Sun Way Flight 4412

Sun Way Flight 4412
An Ilyushin Il-76TD similar to the crashed aircraft
Accident
Date 28 November 2010
Summary In-flight engine fire due to metal fatigue[1]
Site Karachi, Pakistan
Aircraft
Aircraft type Ilyushin Il-76TD
Operator Sun Way
Registration 4L-GNI
Flight origin Jinnah International Airport, Karachi, Pakistan
Destination Khartoum International Airport, Sudan
Passengers 0
Crew 8
Fatalities 12 (8 on board + 4 on the ground)
Survivors 0

Sun Way Flight 4412 was an international scheduled cargo flight from Jinnah International Airport in Karachi, Pakistan to Khartoum International Airport in Sudan. On 28 November 2010, the Sun Way Ilyushin Il-76 operating the flight crashed while attempting to go back to Jinnah International Airport after one of the starboard engines caught fire. Twelve people were killed in the crash, including everyone on board the aircraft and four people on the ground.

Aircraft

The aircraft involved was an Ilyushin Il-76TD, registration 4L-GNI,[2] that was being operated by Sun Way, a Georgian cargo airline.[3] The aircraft was reported as having undergone a thorough technical inspection in the two weeks prior to the accident.[2]

Accident

Sun Way Flight 4412 departed Jinnah International Airport at 01:48 local time (20:48 UTC, 27 November) bound for Khartoum International Airport. The Ilyushin Il-76TD was carrying 31 tonnes of relief supplies for Sudan,[2] reported to be a cargo of tents.[4] Eyewitnesses saw that one of the starboard engines was on fire as the aircraft climbed out of Jinnah. The crew attempted to return to Jinnah, but the aircraft crashed on approach to runway 07R.[2] The aircraft crashed into buildings under construction at a housing complex for the Pakistan Navy, setting several of them on fire.[5] Rescue authorities confirmed that four people were killed that were not on board the aircraft.[2] The pilot was a Russian, whilst the other seven crew were Ukrainian.[4] The short wreckage trail is indicative of a stall, with the aircraft crashing with little forward speed.[2]

The force of the explosion was so great that local residents thought that a bomb had exploded.[6] The ground casualties were reported to be construction workers.[7] The site of the crash was near where a Pakistani twin-engine turboprop crashed after take-off from Karachi three weeks previously, killing all 21 people on board.[8]

Nationalities of victims

Nationality Fatalities Total
Crew On Ground
Ukraine Ukrainian 7 0 7
Pakistan Pakistani 0 4 4
Russia Russian 1 0 1
Total 8 4 12

Investigation

The Civil Aviation Authority of Pakistan opened an investigation into the accident.[7] It was speculated that a bird strike may have caused the fire in the engine.[4]

The investigation determined that the cause of the accident was a fatigue fracture leading to the uncontained failure of the 2nd stage disk of the low-pressure compressor of engine number four. This resulted in an in-flight fire and damage to adjacent areas of the right wing and flaps to the extent that flight could not be sustained. The fatigue fracture formed due to the operation of the engine beyond its manufacturer’s assigned lifespan without assessment and lifespan enhancement by the manufacturer.[9]

References

  1. ↑ Hradecky, Simon. "Crash: Sun Way IL76 at Karachi on Nov 28th 2010, uncontained engine failure and engine fire". The Aviation Herald. Retrieved 14 January 2017.
  2. 1 2 3 4 5 6 Hradecky, Simon. "Crash: Sun Way IL76 at Karachi on Nov 28th 2010, engine fire". The Aviation Herald. Retrieved 28 November 2010.
  3. ↑ "Sun Way." Aviation Safety Network. Retrieved 29 November 2010.
  4. 1 2 3 Авиакатастрофа в Пакистане унесла жизни россиянина и 7 украинцев (in Russian). Rian. Retrieved 28 November 2010.
  5. ↑ "Cargo plane crashes in Karachi residential area". Reuters. 28 November 2010. Retrieved 28 November 2010.
  6. ↑ "Vrachtvliegtuig crasht in woonwijk Pakistan". De Telegraaf (in Dutch). Retrieved 28 November 2010.
  7. 1 2 "Plane from Karachi crashes with eight people on board". BBC News. 28 November 2010. Retrieved 28 November 2010.
  8. ↑ "Cargo plane crashes in Karachi". The Express Tribune. Retrieved 28 November 2010.
  9. ↑ http://www.caapakistan.com.pk/Upload/SIBReports/SIB-IL-76.pdf

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