Sky Lease Cargo Flight 4854

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Sky Lease Cargo Flight 4854
Sky lease 747 overrun CYHZ.jpg
N908AR, after overrunning Runway 14.
Occurrence
Date7 November 2018
Summary Runway overrun caused by pilot error compounded by fatigue
Site Halifax Stanfield International Airport
44.8825° N, 63.5152° W
Aircraft
Aircraft type Boeing 747-412F
Operator Sky Lease Cargo
IATA flight No.GG4854
ICAO flight No.KYE4854
Call signSKY CUBE 4854
Registration N908AR
Flight origin Chicago O'Hare International Airport
1st stopover Halifax Stanfield International Airport
Last stopover Ted Stevens Anchorage International Airport
Destination Changsha Huanghua International Airport
Occupants4
Passengers1
Crew3
Fatalities0
Injuries3 (Minor)
Survivors4

Sky Lease Cargo Flight 4854 was a flight served by a Boeing 747-412F that overran the runway on landing at Halifax Stanfield International Airport, Nova Scotia on November 7, 2018. The cause of the accident was attributed to pilot error and fatigue. The incident injured three of the four crew members.

Contents

Aircraft and flight

The aircraft involved in the accident in May 2014 while still in service with Singapore Airlines Cargo. 9V-SFF Boeing 744F Singapore Airlines Cargo (12221564966).jpg
The aircraft involved in the accident in May 2014 while still in service with Singapore Airlines Cargo.

N908AR was an American registered Boeing 747-412F (serial no. 28026) that served Flight 4854 on November 7, 2018. [1] The aircraft was delivered new to Singapore Airlines Cargo and registered as 9V-SFF, before Sky Lease Cargo acquired it in April of 2017. [2] [3] The aircraft did not have any cargo aboard. There was a crew of 3 and 1 passenger, an off-duty captain who was deadheading. [4] Flight 4854's route took it from Chicago O'Hare Intl. Airport to Halifax Stanfield Intl. Airport, where it would onload cargo. [5] It would continue to Ted Stevens Anchorage International Airport to refuel and change crews and depart for its final destination of Changsha Huanghua International Airport. [6]

Incident

The crew flew the instrument landing system (ILS) approach for runway 14. Eighty-one seconds from the runway threshold, the pilots noticed a tailwind. [4] The crew continued the approach without recalculating the performance data to confirm that the stopping distance was sufficient, possibly because they had only a short time before landing. The tailwind they encountered increased the 747's stopping distance, but the distance still did not exceed the length of the runway.

The plane touched down at 5:06 am Atlantic Standard Time in darkness. After touching down, the throttle for engine 1 was advanced beyond the idle position. [7] This caused the autobrakes to disengage and the spoilers to retract. [8] [9] The 4.5° right crab angle, the crosswinds faced on landing and asymmetric thrust caused the aircraft to drift right of the centerline. [1] The pilot's attention was tightly focused on the lateral movement, rather than deceleration. [4] Thus, vital callouts were never made. [7] Although manual braking was applied 8 seconds after touchdown, maximum braking did not occur until 15 seconds later. The plane was just 800 feet (244 m) from the end of runway 14. [8]

Five seconds later, Flight 4854 sped off the end of the asphalt at 77 knots (143 km/h; 89 mph) and slid down an embankment. [4] The nose and body landing gears collapsed, and engines 2 and 3 were ripped from each wing. [10] The aircraft finally came to rest, in a grassy area just short of a public road about 544 feet (166 m) past the end of runway 14. All three crew members were slightly injured. The passenger did not receive any injuries. [1]

Investigation

It was discovered that the crew had not received enough restorative rest in the 24 hours before the accident. [11] This factor, combined with the timing of the flight, significantly degraded the pilots' decision making and overall performance. [4] This added to the confusion and slowed reaction times of the crew to initiate a go-around or to catch each other's mistakes including disengaging the autobrakes. Another contributing factor was the pilots not choosing the easier approach for runway 23. [12] This was a longer runway perpendicular to runway 14. At the time of the accident, the first 1,767 feet (539 m) of runway 23 was closed for light and marking work. [13] The Notice to Airmen (NOTAM) the crew received stated "NOT AUTH" in reference to runway 23. This may have led the crew to believe the entire runway was closed. Accounting for the closed section, runway 23 was still longer than runway 14. [4]

Aftermath

The 747-400F involved (N908AR) was damaged beyond repair and written off. [1] The crew were sent to hospital for their injuries. The uninjured passenger was also admitted for assessment as a precaution. No crew members faced criminal charges. [14] [15] This incident is the most recent 747 hull loss during flight (not while stored).

See also

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References

  1. 1 2 3 4 "How a collection of minor factors caused 747 overrun in Halifax". www.key.aero. Retrieved January 5, 2023.
  2. ↑ Hemmerdinger, Jon (November 7, 2018). "Sky Lease 747-400F goes off runway at Halifax". Flight Global. Retrieved January 3, 2023.
  3. ↑ "CityNews". toronto.citynews.ca. Retrieved January 4, 2023.
  4. 1 2 3 4 5 6 "Runway overrun, Sky Lease Cargo, Boeing 747-412F, N908AR, Halifax/Stanfield International Airport, Nova Scotia, 07 November 2018" (PDF). Transportation Safety Board of Canada. November 19, 2018. A18A0085. Retrieved January 2, 2023.
  5. ↑ "TSB continues to investigate runway overrun at Halifax Stanfield". Skies Mag. Retrieved January 5, 2023.
  6. ↑ "Cargo Plane Skids Off Runway". Manitoba Post. November 7, 2018. Retrieved January 5, 2023.
  7. 1 2 Staff, Wings (June 30, 2021). "Runway overshoot that destroyed 747 cargo jet in Halifax caused by many factors: TSB". Wings Magazine. Retrieved January 3, 2023.
  8. 1 2 "ASN Aircraft accident Boeing 747-412F N908AR Halifax-Stanfield International Airport, NS (YHZ)". aviation-safety.net. Retrieved January 3, 2023.
  9. ↑ "How a collection of minor factors caused 747 overrun in Halifax". www.key.aero. Retrieved January 5, 2023.
  10. ↑ "Sky Lease Cargo, Boeing 747-400, N908AR: Accident occurred November 07, 2018, at Halifax Stanfield International Airport (YHZ), Nova Scotia, Canada" . Retrieved January 3, 2023.
  11. ↑ "FATIGUED PILOTS BEHIND BOEING 747 CRASH". Pulling Wings From Butterflies. June 11, 2021. Retrieved January 3, 2023.
  12. ↑ "Jet buffeted by winds before overshooting Halifax runway: investigator - Red Deer Advocate". www.reddeeradvocate.com. November 8, 2018. Retrieved January 3, 2023.
  13. ↑ "Multiple factors led to Sky Lease Cargo 747 runway overshoot". AeroTime. July 2, 2021. Retrieved January 3, 2023.
  14. ↑ Lau, Rebbeca (November 7, 2018). "Cargo plane goes off runway at Halifax airport, 4 sent to hospital". Global News. Retrieved January 5, 2023.
  15. ↑ MacDonald, Michael (November 7, 2018). "Four crew members hospitalized after cargo plane goes off runway in Halifax". The Globe and Mail. Retrieved January 5, 2023.
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