Crash-aerien 14 OCT 2020 d'un Beechcraft 99A Airliner N499CZ - Waterville-Robert Lafleur Airport, ME (WVL)
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Statuts:Accident investigation report completed and information captured
Date:mercredi 14 octobre 2020
Heure:08:20
Type/Sous-type:Silhouette image of generic BE99 model; specific model in this crash may look slightly different
Beechcraft 99A Airliner
Compagnie:Freight Runners Express
Immatriculation: N499CZ
Numéro de série: U-81
Année de Fabrication: 1969
Heures de vol:39544
Moteurs: 2 Pratt & Whitney Canada PT6A-28
Equipage:victimes: 0 / à bord: 1
Passagers:victimes: 0 / à bord: 0
Total:victimes: 0 / à bord: 1
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:Waterville-Robert Lafleur Airport, ME (WVL) (   Etats-Unis d'Amérique)
Phase de vol: Au roulage (TXI)
Nature:Cargo
Aéroport de départ:Manchester-Boston Regional Airport, NH (MHT/KMHT), Etats-Unis d'Amérique
Aéroport de destination:Waterville-Robert Lafleur Airport, ME (WVL/KWVL), Etats-Unis d'Amérique
Détails:
While taxiing to the ramp, the airplane's right main landing gear collapsed, resulting in substantial damage to the right wing. Examination of the right main landing gear drag leg support fitting and angle bracket revealed several areas of fatigue cracking with multiple origins. The attach angle bracket fracture exhibited features consistent with fatigue.
The reason for the crack initiation could not be determined.
A review of the maintenance procedures performed on the right main landing gear 8 days prior to the accident found that they instructed the mechanic to add grease to the drag leg fitting. The procedures did not specify to examine the landing gear for fatigue cracking or anomalies; therefore, it is unlikely that the mechanic would have looked in the area of the cracked main landing gear drag leg support fitting and angle bracket. Furthermore, there was no nondestructive testing procedures for examining the main landing gear drag brace, so it's unlikely an inspection would have detected the multiple areas of fatigue cracking.

Probable Cause:

Probable Cause: A failure of the right main landing gear drag leg support fitting and angle bracket as a result of multiple areas of fatigue cracking.

Accident investigation:

cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 2 years
Accident number: ERA21LA021
Download report: Summary report


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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 Manchester-Boston Regional Airport, NH et Waterville-Robert Lafleur Airport, ME est de 226 km (141 miles).
Accident location: Exact; as reported in the official accident report.

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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