ASN logo
Last updated: 23 January 2022
Status:Schlussbericht
Datum:Freitag 12 Februar 2016
Zeit:ca 07:00
Flugzeugtyp:Silhouette image of generic C130 model; specific model in this crash may look slightly different
Lockheed L-100-30 Hercules
Fluggesellschaft:Lynden Air Cargo
Kennzeichen: N401LC
Werknummer: 4606
Baujahr: 1975
Betriebsstunden:55393
Anzahl Zyklen der Zelle:35421
Triebwerk: 4 Allison 501-D22A
Besatzung:Todesopfer: 0 / Insassen: 5
Fluggäste:Todesopfer: 0 / Insassen: 0
Gesamt:Todesopfer: 0 / Insassen: 5
Sachschaden: schwer beschädigt
Konsequenzen: Repaired
Unfallort:nahe Iliamna, AK (   USA)
Flugphase: Während des Fluges (ENR)
Betriebsart:Frachtflug
Flug von:Bethel Airport, AK (BET/PABE), USA
Flug nach:Anchorage-Elmendorf AFB, AK (EDF/PAED), USA
Flugnummer:LYC401
Unfallbericht:
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."

Informationsquelle:
» NTSB
» Flightaware


Sicherheitsempfehlungen
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.

Fotos

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

Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Bethel Airport, AK to Anchorage-Elmendorf AFB, AK as the crow flies is 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