| Date: | Friday 12 February 2016 |
| Time: | 07:00 |
| Type: |  Lockheed L-100-30 Hercules |
| Owner/operator: | Lynden Air Cargo |
| Registration: | N401LC |
| MSN: | 4606 |
| Year of manufacture: | 1975 |
| Total airframe hrs: | 55393 hours |
| Cycles: | 35421 flights |
| Engine model: | Allison 501-D22A |
| Fatalities: | Fatalities: 0 / Occupants: 5 |
| Aircraft damage: | Substantial, repaired |
| Category: | Accident |
| Location: | near Iliamna, AK -
 United States of America
|
| Phase: | En route |
| Nature: | Cargo |
| Departure airport: | Bethel Airport, AK (BET/PABE) |
| Anchorage-Elmendorf AFB, AK (EDF/PAED) | |
| Confidence Rating: |  Accident investigation report completed and information captured |
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: "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."
Sources:
NTSB
Flightaware
History of this aircraft
Other occurrences involving this aircraft
| 31 January 1990 | S9-NAJ | Transafrik | 0 | near Luanda |  |
sub |
| Mid-air collision | ||||||
| 2 July 2001 | N401LC | Lynden Air Cargo | 0 | Lake Minchumina Airport, AK (MHM) | |
sub |
| 18 July 2007 | N401LC | Lynden Air Cargo | 0 | 39 km WNW of McGrath, AK | |
sub |
Images:
photo (c) Flightradar24; near Iliamna, AK; 12 February 2016
Revision history:
| Date/time | Contributor | Updates |
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