# NTSB DFW05CA207: Grumman G-164, N9041Q, Knobel, AR, August 9, 2005 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: August 9, 2005, 17:55 local (22:55 UTC) - Place: Knobel, AR - Coordinates: 36.401668, -90.64167 - Nearby events: https://openairdocs.org/map.md?lat=36.4017&lon=-90.6417&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 27, 2005 - Report: Approved by Office Director - Parties: FSDO Little Rock, - NTSB case key (mKey): 62189 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DFW05CA207 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/62189/pdf - Page: https://openairdocs.org/ntsb/DFW05CA207 ## Probable cause The loss of engine power due to the failure of the #1 cylinder head. A contributing factor was the lack of suitable terrain for the forced landing. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(partial) - mech failure/malf, maneuvering - aerial application - engine assembly,cylinder - separation (cause) - Forced landing, descent - emergency - On ground/water encounter with terrain/water, emergency landing - terrain condition - none suitable (contributing factor) ## Analysis The 1,013-hour commercial pilot, was making the last aerial application pass before returning for another load, when he heard a "pop, and the engine started missing." The pilot lined up for a forced landing on a grass strip, that was about a quarter of a mile from his location. However; the airplane impacted the ground approximately 200 yards short of the airstrip. The airplane bounced once and impacted the muddy field, and nosed over. An examination of the radial engine revealed that the number one cylinder head had cracked and separated from the barrel. ## Factual narrative On August 9, 2005, approximately 1755 central daylight time, a single-engine Grumman G-164 agricultural airplane, N9041Q, was substantially damaged during a forced landing following a loss of power while maneuvering near Corning, Arkansas. The commercial pilot, the sole occupant of the airplane, was not injured. The airplane was registered to a private individual and operated by Corning Farm Supply, Inc., of Corning Arkansas, under 14 Code of Federal Regulations Part 137 as an aerial application flight. Visual meteorological conditions prevailed and a flight plan had not been filed for the local flight. According to a written statement submitted by the 1,013-hour pilot, he was making the last pass before returning for another load, when he heard a "pop, and the engine started missing." He lined up for a forced landing on a grass strip, that was about a quarter of a mile from his location. However, the airplane impacted a muddy field approximately 200 yards short of the landing threshold of the airstrip. He further stated that, "the airplane bounced once and struck the muddy field again and flipped over", coming to rest in the inverted position. The pilot reported that the number one cylinder head on the radial engine had cracked and separated from the barrel. An examination of the airplane by a Federal Aviation Administration (FAA) inspector, who traveled to the scene of the accident, revealed structural damage to the fuselage when the empennage separated from the airplane. At 1755, the automated weather observing system at Walnut Ridge Regional Airport (ARG), approximately 20 miles southwest of the accident site, reported wind at 100 degrees at 04 knots, 09 statute miles visibility, a clear sky, 90 Fahrenheit, dew point 72 degrees Fahrenheit, and an altimeter setting of 29.96 inches of Mercury. ## Aircraft - Registration: [N9041Q](https://openairdocs.org/deregistered/N9041Q-2011-03-03), registration cancelled 2011-03-03, S/N 1697 (OpenAirDocs) - Reported make and model: Grumman G-164 - Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (OpenAirDocs) - Category: Airplane - Serial number: 1697 - Airframe hours: 5818 - Engines: Pratt & Whitney R-1340-AN1 reciprocating - Damage: Substantial damage - Flight: Aerial application, Part 137 - Operator: Corning Farm Supply, Inc, doing business as Corning Farm Supply, Inc - Registered owner: Cindy Woolard - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, January 1, 2005 - Departed: 4M9, CORNING, AR - Destination: 4M9, CORNING, AR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 34; injuries: none; commercial; airplane ratings: single-engine land, multi-engine land; medical: class 2, without waivers/limitations; last flight review September 1, 2003; seat: single; flight hours: 1,013 total, 340 in this make and model, 895 as pilot in command, 35 in the last 90 days, 31 in the last 30 days, 4 in the last 24 hours ## Weather - Conditions: Visual (VMC), Not reported - Wind: 100° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 90 °F, dew point 72 °F - Altimeter: 29.95 inHg - Observed at: ARG, 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 20050809017009A](https://openairdocs.org/incident/20050809017009A), Aug 9, 2005: Scwzer G164A, Corning, AR, Substantial damage. (-23) On August 9, 2005 at 1730 local time, N9041Q, a Grumman 164-A, agricultural spray plane, piloted by [privacy data omitted], a commercial pilot, [privacy… ## Other investigations on N9041Q (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 FTW95LA297](https://openairdocs.org/ntsb/FTW95LA297), Jul 13, 1995: Grumman G-164A (N9041Q), Osceola, AR, substantial damage. Probable cause: THE LOSS OF ENGINE POWER DUE TO A FAILED SUPERCHARGER/BLOWER. A FACTOR WAS THE LACK OF SUITABLE TERRAIN FOR A FORCED LANDING. 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.