# NTSB CEN16LA177: Boeing A75N1 (PT17), N17PY, Osage City, KS, April 28, 2016 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: April 28, 2016, 15:10 local (20:10 UTC) - Place: Osage City, KS - Coordinates: 38.641387, -95.802497 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=38.6414&lon=-95.8025&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Defining event: [Initial climb: Fuel related](https://openairdocs.org/ntsb-events/190) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed, report September 11, 2018 - Report: Approved by Office Director - NTSB office: Central Region - Parties: FAA Wichita FSDO - SAIBs cited in the narratives: [SAIB CE-09-35](https://openairdocs.org/saib/CE-09-35) (OpenAirDocs) - NTSB case key (mKey): 93133 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN16LA177 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/93133/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=93133 - Page: https://openairdocs.org/ntsb/CEN16LA177 ## Probable cause A partial loss of engine power for reasons that could not be determined based on the available information. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Boeing A75N1(PT17), 8 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=1380134), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) - [Engine (reciprocating)](https://openairdocs.org/ntsb-findings/01058500): Aircraft › Aircraft power plant · Damaged/degraded (probable cause); cases with it: [Boeing A75N1(PT17), 1 case](https://openairdocs.org/ntsb-findings/01058500/cases.md?model=1380134), [All aircraft, 497 cases](https://openairdocs.org/ntsb-findings/01058500/cases.md) - [Ice/rain protection system: intake anti-ice, deice](https://openairdocs.org/ntsb-findings/01023020): Aircraft › Aircraft systems · Not used/operated; cases with it: [Boeing A75N1(PT17), 1 case](https://openairdocs.org/ntsb-findings/01023020/cases.md?model=1380134), [All aircraft, 108 cases](https://openairdocs.org/ntsb-findings/01023020/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Initial climb: Fuel related](https://openairdocs.org/ntsb-events/190) (defining event); cases with it: [Boeing A75N1(PT17), 2 cases](https://openairdocs.org/ntsb-events/190/sequence.md?model=1380134), [All aircraft, 361 cases](https://openairdocs.org/ntsb-events/190/sequence.md) - [Landing: Off-field or emergency landing](https://openairdocs.org/ntsb-events/440); cases with it: [Boeing A75N1(PT17), 4 cases](https://openairdocs.org/ntsb-events/440/sequence.md?model=1380134), [All aircraft, 3,365 cases](https://openairdocs.org/ntsb-events/440/sequence.md) - [Landing: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Boeing A75N1(PT17), 2 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=1380134), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis The airplane departed on a parachute jump flight with the airline transport pilot seated in the rear cockpit and two parachutists standing outside on the lower wing. About 200 ft above ground level, the pilot sensed a loss of engine power and the airplane stopped climbing. The airplane descended, and the pilot conducted an off-airport forced landing to a flat, open, muddy field about 1,600 ft north of the airport, during which the main landing gear separated from the airframe. A postaccident examination of the airplane revealed no anomalies. Review of weather information for the area at the time of the accident indicated that conditions were conducive to the accumulation of serious icing at glide power settings; however, the airplane was operating at takeoff power at the time of the accident, and the reason for the loss of engine power could not be determined. ## Factual narrative On April 28, 2016, about 1510 central daylight time, a Boeing A75N1 (PT-17) single-engine airplane, N17PY, impacted terrain after a loss of engine power shortly after departing the Osage City Municipal Airport (53K), Osage City, Kansas. The pilot and two passengers were not injured, and the airplane was substantially damaged. The airplane was registered to, and operated by a private individual, as a 14 Code of Federal Regulations Part 91 sport parachuting flight. Visual meteorological conditions (VMC) prevailed and a flight plan had not been filed. At the time of the accident the airplane had just departed 53K for the skydiving flight .The airplane departed with the pilot seated in the rear cockpit and with two parachutists standing outside, on the lower wing. The parachutists held on to the edge of the front cockpit and were secured by a safety strap. .After the airplane climbed to about 200 ft agl (above ground level), the pilot sensed a loss of engine power and the airplane stopped climbing. The airplane descended and the pilot executed an off-airport forced landing to a flat open field about 1,600 feet north of 53K. The airplane cleared the top of 32-foot tall electric power lines and came to rest upright, about 100 feet from the initial touchdown spot. The airplane landed hard with the muddy field resulted in the complete separation of both main landing gear legs . The two parachutists reported that they were not ejected and remained restrained by the safety strap. A postaccident examination of the airplane at the scene revealed that there was substantial damage to the lower wing and fuselage. The examination noted that there was adequate fuel on board, no fuel spill, and no postimpact fire. Flight control continuity was confirmed. The pilot said he did not use carburetor heat . An examination of the engine and its components showed no anomalies. An inspection and testing of the engine spark plugs indicated normal wear and that they were fully functional. The wiring harness was visually inspected and appeared normal. A bench test of both magnetos showed they were fully functional. The closest weather reporting station was at FOE, Topeka, Kansas; located 20 miles northeast from the accident location, At 1453 the automated surface observation system at FOE recorded wind from 330 degrees at 13 knots, visibility 10 miles, scattered clouds at 2,700 ft above ground level, temperature 16 ° Celsius (C), dew point 8 ° C, and an altimeter setting of 29.96 inches of Mercury. A review of the carburetor icing probability chart in Federal Aviation Administration, Special Information Bulletin CE-09-35, revealed the airplane was operating in an area favorable for serious icing at glide power. ## Aircraft - Registration: [N17PY](https://openairdocs.org/deregistered/N17PY-2016-07-25), registration cancelled 2016-07-25, S/N 75-5554, built 1942 (OpenAirDocs) - Reported make and model: BOEING A75N1 (PT17) - Registry model: [Boeing A75N1(PT17)](https://openairdocs.org/model/boeing-a75n1-pt17) (registry code 1380134) (OpenAirDocs) - Registry engine: [Continental W670 series](https://openairdocs.org/engine/continental-w670-series) (registry code 17018, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 75-5554 - Year built: 1942 - Airframe hours: 6679 - Engines: Continental W670-6A 220 horsepower reciprocating - Damage: Substantial damage - Flight: Skydiving, Part 91 - Airworthiness certificate: Standard, Utility; Standard, Aerobatic; Standard, Normal - Last inspection: Annual, February 11, 2016, 26 hours before - Departed: 53K, Osage City, KS - Destination: 53K, Osage City, KS - Airport: 53K, Osage City Muni, runway 35, 2,560 × 40 ft, asphalt - Equipment: Unknown ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 37; injuries: none; commercial, airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, with waivers/limitations; last flight review November 23, 2015; seat: rear; restraint: 4-point; flight hours: 8,625 total, 85 in this make and model, 4,088 as pilot in command, 35 in the last 90 days, 20 in the last 30 days, 7 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 330° at 13 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 61 °F, dew point 46 °F - Altimeter: 29.95 inHg - Observed at: KFOE, 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 20160428006389A](https://openairdocs.org/incident/20160428006389A), Apr 28, 2016: Boeing A75N1(PT17), Osage City, KS, Substantial damage. On Thursday April 28, 2016 at about 3:10 pm CST a Boeing A75N1, N17PY took off from Osage City, KS (53K) with a pilot and two skydivers (one squatting on each… ## Docket (15 files) The files NTSB released with the investigation on May 7, 2018, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=93133. 3.3 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 625 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462987&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - FAA Inspector's Record of Pilot Interview (item 2, .PDF, 69 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462988&FileExtension=.PDF&FileName=FAA%20Inspector%27s%20Record%20of%20Pilot%20Interview-Master.PDF - Witness Statement, Nathaniel Perlman (item 3, .PDF, 44 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462989&FileExtension=.PDF&FileName=Witness%20Statement,%20Nathaniel%20Perlman-Master.PDF - Witness Statement, Ray Lallo (item 4, .PDF, 55 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462990&FileExtension=.PDF&FileName=Witness%20Statement,%20Ray%20Lallo-Master.PDF - Witness Statement, William Hubbell (item 5, .PDF, 69 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462991&FileExtension=.PDF&FileName=Witness%20Statement,%20William%20Hubbell-Master.PDF - Witness Statement, Todd Wiggins (item 6, .PDF, 68 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462992&FileExtension=.PDF&FileName=Witness%20Statement,%20Todd%20Wiggins-Master.PDF - Statement, Scott Davis and Dave Brecheisen (item 7, .PDF, 41 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462993&FileExtension=.PDF&FileName=Statement,%20Scott%20Davis%20and%20Dave%20Brecheisen-Master.PDF - Map, Osage City Airport, Kansas (item 8, .PDF, 197 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462994&FileExtension=.PDF&FileName=Map,%20Osage%20City%20Airport,%20Kansas-Master.PDF - Google Earth, Accident Location (item 9, .PDF, 948 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462995&FileExtension=.PDF&FileName=Google%20Earth,%20Accident%20Location-Master.PDF - Kansas Highway Patrol Incident Report (item 10, .PDF, 223 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462996&FileExtension=.PDF&FileName=Kansas%20Highway%20Patrol%20Incident%20Report-Master.PDF - Spark Plug Examination Results (item 11, .PDF, 206 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462997&FileExtension=.PDF&FileName=Spark%20Plug%20Examination%20Results-Master.PDF - Magnetos Examination Notes (item 12, .PDF, 87 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462998&FileExtension=.PDF&FileName=Magnetos%20Examination%20Notes-Master.PDF - Weather Information, Topeka Forbes Airport, Kansas (item 13, .PDF, 151 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462999&FileExtension=.PDF&FileName=Weather%20Information,%20Topeka%20Forbes%20Airport,%20Kansas-Master.PDF - Carburetor Icing Probability Chart (item 14, .PDF, 68 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40463000&FileExtension=.PDF&FileName=Carburetor%20Icing%20Probability%20Chart-Master.PDF - Photo of Accident Scene (item 15, .PDF, 1 photo, 424 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40463001&FileExtension=.PDF&FileName=Photo%20of%20Accident%20Scene-Master.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.