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ASN Wikibase Occurrence # 231954
Last updated: 19 September 2021
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Date:05-JAN-2020
Time:12:07 LT
Type:Silhouette image of generic B738 model; specific model in this crash may look slightly different
Boeing 737-8CT (WL)
Owner/operator:WestJet
Registration: C-FUJR
MSN: 60130/5341
Fatalities:Fatalities: 0 / Occupants: 178
Other fatalities:0
Aircraft damage: None
Category:Serious incident
Location:Halifax-Stanfield International Airport, NS (YHZ/CYHZ) -   Canada
Phase: Landing
Nature:Passenger - Scheduled
Departure airport:Toronto-Pearson International Airport, ON (YYZ/CYYZ)
Destination airport:Halifax-Stanfield International Airport, NS (YHZ/CYHZ)
Investigating agency: TSB Canada
Narrative:
WestJet Airlines flight WJA248, a Boeing 737-8CT, departed Toronto/Lester B. Pearson International Airport, Ontario, to Halifax/Stanfield International Airport, Nova Scotia, with 172 passengers and 6 crew members on board. The flight crew had originally planned for an approach for Runway 05 at the Halifax/Stanfield International Airport. However, approximately 14 minutes before landing, due to lowering ceiling and reduced visibility, they requested to change to the Runway 14 instrument landing system approach. At 12:07 Atlantic Standard Time, the aircraft touched down with a tailwind component on the wet, snow-covered runway. Following touchdown, the aircraft could not be stopped and it overran the end of Runway 14. The aircraft came to rest in snow with the nose wheel approximately 300 feet (91 m) beyond the runway end. There were no injuries and no damage to the aircraft. There was no post-impact fire, and the emergency locator transmitter did not activate.

Weather about the incident time (1608Z):
CYHZ 051618Z 36018G25KT 1/2SM R14/4000FT/N SN OVC003 M01/M01 A2912 RMK ST8 SLP869
CYHZ 051600Z 36015G23KT 1/2SM R14/4000V5500FT/D SN OVC002 M00/M00 A2912 RMK ST8 /S07/ SLP869
CYHZ 051549Z 01016G27KT 1/2SM R14/5000FT/N SN OVC002 M00/M00 A2912 RMK ST8 SLP869

Findings as to causes and contributing factors:
1. While preparing for the runway change, the flight crew mentally assessed that the wind for Runway 05 would become a crosswind for Runway 14. As a result, they did not recalculate the effects of the wind for the approach to Runway 14, but rather considered that the landing distance and the target approach speed calculated for Runway 05 were still appropriate.
2. The reported winds on the ground had backed and increased slightly as the flight progressed. This resulted in a tailwind component that exceeded the operator’s limitation of 10 knots, a lower required approach speed of Vref + 5 knots, and a landing distance that exceeded the runway length available. None of this was recognized by the flight crew and, as a result, they continued the approach to Runway 14.
3. The unchanged target approach speed combined with the tailwind resulted in the aircraft crossing the threshold 10 knots faster than recommended and touching down at a faster groundspeed, thus requiring a longer stopping distance.
4. The wet snow contamination on the runway resulted in a reduction in braking effectiveness, contributing to an increase in landing distance.
5. The increase in the landing distance due to the fast approach, combined with the tailwind component and contaminated runway, was in excess of the remaining runway available and resulted in the overrun.

Sources:

https://www.thechronicleherald.ca/news/provincial/breaking-westjet-passenger-plane-slides-off-runway-in-halifax-394367/
https://www.flightradar24.com/data/flights/ws248#236b9309

Accident investigation:
cover
  
Investigating agency: TSB Canada
Status: Investigation completed
Duration: 1 year and 4 months
Download report: Final report
Location

Media:


Images:


Photo: TSB

Revision history:

Date/timeContributorUpdates
05-Jan-2020 17:17 harro Added
05-Jan-2020 17:18 harro Updated [Source, Embed code]
05-Jan-2020 17:46 Iceman 29 Updated [Embed code]
05-Jan-2020 17:48 Iceman 29 Updated [Total occupants, Embed code, Narrative]
05-Jan-2020 17:49 Iceman 29 Updated [Narrative]
05-Jan-2020 17:54 Iceman 29 Updated [Date]
08-Jan-2020 18:25 harro Updated [Narrative]
22-May-2021 17:55 harro Updated [Time, Narrative, Accident report, Photo]
22-May-2021 17:56 harro Updated [Source, Category]

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