# NTSB DFW05CA219: Cessna 172R, N93AF, Springtown, TX, August 21, 2005 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: August 21, 2005, 09:30 local (14:30 UTC) - Place: Springtown, TX - Coordinates: 32.98389, -97.616943 - Nearby events: https://openairdocs.org/map.md?lat=32.9839&lon=-97.6169&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report December 20, 2005 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 62309 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DFW05CA219 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/62309/pdf - Page: https://openairdocs.org/ntsb/DFW05CA219 ## Probable cause The pilot's improper decision to shut down the engine. Contributing factors were the failure of the oil pressure switch and the lack of a suitable landing area. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, cruise - lubricating system,oil seal - ruptured (contributing factor) - Loss of engine power(total) - nonmechanical, descent - normal - in-flight planning/decision - improper, pilot in command (cause) - Forced landing, emergency descent/landing - Nose gear collapsed, landing - terrain condition - none suitable (contributing factor) ## Analysis While in cruise flight at an altitude of 6,500 feet, the 404-hour private pilot noticed a "mist" forming on the windscreen. He decided to return to the airport from which he had departed and began a descent. During the descent the oil pressure light illuminated and the pilot observed that the "oil temperature was very high." The pilot then elected to shut down the engine. Realizing that he could not reach the airport, he proceeded to search for a suitable landing field. After attempting to declare an emergency, he selected a landing field and turned towards it. Observing power lines in his path, the pilot restarted the engine in an attempt to avoid contacting them. The airplane's "engine responded with very little effect," but the pilot was able to clear the power lines and landed in a field. During landing, the nose landing gear collapsed and the airplane nosed over, coming to rest in an inverted position. An examination of the engine revealed that the engine oil pressure switch, (P/N 83278), had failed internally which allowed engine oil to vent overboard. No other pre-impact anomalies were noted with the engine. At the time of recovery the engine oil sump contained approximately six quarts of engine oil. The Cessna 172R Skyhawk Information Manual dated December 2, 1996, page 3-20 stated: "If a total loss of oil pressure is accompanied by a rise in oil temperature, there is good reason to suspect an engine failure is imminent. Reduce engine power immediately and select a suitable forced landing field. Use only the minimum power required to reach the desired touchdown spot." ## Factual narrative On August 21, 2005, about 0930 central daylight time, a single-engine Cessna 172R airplane, N93AF, was substantially damaged during a forced landing following a loss of engine power near Springtown, Texas. The instrument rated private pilot, the sole occupant of the airplane, was not injured. The airplane was registered to and operated by American Flyers Schools, Inc., of Pompano Beach, Florida. Visual meteorological conditions prevailed and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal flight. The cross-country flight originated from the Meacham International Airport (FTW), near Fort Worth, Texas, at 0900, and was destined for the Levelland Municipal Airport (LLN), near Levelland, Texas. According to the pilot, after departing FTW he climbed to an altitude of 6,500 feet. While in cruise flight, approximately ten miles west of Springtown, Texas, he noticed a "mist" forming on the windscreen. He elected to return to FTW and began a descent. During the descent the oil pressure light illuminated and the pilot observed that the "oil temperature was very high." The pilot then elected to shut down the engine. Realizing that he could not reach the airport, he proceeded to search for a suitable landing area. After he attempted to contact Meacham tower to declare an emergency he selected a landing field. Observing power lines in his path, the pilot restarted the engine in an attempt to avoid contacting them. The airplane's "engine responded with very little effect," but the pilot was able to clear the power lines and landed in a field. During landing, the nose landing gear collapsed and the airplane nosed over, coming to rest in an inverted position. A Federal Aviation Administration (FAA) inspector responded to the accident site and reported that the airplane's wings, vertical stabilizer, and engine firewall had sustained structural damage. The inspector also reported that the engine oil sump contained approximately six quarts of engine oil at the time of recovery. An examination of the engine by representatives from the NTSB and Cessna Aircraft Company, revealed that the engine oil pressure switch, (P/N 83278), had failed internally which allowed engine oil to vent overboard. A review of the engine logbooks suggested that the total time on the pressure switch was approximately 5,321 hours. NTSB investigators manually rotated the engine and obtained thumb compression on all cylinders. The engine rotated freely and continuity was established to all valves and accessory case gears. The left and right magnetos produced spark through each spark plug lead to all spark plugs, with the exception of the number one cylinder top spark plug lead, which had sustained damaged during the accident. The Cessna 172R Skyhawk Information Manual dated December 2, 1996, page 3-20 stated: "If a total loss of oil pressure is accompanied by a rise in oil temperature, there is good reason to suspect an engine failure is imminent. Reduce engine power immediately and select a suitable forced landing field. Use only the minimum power required to reach the desired touchdown spot." ## Aircraft - Registration: [N93AF](https://openairdocs.org/deregistered/N93AF-2017-06-22), registration cancelled 2017-06-22, S/N 17280073, built 1997 (OpenAirDocs) - Reported make and model: Cessna 172R - Registry model: [Cessna 172R](https://openairdocs.org/model/cessna-172r) (registry code 2072401) (OpenAirDocs) - Registry engine: [Lycoming I0360 SER A&C](https://openairdocs.org/engine/lycoming-i0360-ser-a-c) (registry code 41511, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 17280073 - Airframe hours: 8521 - Engines: Lycoming IO-360 160 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: American Flyers Schools, Inc. - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, August 1, 2005, 61 hours before - Departed: FTW, FORT WORTH, TX - Destination: LLN, Levelland, TX ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 21; injuries: none; private; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1; last flight review June 1, 2005; seat: left; flight hours: 404 total, 134 in this make and model, 335 as pilot in command, 62 in the last 90 days, 26 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 10° at 7 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 84 °F - Altimeter: 30.10 inHg ## 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 20050821019679A](https://openairdocs.org/incident/20050821019679A), Aug 21, 2005: Cessna 172R, Springtown, TX, Destroyed. (-23) Pilot was conducting a cross country flight from ftw to lbb. At cruise altitude, 6500 feet, he reported that he noted that oil pressure decreased while… 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.