# NTSB FTW02LA079: Cessna 172N, N75616, Santa Fe, NM, February 8, 2002 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: February 8, 2002, 10:30 local (17:30 UTC) - Place: Santa Fe, NM - Coordinates: 35.469165, -106 - Nearby events: https://openairdocs.org/map.md?lat=35.4692&lon=-106.0000&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report April 1, 2003 - Report: Approved by Office Director - Parties: FAA FSDO - NTSB case key (mKey): 54168 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW02LA079 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/54168/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=54168 - Page: https://openairdocs.org/ntsb/FTW02LA079 ## Probable cause the loss of engine power as result of the failure of the dual magneto. A contributing factor was the lack of suitable terrain for the precautionary 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, cruise - ignition system,magneto - failure (cause) - Forced landing, descent - emergency - In flight collision with terrain/water, landing - roll - terrain condition - ditch - terrain condition - none suitable (contributing factor) - Nose over, landing - roll ## Analysis After reaching the intended cruise altitude during an instructional cross-country flight, the flight instructor noticed the airplane was not accelerating to the desired cruise speed. Within one or two minutes, after adjusting the mixture and applying carbuerator heat, the engine began to operate rough. The student pilot turned the airplane back toward the departure airport. As the flight proceeded, the engine roughness and power loss amplified. Approximately 9 miles southeast of the airport, the flight instructor elected to execute a precautionary landing to a dirt road. During the precautionary landing, the airplane touched down on the nose landing gear, and after impacting a ditch, the nose gear separated. The airplane then nosed over and came to rest inverted. During an examination of the engine, the single-drive dual magneto's lower timing inspection port was removed and approximately 2 cups of engine oil drained from the magneto. It was determined that the magneto driveshaft oil seal had failed allowing engine oil to enter the magneto. At the time of the accident, the engine had accumulated 2,030 hours since major overhaul. ## Factual narrative On February 8, 2002, approximately 1030 mountain standard time, a Cessna 172N single-engine airplane, N75616, was substantially damaged during a precautionary landing to a road following a loss of engine power near Santa Fe, New Mexico. The flight instructor and student pilot were not injured. The airplane was registered to and operated by Zia Aviation, Santa Fe. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 instructional flight. The cross-country flight departed Santa Fe Municipal Airport, Santa Fe, at 1010. In the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2), the flight instructor reported that he and the student pilot preformed a preflight inspection and an engine run-up prior to departure. No anomalies were noted with the engine during the inspection and run-up. During the takeoff roll, the student and instructor noticed a "slight [engine] roughness," the instructor "enriched the mixture," and the engine roughness ceased. After climbing approximately 300 to 500 feet per minute, the student leveled the airplane at 9,500 feet msl for cruise flight. The instructor reported that he noticed the airplane was not accelerating to the desired cruise speed. Within one or two minutes, after adjusting the mixture and applying carbuerator heat, the engine began to operate rough. The student pilot turned the airplane back toward Santa Fe with the intention to return to the airport. As the flight proceeded, the engine roughness and power loss amplified. Approximately 9 miles southeast of the airport, after realizing the airport could not be reached, the flight instructor elected to execute a precautionary landing to a dirt road. During the precautionary landing, the airplane touched down on the nose landing gear, and after impact with a ditch, the nose gear separated. The airplane then slid 50 to 100 feet, nosed over, and came to rest inverted. According to the FAA inspector, who responded to the accident site, both wings and the firewall were substantially damaged. The aircraft was recovered to a hangar for further examination. On February 11, 2002, the flight instructor, who was also a certified mechanic and maintained the airplane, and the FAA inspector examined the Lycoming O-320-H2AD (serial number L5684-76) engine. During an ignition timing check, the engine crankshaft was rotated by hand; however, "the apparent spark from each of the 8 leads was not what would be expected from this system." The Continental/Bendix D-3000 single-drive dual magneto's lower timing inspection port was removed and approximately 2 cups of engine oil drained from the magneto. It was determined that the magneto driveshaft oil seal had failed allowing engine oil to enter the magneto. A review of the maintanence records revealed that the last annual inspection was completed on May 11, 2001, at 1,515.89 hours since major overhaul. At the time of the accident, the engine had accumulated 2,030 hours since major overhaul. ## Aircraft - Registration: [N75616](https://openairdocs.org/deregistered/N75616-2012-10-31), registration cancelled 2012-10-31, S/N 17267852, built 1976 (OpenAirDocs) - Reported make and model: Cessna 172N - Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (registry code 2072434) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 17267852 - Airframe hours: 7397 - Engines: Lycoming O-320-H2AD 150 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Registered owner: Zia Aviation - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, December 21, 2001, 61 hours before - Departed: SAF, Santa Fe, NM - Destination: SAF, Santa Fe, NM ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 55; injuries: none; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; last flight review August 30, 2001; seat: right; flight hours: 2,040 total, 953 in this make and model, 1,713 as pilot in command, 129 in the last 90 days, 32 in the last 30 days, 2 in the last 24 hours - Student pilot; age 48; injuries: none; student; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 48 total, 48 in this make and model, 2 as pilot in command, 15 in the last 90 days, 1 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 12 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 30 °F ## 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 20020208000799A](https://openairdocs.org/incident/20020208000799A), Feb 8, 2002: Cessna 172N, Santa Fe, NM, Substantial damage. (.19) On February 8, 2002, approximately 1030 mountain standard time, a Cessna 172N single-engine airplane, N75616, was substantially damaged during a forced… ## Docket (4 files) The files NTSB released with the investigation on December 3, 2002, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=54168. 2.9 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1/2 (item 1, .PDF, 2.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40387717&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1%2F2-Redacted.PDF - 6120.1/2 Attachment (item 2, .PDF, 149 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40387718&FileExtension=.PDF&FileName=6120.1%2F2%20Attachment-Redacted.PDF - FAA Inspector Statement (item 3, .PDF, 247 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40171686&FileExtension=.PDF&FileName=FAA%20Inspector%20Statement-Master.PDF - Excerpts from Engine Logbook (item 4, .PDF, 363 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40387719&FileExtension=.PDF&FileName=Excerpts%20from%20Engine%20Logbook-Redacted.PDF 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.