tirsdag 5. desember 2017

Overrun avoidance - Eurocontrol

Overrun avoidance means landing in the TDZ and immediate deceleration to taxi speed

On 5 June 2015, an aircraft landed long on a wet runway at Montréal and the crew then misjudged their intentionally-delayed deceleration because of an instruction to clear the relatively long runway at its far end and were then unable to avoid an overrun. The Investigation concluded that use of available deceleration devices had been inappropriate and that deceleration as quickly as possible to normal taxi speed before maintaining this to the intended runway exit was a universally preferable strategy. It was concluded that viscous hydroplaning had probably reduced the effectiveness of maximum braking as the runway end approached.

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The aircraft in its final stopping position
 
 
Here a very fresh example:
Incident: Thai A333 at Islamabad on Dec 4th 2017, overran runway on landing
 
A Thai Airways Airbus A330-300, registration HS-TES performing flight TG-349 from Bangkok (Thailand) to Islamabad (Pakistan), landed on Islamabad's runway 30 at 22:20L (17:20Z) but overran the end of the runway and came to a stop on the paved surface of the runway end safety area a few meters past the runway end (and about 280 meters from the displaced threshold runway 12). There were no injuries and no damage.

Pakistan's CAA reported the aircraft needed to be pushed back about 20 minutes after landing.

The aircraft reached the gate about 40 minutes after landing and was able to depart for the return flight TG-350 with a delay of about 50 minutes about 2 hours after landing.

Metars:
OPRN 041900Z 00000KT 5000 HZ NSC 10/04 Q1017.0/30.03=
OPRN 041800Z 00000KT 5000 HZ NSC 11/05 Q1016.7/30.02=
OPRN 041700Z 00000KT 5000 HZ NSC 11/05 Q1016.4/30.01=
OPRN 041600Z 00000KT 5000 HZ NSC 13/05 Q1016.1/30.01=
OPRN 041530Z 00000KT 6000 HZ NSC 13/07 Q1016.0/30.00=
OPRN 041500Z 31004KT 6000 HZ NSC 13/07 Q1015.5/29.99=
OPRN 041400Z 31004KT 6000 HZ NSC 15/07 Q1015.1/29.97=



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