Bhoja Air Flight crashes on final approach to Islamabad Airport.

[longbrained]

As per my post above, Boeing had issued a notification for the pilots of all B737 belonging to all series including this one to use caution and monitor air speed during landings and not using auto landing or autothrottle if there is discrepancies between altimeter readings. Any ways another reason to use Airbus.

 

[VCheng]

Windshear is something else I think. It is horizontal wind.

Downwind is basically when a plane passes below a cloud, a cumulonimbus cloud to be exact, high pressure from top forces the plane down, hence the large impact force.

Windshear is much more than just horizontal; it can have a majority vertical component too:

Wind shear itself is a microscale meteorological phenomenon occurring over a very small distance, but it can be associated with mesoscale or synoptic scale weather features such as squall lines and cold fronts. It is commonly observed near microbursts and downbursts caused by thunderstorms, fronts, areas of locally higher low level winds referred to as low level jets, near mountains, radiation inversions that occur due to clear skies and calm winds, buildings, wind turbines, and sailboats. Wind shear has a significant effect during take-off and landing of aircraft due to their effects on control of the aircraft, and has been a sole or contributing cause of many aircraft accidents.

 

[longbrained]

Autopilot is not in use on final approach in those weather conditions.

Well it appears it is not necessary to even use autopilot for this malfunction to occur since even autothrottle can cause the same problem as per Boeing notification. The error basically shuts down the engines causing rapid stall and loss of altitude.

 

[VCheng]

Well it appears it is not necessary to even use autopilot for this malfunction to occur since even autothrottle can cause the same problem as per Boeing notification. The error basically shuts down the engines causing rapid stall and loss of altitude.

Autothrottle is not used during final approach either.

The plane is not to blame in this case but likely weather.

 

[Jango]

Windshear is much more than just horizontal; it can have a majority vertical component too:

I meant that windshear incorporates all kinds of winds, mostly horizontal. But Downwind is specific. Downwind is another branch of windshear.

Thanks anyways.

 

[Safriz]

^^^^But none of this explains plane losing contact with ATC..not sending distress signal and catching fire before impact.

 

[Jango]

Well it appears it is not necessary to even use autopilot for this malfunction to occur since even autothrottle can cause the same problem as per Boeing notification. The error basically shuts down the engines causing rapid stall and loss of altitude.

Even if the engine shuts down, and the plane is 3km away from runway, it can glide and make a CFIT, which is definitely not the case ere.

 

[VCheng]

I meant that windshear incorporates all kinds of winds, mostly horizontal. But Downwind is specific. Downwind is another branch of windshear.

Thanks anyways.

No.

Downwind is defined as "the direction in which the wind is blowing". It has nothing to do with windshear.

 

[Trisonics]

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koral chowk rawalpindi - Google Maps

The plane was in Line with the Runway apparently....so it can be assumed that the pilots were alive and conscious,and had some sort of control on the plane.
The crash site is hardly 3 Km from Runway,so the plane must have been at very low altitude at that point and landing gear must be down.
TC report that the plane had lost contact about 40-50 minutes before Crash....
Parts of fuselage have been shown on the TV and they bear visible signs of a fire..
Two engines were shown on TV,and had no signs of fire although its hard to say by just seeing a few seconds of footage recorded in low light..But both engines are not Buried in the ground and did not make a crater,but were crumbled due to impact.....Still partially intact though.
The Flight data recorder was heavily dented but had no signs of fire,and had impact damage.

What can we assume from all these observations?

It's hard to imagine that a plane flying so low can just fall out of the sky. The culprit may be a high tension wire which would have definitely caused the plan to break up and fall to the ground. Speculation of course...but at a lower altitude and since the plane was already lined up to land was probably cruising or slowing down..so much destruction can only point to some sort of break up in the air .. assuming it was only a few miles from the landing strip as some here have suggested. A bomb can still not be ruled out IMHO.

 

[Jango]

^^^^But none of this explains plane losing contact with ATC..not sending distress signal and catching fire before impact.

plane lost contact with ATC once it crashed, not before. Plane was on finals, and you don't normally talk alot with the ATC once you have been cleared and are on finals, unless you want to abort though.

Distress signals not being issued is not much of an issue either. This low, the pilot has very little time to make a call.

No.

Downwind is defined as "the direction in which the wind is blowing". It has nothing to do with windshear.

Headwind, crosswind, tailwind, downwind.

 

[longbrained]

Autothrottle is not used during final approach either.

The plane is not to blame in this case but likely weather.

You do not know anything. Infact autothrottle is commonly used during landing to decrease the work load on pilot. Weather can not be a sole factor since it almost never is in aircraft crashes. Extremely rarely a crash is solely blamed on weather. Do not try to protect Boeing here since you have an American flag on your avatar. If it was Boeing's fault then we will have to sue it.

Even if the engine shuts down, and the plane is 3km away from runway, it can glide and make a CFIT, which is definitely not the case ere.

Well in the Turkish case it did not despite the plane being just a kilometer away. The plane just stalled: http://en.wikipedia.org/wiki/Turkish_Airlines_Flight_1951

 

[Donatello]

Let's remember the departed souls in prayers and refrain from posting BS on the aircraft.

Accidents happen in all parts of the world. If there is a due case of negligence to be found in investigations, it should be dealt as such.

 

[Jango]

You do not know anything. Infact autothrottle is commonly used during landing to decrease the work load on pilot. Weather can not be a sole factor since it almost never is in aircraft crashes. Extremely rarely a crash is solely blamed on weather. Do not try to protect Boeing here since you have an American flag on your avatar. If it was Boeing's fault then we will have to sue it.



Well in the Turkish case it did not despite the plane being a kilometer away. The plane just stalled.

oh come on now.

A crash does not happen for one reason.

There are multiple events in a chain sequence, starting from the departure to landing/finals.

Well in the Turkish case it did not despite the plane being just a kilometer away. The plane just stalled: Turkish Airlines Flight 1951 - Wikipedia, the free encyclopedia

Different conditions, different results.

 

[Safriz]

It's hard to imagine that a plane flying so low can just fall out of the sky. The culprit may be a high tension wire which would have definitely caused the plan to break up and fall to the ground. Speculation of course...but at a lower altitude and since the plane was already lined up to land was probably cruising or slowing down..so much destruction can only point to some sort of break up in the air .. assuming it was only a few miles from the landing strip as some here have suggested. A bomb can still not be ruled out IMHO.

But bomb blasts normally happen at high altitude to cause maximum damage,and if that had happened the Debris must have been strewn across tens of miles.
This one is limited to a square kilometer.

 

[longbrained]

oh come on now.

A crash does not happen for one reason.

There are multiple events in a chain sequence, starting from the departure to landing/finals.



Different conditions, different results.

Yeah but I was just saying the similarity between this case and the Turkish plane case and both happened in poor weather. Nothing more.