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Thread: ntsb prelim

  1. #1
    Member Float Pilot's Avatar
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    Default ntsb prelim

    Anyone else see the photos of the recovered A/C and note the lack of any damage to the prop.?






    NTSB Identification: ANC15FA062
    14 CFR Part 91: General Aviation
    Accident occurred Thursday, August 06, 2015 in Chugiak, AK
    Aircraft: PIPER PA 18-150, registration: N3675P
    Injuries: 2 Fatal.

    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 either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
    On August 6, 2015, about 2350 Alaska daylight time, a wheel-equipped Piper PA-18-150 airplane, N3675P, sustained substantial damage during impact with the ocean waters of Knik Arm about 4 miles northwest of Chugiak, Alaska. The private pilot and one passenger are presumed to have received fatal injuries. The airplane was registered to, and operated by, the pilot as a visual flight rules (VFR) cross-country personal flight under the provisions of Title 14 Code of Federal Regulations (CFR) Part 91, when the accident occurred. Visual meteorological conditions (VMC) prevailed along the route of flight, and no flight plan was filed. The flight departed the McGrath Airport, McGrath, Alaska, at 2111, en route to the Birchwood Airport, Chugiak.

    A postaccident review of archived Federal Aviation Administration (FAA) radio communication recordings revealed that at 2109, the pilot reported taxiing for departure from the McGrath Airport. At 2111, he reporting taking off from runway 16 at the McGrath Airport. No further radio communications were received from the airplane.

    At 2354, a 911 call was received by the Alaska State Troopers from the pilot, stating that he had just crashed in the waters of Knik Arm, and was standing on top of his airplane. He requested rescue, and stated that he was too far from shore to swim. At 0003, the Alaska Rescue Coordination Center received notification of the accident and air assets were on scene searching at 0016. The search was conducted by personnel from the Alaska Air National Guard, U.S. Air Force, Alaska State Troopers and Civil Air Patrol, with support from the U.S. Coast Guard.

    On August 7, about 0610, the airplane was located about 1.8 miles northwest of the Birchwood Airport. The airplane was inverted and mostly submerged under the salt water with the bottom of the fuselage, wing strut attach points, landing gear, and a portion of the propeller protruding above the water. The occupants were not located with the airplane, and the official search continued through August 8 before being suspended. The two occupants are still missing and presumed deceased.

    The area the airplane was located in was a portion of the Knik Arm consisting of fast moving salt water. The several rivers that terminate at the inlet are glacier fed, and visibility in the water is often less than 1 foot due to turbidity. The Knik Arm is an area with strong tidal influence, and strong currents.

    On August 8, about 1045, the airplane was extracted from the water by helicopter. Due to the amount of water and organic material contained within the airplane after being submerged through several tide cycles, the airframe structure could not support the additional weight. Both wings fractured at the forward spar attach points and folded aft. The fuselage fractured about 3 feet forward of the horizontal stabilizer and remained attached by the rudder and elevator control cables.

    A Garmin 196 handheld GPS was still mounted on the instrument panel and all cables were still attached. The unit was removed and sent to the NTSB Vehicle Recorder Laboratory in Washington, D.C. for download.

    The closest weather reporting facility is Birchwood Airport, Chugiak, about 2 miles southeast of the accident site. At 2336, an aviation routine weather report (METAR) from the Birchwood Airport was reporting in part: wind from 120 degrees at 3 knots; sky condition, clear; visibility, 10 statute miles; temperature 63 degrees F; dewpoint 52 degrees F; altimeter, 29.85 inHg.

    A detailed wreckage and engine examination is pending. The airplane was equipped with a Lycoming O-320 series engine.
    Floatplane,Tailwheel and Firearms Instructor- Dragonfly Aero
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  2. #2
    Member AKDoug's Avatar
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    I noticed that as well, and pointed out as much to my wife. Dead stick landing, out of fuel?
    Bunny Boots and Bearcats: Utility Sled Mayhem

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    [QUOTE=AKDoug;1497169]I noticed that as well, and pointed out as much to my wife. Dead stick landing, out of fuel?[/QUOTE:

    It appears so, doesn't it . . .

  4. #4
    Member Float Pilot's Avatar
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    I wonder where they found the plane,,, up by the sand-bar area north of Birchwood or out in the main part of Knik Arm??
    Knik arm is about seven miles wide at it's widest point in that area, so you would want to be at least 2,500-3000 ft in altitude in the middle if you need to glide.

    Many moons ago I blew an oil cooler line over Knik arm and had to glide my PA-12 to Birchwood strip. Holiday fixed me up with a used oil hose and 5 quarts of new oil.
    Floatplane,Tailwheel and Firearms Instructor- Dragonfly Aero
    Experimental Hand-Loader, NRA Life Member
    http://site.dragonflyaero.com

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