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- Feb 22, 2021
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First saw this on the Aviation Herald website.
When you lose either the Y or G hydraulics system, you need to turn off the PTU ( power transfer unit ) or you will overheat the other system and cause it to fail, which it did.
Loss of G + Y Hydraulics, is very serious on the A321.
No auto pilot, no reverse thrust, no flaps ( much faster landing speed ), no yaw damper, flight protections lost ( alternate law ), loss of spoilers, no anti skid ( much longer landing distance ) , loss of nose wheel steering .
Not sure I buy the reason why they never turned off the PTU.
Edit: They also had a “ avionics smoke “ caution.
Never heard of a landing so hard it resulted in the crew putting their oxygen mask on after.
Also, they already had the flaps extended when they lost the second hydraulic system which still allowed them to land with flaps versus had the dual hydraulics failure happened while in clean configuration.
When you lose either the Y or G hydraulics system, you need to turn off the PTU ( power transfer unit ) or you will overheat the other system and cause it to fail, which it did.
Loss of G + Y Hydraulics, is very serious on the A321.
No auto pilot, no reverse thrust, no flaps ( much faster landing speed ), no yaw damper, flight protections lost ( alternate law ), loss of spoilers, no anti skid ( much longer landing distance ) , loss of nose wheel steering .
Not sure I buy the reason why they never turned off the PTU.
Edit: They also had a “ avionics smoke “ caution.
Never heard of a landing so hard it resulted in the crew putting their oxygen mask on after.
Also, they already had the flaps extended when they lost the second hydraulic system which still allowed them to land with flaps versus had the dual hydraulics failure happened while in clean configuration.
Nordwind A321 executed go-around with over 100 system failures after hard landing
Russian investigators have detailed the serious damage inflicted on a Nordwind Airbus A321 by a hard landing at Antalya, after which the crew executed a go-around despite the aircraft's being crippled. Over 100 failures were recorded by the ACARS communications system after the twinjet -...
www.flightglobal.com
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