# Powerplant sys/comp malf/fail

- Type: NTSB defining event
- NTSB code: 340
- CICTT category: System/Component Failure (Powerplant)
- Defining event in: 627 cases
- In the sequence of: 820 cases
- Fatal cases: 48
- All cases: https://openairdocs.org/ntsb-events/340/cases.md
- Cases with it anywhere in the sequence: https://openairdocs.org/ntsb-events/340/sequence.md
- Page: https://openairdocs.org/ntsb-events/340

## Cases per year (defining / in the sequence)

- 2008: 48 / 62
- 2009: 35 / 57
- 2010: 20 / 28
- 2011: 28 / 37
- 2012: 28 / 36
- 2013: 21 / 40
- 2014: 20 / 36
- 2015: 26 / 36
- 2016: 33 / 50
- 2017: 28 / 40
- 2018: 29 / 38
- 2019: 37 / 46
- 2020: 21 / 30
- 2021: 28 / 35
- 2022: 48 / 55
- 2023: 50 / 57
- 2024: 57 / 60
- 2025: 36 / 41
- 2026: 34 / 36

## Phase of flight

- Enroute-cruise: 145 cases
- Initial climb: 113 cases
- Enroute: 80 cases
- Enroute-climb to cruise: 59 cases
- Takeoff: 46 cases
- Maneuvering-low-alt flying: 31 cases
- Approach: 29 cases
- Maneuvering: 23 cases
- Takeoff-rejected takeoff: 18 cases
- Approach-VFR pattern downwind: 11 cases

## In the probable cause of these cases

- [Recip eng cyl section](https://openairdocs.org/ntsb-findings/01058530) (Aircraft): 57 cases
- [Not determined, general](https://openairdocs.org/ntsb-findings/05000000) (Not determined): 35 cases
- [Oil](https://openairdocs.org/ntsb-findings/01071020) (Aircraft): 35 cases
- [Installation](https://openairdocs.org/ntsb-findings/02062035) (Personnel issues): 34 cases
- [Recip engine power section](https://openairdocs.org/ntsb-findings/01058520) (Aircraft): 31 cases
- [Scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010) (Personnel issues): 28 cases
- [Engine (reciprocating), general](https://openairdocs.org/ntsb-findings/01058500) (Aircraft): 25 cases
- [Power lever](https://openairdocs.org/ntsb-findings/01057603) (Aircraft): 23 cases
- [Recip eng oil sys](https://openairdocs.org/ntsb-findings/01058550) (Aircraft): 19 cases
- [Power plant, general](https://openairdocs.org/ntsb-findings/01057100) (Aircraft): 19 cases

## Aircraft models (registry)

- [Cessna 172N](https://openairdocs.org/model/cessna-172n): 8 cases
- [Beech A36](https://openairdocs.org/model/beech-a36): 8 cases
- [Robinson Helicopter R44](https://openairdocs.org/model/robinson-helicopter-r44): 6 cases
- [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a): 6 cases
- [Cirrus Design SR22](https://openairdocs.org/model/cirrus-design-sr22): 6 cases
- [Piper PA-28R-200](https://openairdocs.org/model/piper-pa-28r-200): 5 cases
- [Cessna 172R](https://openairdocs.org/model/cessna-172r): 5 cases
- [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta): 4 cases
- [Piper J3C-65](https://openairdocs.org/model/piper-j3c-65): 4 cases
- [Cessna T206H](https://openairdocs.org/model/cessna-t206h): 4 cases

## Newest cases

- [NTSB ENG27LA001](https://openairdocs.org/ntsb/ENG27LA001), Oct 6, 2026: Boeing 777-222 (N796UA), San Francisco, CA, incident, investigation ongoing
- [NTSB WPR27LA002](https://openairdocs.org/ntsb/WPR27LA002), Oct 4, 2026: Cessna P210N (N94PS), Stevensville, MT, investigation ongoing
- [NTSB CEN27LA004](https://openairdocs.org/ntsb/CEN27LA004), Oct 2, 2026: Cessna 414A (N1245A), Boerne, TX, investigation ongoing
- [NTSB ENG26WA042](https://openairdocs.org/ntsb/ENG26WA042), Sep 23, 2026: Boeing 737 (JA86AN), Naha, Japan, incident
- [NTSB ENG26WA043](https://openairdocs.org/ntsb/ENG26WA043), Sep 12, 2026: Airbus A321-271N (N542VL), Parque Industrial Mazatlán, Mexico, incident
- [NTSB DCA26WA349](https://openairdocs.org/ntsb/DCA26WA349), Sep 3, 2026: Boeing 747 (ER-BYK), Sharjah, United Arab Emirates, incident, minor damage
- [NTSB ENG26WA039](https://openairdocs.org/ntsb/ENG26WA039), Aug 18, 2026: Boeing 737 (XA-SSR), Cancun, Mexico, occurrence
- [NTSB ANC26LA088](https://openairdocs.org/ntsb/ANC26LA088), Aug 18, 2026: Cessna 172L (N3866Q), Micanopy, FL, substantial damage, investigation ongoing
- [NTSB ENG26FA034](https://openairdocs.org/ntsb/ENG26FA034), Aug 15, 2026: Boeing 747 (B-18725), Anchorage, AK, incident, minor damage, investigation ongoing
- [NTSB ENG26WA037](https://openairdocs.org/ntsb/ENG26WA037), Aug 14, 2026: Airbus A321 (XA-VXI), Chiapa de Corzo, Mexico, incident

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.

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