ASN logo
Last updated: 28 January 2022
Status:Definitief
Datum:vrijdag 12 februari 2016
Tijd:ca 07:00
Type:Silhouette image of generic C130 model; specific model in this crash may look slightly different
Lockheed L-100-30 Hercules
Luchtvaartmaatschappij:Lynden Air Cargo
Registratie: N401LC
Constructienummer: 4606
Bouwjaar: 1975
Aantal vlieguren:55393
Aantal vluchten:35421
Motoren: 4 Allison 501-D22A
Bemanning:slachtoffers: 0 / inzittenden: 5
Passagiers:slachtoffers: 0 / inzittenden: 0
Totaal:slachtoffers: 0 / inzittenden: 5
Schade: Groot
Gevolgen: Repaired
Plaats:nabij Iliamna, AK (   Verenigde Staten)
Fase: Kruisvlucht (ENR)
Soort vlucht:Vracht
Vliegveld van vertrek:Bethel Airport, AK (BET/PABE), Verenigde Staten
Vliegveld van aankomst:Anchorage-Elmendorf AFB, AK (EDF/PAED), Verenigde Staten
Vluchtnummer:LYC401
Beschrijving:
A Lockheed L-100-30 Hercules transport plane, operated by Lynden Air Cargo, diverted to Iliamna Airport, Alaska following a rapid in-flight decompression.
The aircraft departed Bethel, Alaska at 06:50 hours local time on a flight to Elmendorf Air Force Base near Anchorage. The airplane climbed to the planned cruising altitude of FL250. At 07:11, upon reaching 24500 feet, there was an in-flight decompression. The flight crew initiated an emergency descent to FL120, which was reached at 07:16 hours. The flight then diverted to Iliamna were a safe landing was carried out at 08:05 hours.
Examination of the airplane revealed a large hole in the forward pressure bulkhead canted web.

The next day the aircraft was ferried to Anchorage and from there to Kelowna, BC, Canada at an altitude of 10000 feet.

Probable Cause:

PROBABLE CAUSE: "The fatigue failure of the forward pressure bulkhead canted web that originated from stress corrosion cracking areas. Contributing to the failure were inspection procedures and intervals inadequate to identify the crack."

Bronnen:
» NTSB
» Flightaware


Veiligheidsmaatregelen
The manufacturer released a Service Bulletin based on the findings of the investigation to provide more detailed instructions and updated intervals to inspect for cracking of the forward pressure bulkhead canted web.

Foto's

photo of Lockheed-L-100-30-Hercules-N401LC
flight route
 

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 Bethel Airport, AK en Anchorage-Elmendorf AFB, AK bedraagt 645 km (403 miles).

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.
languages: languages

Share