Posted on 01/21/2015 11:06:32 AM PST by Gideon7
Warning alarms can be heard "screaming" on the cockpit voice recorder of AirAsia Flight 8501 before it crashed, an investigator was quoted as saying Wednesday.
Among the audible alerts is one that indicated the plane is stalling, the investigator told Agence France-Presse (AFP) and the Wall Street Journal. NBC News was immediately unable to confirm the accounts.
The reports come a day after Indonesia's transport minister said the Airbus A320, which crashed last month with 162 people on board, was climbing at an abnormally high rate before it plunged and disappeared from radar.
"The warning [alarms] kept on screaming, and in the background, they [the pilot and co-pilot] were trying to recover the plane," the unidentified investigator told the WSJ. "But what they said wasn't clear." He added that the flight data recorder also indicated that stall warnings were going off.
AFP reported the same claims, citing an investigator from Indonesia's National Transportation Safety Committee, adding that the pilots' voices were drowned out by the sound of the alarms.
Minister Ignasius Jonan told Parliament on Tuesday that radar data showed the doomed jet was climbing at about 6,000 feet a minute before it disappeared on December 28. "It is not normal to climb like that, it's very rare for commercial planes, which normally climb just 1,000 to 2,000 feet per minute," he said. "It can only be done by a fighter jet."
What, no pitot tube heater?
Yes, pitot heat was on. It is automatically on. You have to turn it off manually.
Icing can be severe enough to defeat it.
There are also certain types of icing, that form larger chunks, that are more difficult to melt.
A stall would not result in an out of control tumble. It would be a nose over and maybe a yaw where the plane would still be moving forward, albeit in a dive instead of level flight. As soon as the plane reached flying speed, the pilot could level the plane out.
Yes.
If they had sat on their hands for about 50 seconds, all of the readings would have returned to normal, as the heaters and conditions overcame the icing.
However, the airplane would have remained in Alternate Law.
It will not go back to Normal Law until there is weight on the wheels, iirc.
I believe they would have been able to use the autopilot again after troubleshooting the problem per the checklist.
I hate to ask this, but don’t you get the feeling that Boeing’s planes are made better to withstand these unusual forces of nature. The new Boeing love to fly. Am I wrong that we don’t see this sort of thing in Boeing’s planes?
Spin recovery — opposite rudder and push the nose down. Wonder if that works on a heavy jet?
That makes sense.
I would say that training is the most important factor, a poorly trained pilot is going to do any better in a Boeing than an Air Bus...
Fly by wire, die by wire.
Give me Boeing, or I ain’t going.
I’m beginning to think that the plane cracked up as posted here by others.
Bad thunder bumpers possibly did structural damage resulting in loss of control . Out of control at high speed & elevation big bird broke up. Plummeting into sea. So says thing old not bold former U.S. navy cargo pilot.
The modern age is the cause.
Aircraft use pitot tubes to measure airspeed.
http://en.m.wikipedia.org/wiki/Pitot_tube
I had to look that up. I kept thinking it said “pilot tube”
I’m saying assuming that something physically happened to the plane itself in the storm.
One would think so. Let’s borrow a 747 and , uh, give it a spin.
I recall a show about the investigation into the AA flight that crashed in Queens 2 months after 911.. They hit wake turbulence from a 747 that took off ahead of them. Trying to get out of it they cranked on the tail rudder, per training, and broke the whole tail off crashing the plane.
Any airplane that can be damaged by crew induced control input is a BAD DESIGN....This over control BS was used to protect Airbus.
Airbus seems to have a inherent design problem.
I’d be curious as to the(pitch)attitude of the aircraft as it was climbing at 6000FPM. FDR show be able to show that data.
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