# Loss of engine power (partial) - Type: NTSB defining event - NTSB code: 342 - CICTT category: System/Component Failure (Powerplant) - Defining event in: 1,421 cases - In the sequence of: 1,858 cases - Fatal cases: 148 - All cases: https://openairdocs.org/ntsb-events/342/cases.md - Cases with it anywhere in the sequence: https://openairdocs.org/ntsb-events/342/sequence.md - Page: https://openairdocs.org/ntsb-events/342 ## Cases per year (defining / in the sequence) - 2008: 75 / 99 - 2009: 75 / 116 - 2010: 78 / 105 - 2011: 88 / 118 - 2012: 95 / 124 - 2013: 62 / 82 - 2014: 88 / 114 - 2015: 89 / 115 - 2016: 82 / 108 - 2017: 66 / 99 - 2018: 77 / 98 - 2019: 81 / 105 - 2020: 58 / 72 - 2021: 78 / 111 - 2022: 53 / 80 - 2023: 64 / 75 - 2024: 70 / 81 - 2025: 81 / 88 - 2026: 61 / 68 ## Phase of flight - Initial climb: 400 cases - Enroute-cruise: 232 cases - Takeoff: 213 cases - Enroute: 146 cases - Maneuvering: 84 cases - Maneuvering-low-alt flying: 73 cases - Enroute-climb to cruise: 56 cases - Approach: 39 cases - Approach-VFR pattern final: 35 cases - Enroute-descent: 23 cases ## In the probable cause of these cases - [Not determined, general](https://openairdocs.org/ntsb-findings/05000000) (Not determined): 375 cases - [Recip eng cyl section](https://openairdocs.org/ntsb-findings/01058530) (Aircraft): 124 cases - [Engine (reciprocating), general](https://openairdocs.org/ntsb-findings/01058500) (Aircraft): 108 cases - [Conducive to carburetor icing](https://openairdocs.org/ntsb-findings/03031030) (Environmental issues): 93 cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 89 cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 75 cases - [Fuel control/carburetor](https://openairdocs.org/ntsb-findings/01057322) (Aircraft): 57 cases - [Use of equip/system](https://openairdocs.org/ntsb-findings/02063015) (Personnel issues): 52 cases - [Airspeed](https://openairdocs.org/ntsb-findings/01062010) (Aircraft): 48 cases - [Installation](https://openairdocs.org/ntsb-findings/02062035) (Personnel issues): 44 cases ## Aircraft models (registry) - [Piper PA-28-140](https://openairdocs.org/model/piper-pa-28-140): 37 cases - [Cessna 172N](https://openairdocs.org/model/cessna-172n): 19 cases - [Cessna 152](https://openairdocs.org/model/cessna-152): 15 cases - [Piper PA-28-180](https://openairdocs.org/model/piper-pa-28-180): 14 cases - [Robinson Helicopter R44 II](https://openairdocs.org/model/robinson-helicopter-r44-ii): 11 cases - [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150): 11 cases - [Cirrus Design SR22](https://openairdocs.org/model/cirrus-design-sr22): 11 cases - [Cessna 172M](https://openairdocs.org/model/cessna-172m): 11 cases - [Cessna 150M](https://openairdocs.org/model/cessna-150m): 10 cases - [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta): 9 cases ## Newest cases - [NTSB CEN27LA029](https://openairdocs.org/ntsb/CEN27LA029), Oct 22, 2026: Piper PA-28 (N5393W), Claremore, OK, investigation ongoing - [NTSB ERA27LA007](https://openairdocs.org/ntsb/ERA27LA007), Oct 7, 2026: Piper PA-32-260 (N31RF), Whiteville, NC, investigation ongoing - [NTSB WPR27LA008](https://openairdocs.org/ntsb/WPR27LA008), Oct 4, 2026: Hakala John Charles Lancair IV-P-T (N5UC), Ontario, OR, investigation ongoing - [NTSB CEN26LA330](https://openairdocs.org/ntsb/CEN26LA330), Sep 29, 2026: Cessna 152 (N69009), Bolingbrook, IL, investigation ongoing - [NTSB CEN26LA327](https://openairdocs.org/ntsb/CEN26LA327), Sep 27, 2026: Haberman Habercraft (N10516), Pelican Rapids, MN, substantial damage, investigation ongoing - [NTSB ERA26LA348](https://openairdocs.org/ntsb/ERA26LA348), Sep 20, 2026: Hopwood Joseph R Zodiac (N601LL), Stockton, AL, substantial damage, investigation ongoing - [NTSB WPR26LA347](https://openairdocs.org/ntsb/WPR26LA347), Sep 18, 2026: Bell 206B-III (N50141), Creswell, NC, substantial damage, investigation ongoing - [NTSB CEN26LA322](https://openairdocs.org/ntsb/CEN26LA322), Sep 16, 2026: Cessna 172M (N9909Q), Hanover, IN, substantial damage, investigation ongoing - [NTSB ANC26LA103](https://openairdocs.org/ntsb/ANC26LA103), Sep 11, 2026: Robinson Helicopter R44 II (N4026E), Colquitt, GA, substantial damage, investigation ongoing - [NTSB WPR26LA335](https://openairdocs.org/ntsb/WPR26LA335), Sep 10, 2026: Cessna 210 (N9517T), Polson, MT, substantial damage, investigation ongoing NTSB has coded findings and defining events since 2008; earlier cases used its older occurrence and cause codes and aren't counted. Findings: https://openairdocs.org/ntsb-findings.md. Defining events: https://openairdocs.org/ntsb-events.md. Phases of flight: https://openairdocs.org/ntsb-phases.md. Every investigation, filtered by finding, event, phase, state, year or model: https://openairdocs.org/ntsb.md (for example ?state=MI&fatal=1). NTSB's definitions: Accident and incident, 49 CFR 830.2 (https://www.ecfr.gov/current/title-49/subtitle-B/chapter-VIII/part-830/subpart-A/section-830.2), CICTT occurrence categories (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/OccurrenceCategoryDefinitions.pdf), CICTT phases of flight (PDF) (https://www.ntsb.gov/safety/data/Documents/datafiles/PhaseofFlightDefinitions.pdf), and NTSB coding manual, before 2008 (PDF) (https://www.ntsb.gov/GILS/Documents/codman.pdf). NTSB publishes no definitions for its findings, only their names. --- 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.