NTSB Identification: DCA11PA075
14 CFR Public Use
Accident occurred Wednesday, May 18, 2011 in Point Mugu, CA
Probable Cause Approval Date: 02/26/2014
Aircraft: BOEING 707-321B, registration: N707AR
Injuries: 3 Minor.

NTSB investigators traveled in support of this investigation and obtained data from various sources to prepare this public aircraft accident report.

The NTSB's full report is available at http://www.ntsb.gov/investigations/reports_aviation.html. The Aircraft Accident Brief number is NTSB/AAB-13/01.

On May 18, 2011, about 1727 Pacific daylight time,[1] a modified Boeing 707, registration N707AR, operating as Omega Aerial Refueling Services (Omega) flight 70 crashed on takeoff from runway 21 at Point Mugu Naval Air Station, California (KNTD). The airplane collided with a marsh area to the left side beyond the departure end of the runway and was substantially damaged by postimpact fire. The three flight crewmembers sustained minor injuries. The flight was conducted under the provisions of a contract between Omega and the US Naval Air Systems Command (NAVAIR) to provide aerial refueling of Navy F/A-18s in offshore warning area airspace. According to the Federal Aviation Administration (FAA), Omega, and the US Navy, the airplane was operating as a nonmilitary public aircraft under the provisions of 49 United States Code Sections 40102 and 40125.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

the failure of a midspar fitting, which was susceptible to fatigue cracking and should have been replaced with a newer, more fatigue-resistant version of the fitting as required by an airworthiness directive. Also causal was an erroneous maintenance entry made by a previous aircraft owner, which incorrectly reflected that the newer fitting had been installed.

Full narrative available

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