Eagle II Aero LLC: http://registry.faa.gov/N804ST
FAA Flight Standards District Office: FAA Little Rock FSDO-11
NTSB Identification: CEN16LA197
14 CFR Part 91: General Aviation
Accident occurred Monday, May 23, 2016 in Texarkana, AR
Aircraft: CESSNA 501, registration: N804ST
Injuries: 1 Uninjured.
This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed. NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
On May 23, 2016, about 2252, a Cessna 501, N804ST, lost cabin pressurization during cruise at flight level 430 and entered an uncontrolled descent near Texarkana, Arkansas. The pilot regained consciousness and control of the airplane about 7,000 feet mean sea level and landing without further incident. The airplane sustained substantial damage to both wings due to the excessive loads on the wings during the descent/recovery. The airline transport pilot, who was the sole occupant, was uninjured. The airplane was registered to Eagle II Aero LLC and was operated under 14 Code of Federal Regulations as a personal flight that was operating on an instrument rules flight plan. Night meteorological conditions prevailed at the time of the accident. The flight last departed from Perryville Municipal Airport, Perryville, Missouri (K02) and was destined to San Antonio International Airport (SAT), San Antonio, Texas.
Post-accident examination of the airplane revealed that the primary pressurization duct into the cabin was separated from its connection to the water separator. The duct's metal retaining clamp was present with its retaining screw in place. The clamp was not fractured and was resting around the metal duct leading to the separator.