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Last updated: 9 August 2020
Statuts:Enquête Officielle
Date:samedi 25 avril 2009
Type/Sous-type:Silhouette image of generic P2 model; specific model in this crash may look slightly different
Lockheed SP-2H Neptune
Compagnie:Neptune Aviation Services
Immatriculation: N442NA
Numéro de série: 726-7286
Année de Fabrication:
Equipage:victimes: 2 / à bord: 2
Passagers:victimes: 1 / à bord: 1
Total:victimes: 3 / à bord: 3
Dégats de l'appareil: Substantiels
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:2,7 km (1.7 milles) N of Stockton, UT (   Etats-Unis d'Amérique)
Phase de vol: En vol (ENR)
Aéroport de départ:Missoula Airport, MT (MSO/KMSO), Etats-Unis d'Amérique
Aéroport de destination:Alamogordo Municipal Airport, NM (ALM/KALM), Etats-Unis d'Amérique
A Lockheed P2V-7 Neptune, N442NA, impacted the terrain about one and one-half mile north of Stockton, Utah. The two airline transport pilots and their passenger were killed in the accident, and the airplane was substantially damaged by the impact sequence. The airplane was owned and operated by Neptune Aviation Services, and dispatched as the result of the issuance of a Resource Order (Aircraft) issued by the National Interagency Coordination Center (NICC). The repositioning flight, which departed Missoula, Montana, about two hours prior to the accident, was en route to Alamogordo, New Mexico. At the time of the accident, the airplane was flying in an area of low ceilings and restricted visibility. No flight plan had been filed with the Federal Aviation Administration, but a company flight plan was on file with NICC.

Probable Cause:

Probable Cause: "The flight crew's failure to maintain terrain clearance during low altitude flight in low ceiling and visibility conditions. Contributing to the accident was the flight crew's failure to adequately monitor their location with respect to the rising terrain environment ahead, and, their lack of crew resource management communication as a crew."

Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 2 months
Accident number: WPR09GA216
Download report: Summary report



photo of Lockheed-SP-2H-Neptune-N442NA
accident date: 25-04-2009
type: Lockheed SP-2H Neptune
registration: N442NA
photo of Lockheed-SP-2H-Neptune-N442NA
accident date: 25-04-2009
type: Lockheed SP-2H Neptune
registration: N442NA

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 Missoula Airport, MT et Alamogordo Municipal Airport, NM est de 1697 km (1060 miles).
Accident location: Approximate; accuracy within a few kilometers.

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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