# NTSB ATL07LA001: Grumman G-164, N493Y, Somerville, TN, October 4, 2006 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: October 4, 2006, 18:15 local (23:15 UTC) - Place: Somerville, TN - Coordinates: 35.470275, -89.917503 - Nearby events: https://openairdocs.org/map.md?lat=35.4703&lon=-89.9175&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor - Status: Completed, report March 31, 2008 - Report: Approved by Office Director - Parties: Memphis FSDO-25 - NTSB case key (mKey): 64661 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL07LA001 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/64661/pdf - Page: https://openairdocs.org/ntsb/ATL07LA001 ## Probable cause The total loss of engine power for undetermined reasons. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power, maneuvering - aerial application - reason for occurrence undetermined (cause) - Forced landing, emergency descent/landing - In flight collision with object, emergency descent/landing - object - tree(s) ## Analysis The pilot reported that he was conducting an aerial application flight. He stated that about half way through the third turn-around maneuver a gradual loss of power occurred. He added full throttle but did not notice the difference in the engine sound or the power output. He made a forced landing into a small field of trees and the airplane collided with the ground. The pilot exited the airplane, and an immediate post-crash fire consumed the airplane. Examination of the airplane by an FAA inspector revealed that all components for flight were located at the crash site. An examination of the engine revealed that all of its components were heavily fire damaged, and an engine examination could not be facilitated due to the fire damage. Due to the engine fire damage the cause of the loss of power could not be determined. ## Factual narrative On October 4, 2006, at 1815 central daylight time, a Grumman G-164, N493Y, registered to and operated by Fayette Flying Service LLC, as a 14 Code of Federal Regulation Part 137 aerial application flight, loss full engine power while maneuvering in the vicinity of Somerville, Tennessee. The airplane collided with a tree while making a force landing, and was substantially damaged by post-crash fire. Visual meteorological conditions prevailed and no flight plan was filed. The private pilot received minor injuries. The flight originated from the Fayette County Airport, Somerville, Tennessee, at 1750. The pilot reported that he was conducting an aerial application flight. He stated that about half way through the third turn-around maneuver a gradual loss of power occurred. He added full throttle but did not notice the difference in the engine sound or the power output. He made a forced landing into a small field of trees and the airplane collided with the ground. Examination of the airplane by an FAA inspector revealed that all components for flight were located at the crash site. An examination of the engine revealed that all of its components were heavily fire damaged, and an engine examination could not be facilitated due to the fire damage. A review of the engine logbook pages revealed that the engine was overhauled on July 27, 2006 at an engine total time of 524.7 hours. After the engine was reinstalled it was run for 1-hour. The owner of the airplane did not submit the airplane logbooks or records for review to the NTSB. ## Aircraft - Registration: [N493Y](https://openairdocs.org/deregistered/N493Y-2009-04-15), registration cancelled 2009-04-15, S/N 137, built 1962 (OpenAirDocs) - Reported make and model: Grumman G-164 - Registry model: [Grumman G-164](https://openairdocs.org/model/grumman-g-164) (registry code 3952702) (OpenAirDocs) - Registry engine: [Jacobs L4 /R755-7](https://openairdocs.org/engine/jacobs-l4-r755-7) (registry code 35003, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 137 - Airframe hours: 10081 - Engines: Pratt & Whitney R-985-14B 450 horsepower reciprocating - Damage: Destroyed - Fire: On-Ground - Flight: Aerial application, Part 137 - Registered owner: Fayette Flying Service LLC - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, February 1, 2006, 75 hours before - Departed: FYE, SOMERVILLE, TN - Destination: Somerville, TN - Airport: FYE, Fayette County ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 43; injuries: minor; private; airplane ratings: single-engine land; medical: class 2, with waivers/limitations; last flight review August 1, 2006; seat: single; flight hours: 1,000 total, 92 in this make and model, 970 as pilot in command, 95 in the last 90 days, 50 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 0° at 6 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 88 °F, dew point 61 °F - Altimeter: 30.09 inHg - Observed at: KMEM, 30 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 20061004020089A](https://openairdocs.org/incident/20061004020089A), Oct 4, 2006: Scwzer G164, Somerville, TN, Destroyed. (-23) Pilot experienced a loss of power while operating a part 137 aerial application. Aircraft destroyed in post accident fire. No injuries to pilot. ## Other investigations on N493Y (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 MIA73DLT13](https://openairdocs.org/ntsb/MIA73DLT13), Nov 6, 1972: Grumman G-164 (N493Y), Wynnburg, TN, substantial damage 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.