PIA ATR Flight PK-661 Crashes Near Havelian

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TAILWIND
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Re: PIA ATR Flight PK-661 Crashes Near Havelian

Post by TAILWIND »

t-rehman wrote: Fri Nov 27, 2020 1:31 am Do we have any volunteer who can translate the report in layman's language?

The operation of turbo prop is not as simple as it seems. I guess its not throttle forward - more power, throttle backward - less power. The blade pitch angle is playing a very important role here

Would appreciate if somebody can assist in understanding the jargons involved (blade pitch / propeller speed etc). Thanks
Yes you are right, Turboprop controls are different to a turbojet. There are two controls (levers) for each engine.
First is called Condition Lever, It controls the prop RPM, feather control and on some designs a fuel cut-off position if there is no separate control for fuel cut off. For RPM there is usually a separate ground and flight idle detent. Beyond flight idle, pilot can select any RPM upto max RPM in flight. Usually for take off and landing, max rpm is selected and for cruise, a lower RPM can be set.
Condition lever also has a feather position, for manual feathering if required. PLease note that condition lever DOES NOT change the power of the engine. That is achieved through power lever, explained below.
Second control is called Power Lever. During flight pilot uses this to control the engine thrust for various phases of flight. Once condition lever has been positioned at max or cruise position (in flight or ground), movement of the power lever changes the pitch of the prop , lever forward, more pitch , more bite hence more power, lever back, flatter pitch less bite, less power.
Power lever also has Reverse Pitch position for thrust reverse during landing.
In one of innovative designs in TBM950, (a single engine 6 seater turboprop) a single lever has been used to achieve all three finctions, i.e fuel cut off, idle control and power.
Hope it makes sense


t-rehman
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Re: PIA ATR Flight PK-661 Crashes Near Havelian

Post by t-rehman »

Thanks alot TAILWIND. Really appreciate

It is really disappointing that SIB did not release the CVR transcripts.

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Abbas Ali
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Re: PIA ATR Flight PK-661 Crashes Near Havelian

Post by Abbas Ali »

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Sindh High Court has directed PIA to submit replies to questions raised by plaintiff in his documents presented in the court.

Next hearing of the case will take place on January 18.

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Abbas Ali
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Re: PIA ATR Flight PK-661 Crashes Near Havelian

Post by Abbas Ali »

AAIB investigation report is based on assumptions, says Pakistan CAA

Aircraft Accident Investigation Board (AAIB) investigation report on December 7, 2016, PIA ATR crash near Havelian is based on assumptions and overlooks multiple technical details, says a report submitted by Pakistan Civil Aviation Authority (CAA) to Sindh High Court on December 17.

https://tribune.com.pk/story/2276392/re ... ptions-caa

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Vaqar Khan
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Re: PIA ATR Flight PK-661 Crashes Near Havelian

Post by Vaqar Khan »

The plane that was destined to crash. Mini air crash investigation.


ammad
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Re: PIA ATR Flight PK-661 Crashes Near Havelian

Post by ammad »

Vaqar Khan wrote: Sat Jan 09, 2021 7:19 pm The plane that was destined to crash. Mini air crash investigation.

Really felling sad for the passengers and for Crew. Very dangerous situation in which crew were put in to operate and handle the Aircraft.

Left wing shot up and Aircraft roll before crash was very scary situation.
Fortune favours brave.

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Abbas Ali
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Re: PIA ATR Flight PK-661 Crashes Near Havelian

Post by Abbas Ali »

Plaintiff was unable to attend PIA ATR engine incidents/accidents case hearing at Sindh High Court on January 18.

A PIA official was unable to attend court proceedings due to office shifted to Islamabad.

Next hearing of the case will take place on February 9.

Officials including Pakistan CAA Director Technical have been directed by the court to ensure their presence in next hearing of the case.

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Flyer1015
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Re: PIA ATR Flight PK-661 Crashes Near Havelian

Post by Flyer1015 »

Abbas Ali wrote: Tue Jan 19, 2021 6:37 pm Plaintiff was unable to attend PIA ATR engine incidents/accidents case hearing at Sindh High Court on January 18.

A PIA official was unable to attend court proceedings due to office shifted to Islamabad.

Next hearing of the case will take place on February 9.

Officials including Pakistan CAA Director Technical have been directed by the court to ensure their presence in next hearing of the case.

Abbas
What does this mean office shifted to Islamabad? Did he not know he had a court date on Jan 18 and traveled accordingly?

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Abbas Ali
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Re: PIA ATR Flight PK-661 Crashes Near Havelian

Post by Abbas Ali »

According to news sources:

Today, a former Deputy Chief Engineer PIA challenged flight PK661 crash official investigation report in Sindh High Court.

The former PIA employees claims:

* The ill-fated aircraft ATR 42-500 registration AP-BHO was flying with technical problem since year 2013.

* Record of technical problem in the aircraft exists.

* PIA management was timely informed about technical problem in the aircraft.

Sindh High Court has issued notices to PIA and Pakistan CAA to seek their reply.

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Tuti Fruiti
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Re: PIA ATR Flight PK-661 Crashes Near Havelian

Post by Tuti Fruiti »

How can courts decide why and how plane crashed?
Will judges decide themselves by watching a netgeo documentary or googling or they will seek an opinion from a competant aviation safety expert and give judgement.?
Either way, courts are not the right place to decide aviation technical matters..it can do more damage than any good.

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Re: PIA ATR Flight PK-661 Crashes Near Havelian

Post by Abbas Ali »

I give credit to Sindh High Court for issuing deadline to government authorities to get PK661 final investigation report released.

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A310
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Re: PIA ATR Flight PK-661 Crashes Near Havelian

Post by A310 »

Tuti Fruiti wrote: Thu Apr 15, 2021 8:45 pm How can courts decide why and how plane crashed?
Will judges decide themselves by watching a netgeo documentary or googling or they will seek an opinion from a competant aviation safety expert and give judgement.?
Either way, courts are not the right place to decide aviation technical matters..it can do more damage than any good.
And where do you go when the those who are to investigate and adjudicate ‘aviation technical matters’ are at fault and corrupt themselves?

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Re: PIA ATR Flight PK-661 Crashes Near Havelian

Post by gooner »

Tuti Fruiti wrote: Thu Apr 15, 2021 8:45 pm How can courts decide why and how plane crashed?
Will judges decide themselves by watching a netgeo documentary or googling or they will seek an opinion from a competant aviation safety expert and give judgement.?
Either way, courts are not the right place to decide aviation technical matters..it can do more damage than any good.
The court is not investigating the crash itself. That's already been done.
Instead they're questioning the people responsible for PIA's poor safety record. I really hope justice is served.