# NTSB IAD04LA044: Schweizer G-164B, N7501H, Penn Yan, NY, September 5, 2004 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: September 5, 2004, 17:00 local (21:00 UTC) - Place: Penn Yan, NY - Coordinates: 42.636943, -77.05278 - Nearby events: https://openairdocs.org/map.md?lat=42.6369&lon=-77.0528&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report March 30, 2005 - Report: Approved by Office Director - Parties: FAA/FSDO - NTSB case key (mKey): 60072 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD04LA044 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/60072/pdf - Page: https://openairdocs.org/ntsb/IAD04LA044 ## Probable cause the pilot's loss of directional control during landing which resulted in excessive side-loads and failure of the right main landing gear wheel. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - on ground/water, landing - roll - directional control - not maintained, pilot in command (cause) - Airframe/component/system failure/malfunction, landing - landing gear,wheel - fractured ## Analysis After landing, the ferry pilot applied reverse propeller thrust to slow the airplane. At that time, the airplane yawed left, and the right main landing gear wheel and tire separated from the gear. The airplane continued on the right main landing gear strut until it departed the right side of the runway. Examination of the right main landing gear tire revealed that the tire was still on the rim and fully inflated; however, the center hub section of the wheel was "gone". The owner said the left yaw following propeller reversal is "normal", and that full right rudder is required to maintain directional control. The wheel, and broken pieces associated with the wheel, were recovered and forwarded to the Safety Board's Materials Laboratory in Washington, DC, for examination. The appearance of the fracture surfaces was consistent with overstress fracture, with no evidence of a preexisting crack, and that the wheel also displayed signatures consistent with excessive side load. ## Factual narrative On September 5, 2004, at 1700 eastern daylight time, a Schweizer G-164B, N7501H, was substantially damaged during landing at the Penn Yan Airport (PEO), Penn Yan, New York. The certificated airline transport pilot was not injured. Visual meteorological conditions prevailed for the ferry flight that originated at the Clermont County Airport, Batavia, Ohio (I69), at 1515. No flight plan was filed for the flight conducted under 14 CFR Part 91. In a written statement, the pilot said that he landed on runway 28 at Penn Yan and applied reverse thrust to slow the airplane. At that time, the airplane yawed left, and the right main landing gear wheel and tire separated from the gear. The airplane continued on the right main landing gear strut until it departed the right side of the runway. When the airplane departed the landing surface, the right gear strut dug into the ground and separated from the airplane. The right wing and the propeller struck the ground and the airplane came to rest on the runway with the nose over the grass apron. The airplane was examined at the scene by a Federal Aviation Administration (FAA) aviation safety inspector. According to the inspector, the right main landing gear tire was still mounted to the rim and fully inflated; however, the center hub section of the wheel was "gone". The pilot reported 4,000 hours of flight experience; 2,400 in single-engine airplanes and 8 hours in make and model. In a written statement, the owner/operator of the airplane said that he had 5,000 hours of flight experience in this make and model airplane, and 700 hours in the model with this specific engine conversion. He explained that when the propeller was reversed during the landing roll, it was "normal" for the airplane to yaw to the left. If the propeller reversal was done at a higher ground speed, the yaw was more pronounced. The owner said that application of full right rudder was required to compensate for the yaw during propeller reversal in order to maintain directional control. The wheel, and broken pieces associated with the wheel, were recovered and forwarded to the Safety Board's Materials Laboratory in Washington, DC, for examination. According to the Safety Board's Materials Laboratory factual report, the appearance of the fracture surfaces was consistent with overstress fracture, with no evidence of a preexisting crack. The weather reported at the Penn Yan Airport, at 1653, was clear skies with 5 miles visibility in haze. The wind was from 190 degrees at 7 knots. The temperature was 79 degrees Fahrenheit, the dew point 70 degrees Fahrenheit, and the barometric pressure was 30.25 inches of mercury. ## Aircraft - Registration: [N7501H](https://openairdocs.org/deregistered/N7501H-2007-12-07), registration cancelled 2007-12-07, S/N 801B, built 1988 (OpenAirDocs) - Reported make and model: Schweizer G-164B - Registry model: [Schweizer G-164B](https://openairdocs.org/model/schweizer-g-164b) (registry code 8059055) (OpenAirDocs) - Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 801B - Airframe hours: 5500 - Engines: Walter 601D-11 720 horsepower turbo prop - Damage: Substantial damage - Flight: Ferry, Part 91 - Registered owner: Louis B. Blackwell - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, August 19, 2004, 10 hours before - Departed: I69, BATAVIA, OH - Destination: PEO, PENN YAN, NY - Airport: PEO, Penn Yan Airport, runway 28, 5,500 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 47; injuries: none; private, airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; last flight review September 1, 2004; seat: center; flight hours: 4,000 total, 8 in this make and model, 2,900 as pilot in command, 115 in the last 90 days, 50 in the last 30 days, 8 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 190° at 7 knots - Visibility: 5 statute miles - Lowest ceiling: none - Temperature: 79 °F, dew point 66 °F - Altimeter: 30.25 inHg - Observed at: PEO ## 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 20040905026929A](https://openairdocs.org/incident/20040905026929A), Sep 5, 2004: Scwzer G164B, Penn Yan, NY, Substantial damage. (-23) On 09-05-04, at approx. 1900 EDT, a Schweizer G-164B aircraft with registration N7501H conducted a normal landing at Penn Yan NY. During the landing, the… ## Other investigations on N7501H (1) 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. - [NTSB FTW03CA180](https://openairdocs.org/ntsb/FTW03CA180), Jun 28, 2003: Schweizer G-164B (N7501H), Vega, TX, substantial damage. Probable cause: The failure of the left brake for undetermined reasons. 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.