# NTSB CHI94LA319: Snider CP328 Super Emeraude, N90484, Painton, MO, September 10, 1994 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: September 10, 1994, 09:10 local (14:10 UTC) - Place: Painton, MO - Location: 37.0823° N, 89.7948° W: Placed by OpenAirDocs: center of Painton, MO, within about 6 miles (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=37.0823&lon=-89.7948&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 1 serious, 1 minor - Status: Completed, report May 4, 1995 - Report: Approved by Office Director - NTSB case key (mKey): 9673 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI94LA319 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/9673/pdf - Page: https://openairdocs.org/ntsb/CHI94LA319 ## Probable cause in flight delamination and subsequent failure of the hand carved wooden propeller. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, climb - to cruise - propeller system/accessories,blade - delamination (cause) - Forced landing, descent - emergency - Nose over, landing - flare/touchdown ## Analysis IN HIS WRITTEN STATEMENT THE PILOT THOROUGHLY DESCRIBED HIS PREFLIGHT PROCEDURES AND SAID HE PULLED THE ENGINE THROUGH TWO REVOLUTIONS. HE SAID HE WAS CLIMBING ON COURSE WHEN THE AIRPLANE BEGAN SHAKING VIOLENTLY. DURING THE FORCED LANDING IN A SOYBEAN FIELD, THE AIRPLANE NOSED OVER SUSTAINING SUBSTANTIAL DAMAGE. THE PILOT REPORTED THAT THE HAND CARVED WOOD PROPELLER HAD FAILED. HE SAID THAT ONE BLADE HAD DELAMINATED AND HAD SPLIT FROM THE TIP TO THE HUB. A 'GOOD SIZED PIECE' HAD SEPARATED IN FLIGHT. ## Factual narrative On September 10, 1994, about 0910 central daylight time, an experimental Snider CP328 Super Emeraude, N90484, sustained substantial damage during a forced landing in Painton, Missouri. The private pilot sustained minor injuries. One pilot rated passenger sustained serious injuries. Visual meteorological conditions prevailed for the personal flight conducted under CFR 14 Part 91. No flight plan was filed. The flight origniated from Painton, Missouri, at 0904. In his written statement, the pilot thoroughly described his preflight procedures and said he pulled the engine through two revolutions. He said he was climbing on course when the airplane began shaking violently. He reduced the throttle, lowered the nose of the airplane, and turned the magneto switch to the off position. He said the shaking did not subside and was so violent he could not read the airspeed indicator. He sought an appropriate pitch attitude and conducted a forced landing in a soybean field. During the landing, the airplane nosed over. The pilot reported the smell of fuel and said he was initially trapped in the airplane. He said he managed to eventually free himself and the passenger. The pilot reported that the hand carved wood propeller had failed. He said that one blade had delaminated and had split from the tip to the hub. A "good sized piece" had separated in flight. ## Aircraft - Registration: [N90484](https://openairdocs.org/deregistered/N90484-2023-11-11), registration cancelled 2023-11-11, S/N ALS-1 (OpenAirDocs) - Reported make and model: SNIDER CP328 SUPER EMERAUDE (CP328 SUPE) - Registry model: [Snider Alva Loyd CP328 SUPER EMERAUDE](https://openairdocs.org/model/snider-alva-loyd-cp328-super-emeraude) (registry code 7020240) (OpenAirDocs) - Registry engine: [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: ALS1 - Airframe hours: 100 - Engines: LYCOMING O-290G 125 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Alva Loyd Snider - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, August 21, 1994, 1 hours before - Departed: MO - Destination: IRK, KIRKSVILLE, MO ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 76; private, foreign, student, airline transport; airplane ratings: single-engine sea, single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 189 total, 78 in this make and model, 132 as pilot in command ## Weather - Conditions: Visual (VMC), Day - Wind: 130° at 5 knots - Visibility: 7 statute miles - Lowest ceiling: none - Temperature: 84 °F, dew point 61 °F - Altimeter: 30.00 inHg - Observed at: CGI, 20 nm away ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 19940910029839A](https://openairdocs.org/incident/19940910029839A), Sep 10, 1994: Amtr CP301, Painton, MO, Substantial damage. Engine vibration climb to cruise. Nosed over landing in soybeans. Hand carved wood prop failed. Delaminated. From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.