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Statuts:Enquête Officielle
Date:mardi 3 mars 2009
Heure:12:09
Type/Sous-type:Silhouette image of generic SW4 model; specific model in this crash may look slightly different
Swearingen SA226-TC Metro II
Compagnie:Perimeter Airlines (Inland)
Immatriculation: C-FSLZ
Numéro de série: TC-222EE
Année de Fabrication: 1976
Moteurs: 2 Garrett TPE331-10UA-511G
Equipage:victimes: 0 / à bord: 2
Passagers:victimes: 0 / à bord: 8
Total:victimes: 0 / à bord: 10
Dégats de l'appareil: Mineurs
Conséquences: Repaired
Lieu de l'accident:Winnipeg-James Armstrong Richardson International Airport, MB (YWG) (   Canada)
Phase de vol: A l'atterrissage (LDG)
Nature:Transport de Passagers Nat.
Aéroport de départ:Ste Thérèse Point Airport, MB (YST/CYST), Canada
Aéroport de destination:Winnipeg-James Armstrong Richardson International Airport, MB (YWG/CYWG), Canada
Numéro de vol: 640
Détails:
Perimeter Flight PAG 640, a Metro II with 2 crew and 8 passengers, was on approach to runway 18 at Winnipeg after a flight from St. Theresa Point when the crew carried out a missed approach due to landing gear problems. The right main gear would not extend in the down and locked position. The crew attempted a landing with the right main gear up and possibly hoped to free the gear to extend, however, this was unsuccessful and they subsequently elected to land gear up on their second approach. The aircraft landed successfully on its belly and came to a stop on the runway. The aircraft landed between Taxiways P and Q and all 10 occupants were evacuated and were transported to the hospital as a precaution. There were no obvious injuries and there was no fire after landing. The aircraft sustained substantial damage to its propellers, flaps and aft belly area. Inspection by TSB indicated that the inboard right main landing gear door partially hung up on the wheel well structure, preventing the extension of the landing gear. The reason for the gear door interference is under investigation.
This aircraft was involved in an unsafe gear incident the previous day at Winnipeg.

Probable Cause:

FINDINGS AS TO CAUSES AND CONTRIBUTING FACTORS:
1. The right inboard landing gear door was incorrectly rigged, which reduced the clearance between the tire and gear door during gear extension. The mis-rigged landing gear door likely went unnoticed through four separate inspections.
2. The combined effect of the mis-rigged gear door, the installation of a new re-capped tire with large dimensions, growing free play in the gear door bushings/linkage arrangement, and air loading on the gear door reduced clearances sufficiently that the number three tire caught on a ledge on the inboard door skin, preventing the right main gear from extending.

Accident investigation:
cover
Investigating agency: TSB Canada
Status: Investigation completed
Duration: 205 days (7 months)
Accident number: A09C0028
Download report: Final report
Language: English

Sources:
» CADORS Number: 2009C0523
» CADORS Number: 2009C0528


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Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Ste Thérèse Point Airport, MB et Winnipeg-James Armstrong Richardson International Airport, MB est de 464 km (290 miles).

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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