic power. 13:38:52 Hrs: Engine N1 fuel cutoff switch moves to RUN from CUTOFF 13:38:56 Hrs: Engine N2's fuel cutoff switch too rest to RUN Both engines relight, and Engine 1 begins to recover. Engine 2 is unable to reverse deceleration 13:39:05 Hrs: One of the two pilots issues a distress "MAYDAY, MAYDAY, MAYDAY" call 13:39:11 Hrs: Data recording from the aircraft stops 13:44:44 Hrs: Fire tenders leave airport premises for rescue and firefighting
Indian Express
3 days ago
- General
- Indian Express
How Air India's Dreamliner flight ended in disaster: A second-by-second timeline
A preliminary report into the crash of the Air India Boeing 787 Dreamliner in Ahmedabad that killed 260 people last month reveals that both of the aircraft's engines were starved of fuel almost simultaneously, just moments after takeoff. The findings, released Saturday by Indian aviation authorities, provide the most detailed account of the incident on June 12. Below is a second-by-second reconstruction of events leading up to the crash, based on the report: 11:17 am: Air India Dreamliner VT-ANB lands in Ahmedabad from New Delhi as flight AI423. 1:18:38 pm: The aircraft is observed departing from Bay 34 at the airport. 1:25:15 pm: The crew requests taxi clearance, which is granted by air traffic control. The aircraft begins taxiing toward Runway 23 via Taxiway R4, backtracks, and lines up for departure. 1:32:03 pm: The flight is transferred from ground control to tower control. 1:37:33 pm: Takeoff clearance is issued. 1:37:37 pm: The aircraft begins its takeoff roll. 1:38:39 pm: The aircraft lifts off. Investigators note that the air/ground sensors transition to air mode, consistent with liftoff. 1:38:42 pm: The aircraft reaches a maximum airspeed of 180 knots. Immediately after, both Engine 1 and Engine 2 fuel cutoff switches transition from 'RUN' to 'CUTOFF' positions, one after the other with a one-second gap. 'The Engine N1 and N2 began to decrease from their take-off values as the fuel supply to the engines was cut off.' One of the pilots is heard asking the other why did he cutoff. The other pilot responded that he did not do so. Airport CCTV footage shows the Ram Air Turbine (RAT) deploying during the initial climb, shortly after liftoff. 'The aircraft started to lose altitude before crossing the airport perimeter wall,' the investigation noted. 1:38:47 pm: Both engines' values drop below minimum idle speed. The RAT's hydraulic pump begins supplying hydraulic power. 1:38:52 pm: Engine 1's fuel cutoff switch is moved back from 'CUTOFF' to 'RUN.' 1:38:56 pm: Engine 2's fuel cutoff switch is similarly reset to 'RUN.' The probe report reads: 1:39:05 pm: One of the pilots issues a distress call: 'MAYDAY MAYDAY MAYDAY.' 1:39:11 pm: Data recording from the aircraft stops. 1:44:44 pm: Crash fire tenders leave the airport premises for rescue and firefighting efforts.
