[CONSOLIDATED] Air India plane crashes at India's Ahmedabad airport

[Mystyque]

Cutoff fuel at that low altitude is gone case liao... cos there is not enough time for the engines to restart and generate thrust needed to avoid crashing to ground.

I believe it isn’t necessary fatal if corrective action taken immediately. The problem seems to be the pilots didn’t rectify until 10+ seconds later. By then, the engines would need far more time to spool up to sufficient speed.

 

[laksamaihum]

wah piang it’s like the standard helpdesk response have you tried turning it off and on again?

limpeh read this news really won’t dare take scoot flight liao unless days are numbered and with maximum travel insurance payout

 

[mocax]

how come air india become SIA? no head no tail...

 

[tmkedmw]

I believe it isn’t necessary fatal if corrective action taken immediately. The problem seems to be the pilots didn’t rectify until 10+ seconds later. By then, the engines would need far more time to spool up to sufficient speed.

Don't think so. The cutoff was at 3 secs and 4 secs after liftoff. At such low altitude, even if the switch moves back to run within a humanly few seconds, there just isn't enough time to spool enough thrust.
They can always verify using simulator.

 

[SpecialKeyboardService]

https://aviationweek.com/air-transp...a-787-had-fuel-supply-cut-pilot-investigators

U can’t sue sia like mi185. U most likely kena pogba by mot only

 

[SpecialKeyboardService]

I read the article. It say pilot 1 told 2 why cut off. 2 deny.

If pilot 1 is talent surplus, the local media will say new zealand pilot fked up and the pilot 1 is a hero to call him out

If pilot 2 is the talent surplus, they dun dare to release it cos the local media will call ntsb, boeing and air india racist.

IYKYK

 

[covidneg]

Damn it. The lie killed so many people.


For the Boeing 787 Dreamliner, after fuel cutoff on the engine (for example, by selecting the fuel control switch to "CUTOFF" and then returning it to "RUN"), the fuel flow to the engine resumes almost immediately once the fuel control switch is turned back on.


Details:

• The Boeing 787 uses electronic engine control (FADEC: Full Authority Digital Engine Control).
• When the fuel control switch is moved from "CUTOFF" to "RUN," the FADEC commands the fuel metering unit to restore fuel flow to the engine.
• The response time is typically less than 1 second—the fuel flow resumes almost instantly, limited mainly by the physical movement of the valve and the system electronics.
• If you are doing a fuel cut-off and then re-introducing fuel (for example, during an in-flight engine restart or on the ground), the system is designed for rapid resumption of fuel flow as soon as the command is given.

Important notes:

• While fuel flow resumes almost instantly, the time to achieve stable engine operation (such as relight and acceleration to idle) will depend on the specific phase (in-flight, ground, engine temperature, altitude, airspeed, etc.).
• For a normal ground start, relight from fuel-off to light-up is typically a few seconds, but this includes spool-up and ignition, not just fuel delivery.

Summary Table:

Action	Fuel Flow Resumption Time
Fuel Control to RUN	< 1 second (almost instant)
Engine stable relight/idle	Several seconds (depends on conditions)

Sources:

• Boeing 787 QRH, FCOM
• Rolls-Royce Trent 1000 / GEnx Engine Manual
• General FADEC/Engine System Design Principles

 

[klim668]

Why would anyone want to do that? Suicide? Makes no sense at all. Now pilots died liao they say anything also can. Dead men tell no tales.

 

[lalalalalala]

Means auto off?

no, he say not possible that it auto off, it has to be deliberately turned on or off. is basically the kind of switch where you have to pull the spring up and set it.

he also say there is not configuration where the fuel is set to cutoff permanently. if dual engine fail, you set it to cutoff, and set it back to on

also i think most importantly he say you don't touch anything until the plane fully takeoff even if 1 engine fail. sth about take off altitude of 1000ft before you reconfigure the plane for emergency.

imo they likely crash because they see engine failure and go and touch the controls while the plane is still taking off. although i don't even know why they set both switches to cutoff and leave it there. planes need speed to control, if the plane is not moving there is no way to control it

 

[waiken]

how come air india become SIA? no head no tail...

ask their minister lo

 

[waiken]

these toggle switches not easy to knock into off position need pull up then can switch

 

[tmkedmw]

imo they likely crash because they see engine failure and go and touch the controls while the plane is still taking off. although i don't even know why they set both switches to cutoff and leave it there. planes need speed to control, if the plane is not moving there is no way to control it

Not correct.
Blackbox no indication of engine failure.
It's the moving of fuel switch to cutoff that stops fuel to the engines that caused the loss of lift, resulting in the crash.

Posted below before ...

The design of the switch prevents an accidental bump from moving it from run to cutoff
Deliberate action needed.
See pic below

 

[newborn1000]

However, it notes that the United States’ Federal Aviation Administration (FAA) issued a Special Airworthiness Information Bulletin (SAIB) on Dec 17, 2018, regarding “the potential disengagement of the fuel control switch locking feature”.



https://www.straitstimes.com/asia/f...ake-off-preliminary-report-of-air-india-crash

So actually hor , some of the planes may have this issue , so maybe really accidentally hit it lols

 

[Hyruga]

Press wrong button lo

 

[fandango]

Who can they sue?

 

[titusilvering]

What’s the reason that he cut off the fuel is impt.

Suicide or no license

 

[waiken]

got hear terrain pull up bo? maybe claim act of god cannot compensate

 

[dexboi]

off and on again to restart.

 

[waiken]

too low restart likely engine no thrust to lift

 

[Chalkycliffs]

how come air india become SIA? no head no tail...

SIA is minority shareholder.