Vliegtuigongeval op 14 OCT 2020 met Beechcraft 99A Airliner N499CZ - Waterville-Robert Lafleur Airport, ME (WVL)
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Status:Accident investigation report completed and information captured
Datum:woensdag 14 oktober 2020
Tijd:08:20
Type:Silhouette image of generic BE99 model; specific model in this crash may look slightly different
Beechcraft 99A Airliner
Luchtvaartmaatschappij:Freight Runners Express
Registratie: N499CZ
Constructienummer: U-81
Bouwjaar: 1969
Aantal vlieguren:39544
Motoren: 2 Pratt & Whitney Canada PT6A-28
Bemanning:slachtoffers: 0 / inzittenden: 1
Passagiers:slachtoffers: 0 / inzittenden: 0
Totaal:slachtoffers: 0 / inzittenden: 1
Schade: Groot
Gevolgen: Repaired
Plaats:Waterville-Robert Lafleur Airport, ME (WVL) (   Verenigde Staten)
Fase: Taxi (TXI)
Soort vlucht:Vracht
Vliegveld van vertrek:Manchester-Boston Regional Airport, NH (MHT/KMHT), Verenigde Staten
Vliegveld van aankomst:Waterville-Robert Lafleur Airport, ME (WVL/KWVL), Verenigde Staten
Beschrijving:
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:

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


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Kaart
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Manchester-Boston Regional Airport, NH en Waterville-Robert Lafleur Airport, ME bedraagt 226 km (141 miles).
Accident location: Exact; as reported in the official accident report.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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