# NTSB SEA04LA125: Schweizer G-164B, N7502Y, Wendell, ID, July 7, 2004 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: July 7, 2004, 11:10 local (17:10 UTC) - Place: Wendell, ID - Coordinates: 42.70861, -114.71083 - Nearby events: https://openairdocs.org/map.md?lat=42.7086&lon=-114.7108&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report October 28, 2004 - Report: Approved by Office Director - Parties: FAA-FSDO - NTSB case key (mKey): 59580 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA04LA125 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/59580/pdf - Page: https://openairdocs.org/ntsb/SEA04LA125 ## Probable cause A cracked cylinder head which resulted in a loss of engine power while maneuvering. High vegetation was a factor. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power, maneuvering - aerial application - engine assembly,cylinder - cracked (cause) - Forced landing, emergency descent/landing - On ground/water encounter with terrain/water, landing - roll - terrain condition - high vegetation (contributing factor) - Nose over, landing - roll ## Analysis The pilot reported that he had completed fertilizing one field and was proceeding to a second field at about 300 feet above ground level when the engine started running rough. The pilot increased mixture to full rich and checked the magnetos, however, the engine lost all power. The pilot maneuvered the aircraft to a corn field. During the landing roll, the aircraft nosed over and came to rest inverted. During an inspection of the engine, one of the cylinders displayed a crack around the cylinder head. ## Factual narrative On July 7, 2004, at 1110 mountain daylight time, a Schweizer Aircraft Corp. G-164B, N7502Y, registered to and operated by Ken Spray LLC, as a 14 CFR Part 137 aerial application flight, experienced a loss of engine power and subsequently nosed over during the landing roll in a corn field located about five miles south of Wendell, Idaho. Visual meteorological conditions prevailed at the time and no flight plan was filed. The aircraft was substantially damaged and the commercial pilot, the sole occupant, was not injured. The flight originated from a private airstrip near Jerome, Idaho, about 40 minutes prior to the accident. The pilot reported that he had completed fertilizing one field and was proceeding to a second field at about 300 feet above ground level when the engine started running rough. The pilot increased mixture to full rich and checked the magnetos, however, the engine lost all power. The pilot maneuvered the aircraft to a corn field. During the landing roll, the aircraft nosed over and came to rest inverted. During an inspection of the engine by a Federal Aviation Administration Inspector from the Boise, Idaho, Flight Standards District Office, the inspector reported that one of the cylinders displayed a crack around the cylinder head. ## Aircraft - Registration: [N7502Y](https://openairdocs.org/aircraft/N7502Y), registered now, S/N 821B, built 1990 (OpenAirDocs) - Reported make and model: Schweizer Aircraft Corp. 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: 821B - Airframe hours: 6184 - Engines: Pratt & Whitney 600 horsepower reciprocating - Damage: Substantial damage - Flight: Aerial application, Part 137 - Registered owner: Ken Spray LLC - Airworthiness certificate: Special, Restricted (Special) - Last inspection: 100 hour, July 3, 2004, 12 hours before - Departed: Jerome, ID - Destination: TWF, Twin Falls, ID ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 61; injuries: none; commercial; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; last flight review February 28, 2003; seat: center; flight hours: 15,965 total, 3,500 in this make and model, 15,965 as pilot in command, 219 in the last 90 days, 100 in the last 30 days, 6 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 290° at 16 knots, gusting 22 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 75 °F, dew point 46 °F - Altimeter: 29.94 inHg - Observed at: TWF, 17 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 20040707014359A](https://openairdocs.org/incident/20040707014359A), Jul 7, 2004: Scwzer G164B, Wendell, ID, Substantial damage. (-23) While enroute to apply dry fertilizer, the pilot stated that he heard a pop and then the engine lost all power. He advanced the mixture to full rich, but… ## Other investigations on N7502Y (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 WPR10CA444](https://openairdocs.org/ntsb/WPR10CA444), Sep 2, 2010: Schweizer 164B (N7502Y), Murtaugh, ID, substantial damage. Probable cause: The pilot’s inadequate compensation for the wind and failure to maintain directional control during the takeoff roll. 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.