# Equipment manufacture - Type: NTSB finding subsection - Path: [Organizational issues](https://openairdocs.org/ntsb-findings/04) › [Development](https://openairdocs.org/ntsb-findings/0401) › [Manufacture/production](https://openairdocs.org/ntsb-findings/040130) › Equipment manufacture - NTSB code: 04013010 - Cases: 36 - In the probable cause: 31 - Fatal cases: 4 - All cases: https://openairdocs.org/ntsb-findings/04013010/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/04013010/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/04013010 ## Cases per year (in the probable cause / all) - 2008: 2 / 2 - 2010: 4 / 4 - 2011: 3 / 4 - 2012: 1 / 2 - 2013: 2 / 2 - 2014: 2 / 2 - 2015: 2 / 2 - 2016: 1 / 2 - 2017: 1 / 1 - 2018: 2 / 2 - 2020: 0 / 1 - 2022: 1 / 2 - 2023: 5 / 5 - 2024: 4 / 4 - 2025: 1 / 1 ## Defining events in these cases - [Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340): 6 cases - [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 4 cases - [Part(s) separation from AC](https://openairdocs.org/ntsb-events/338): 4 cases - [Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330): 4 cases - [Uncontained engine failure](https://openairdocs.org/ntsb-events/343): 3 cases - [Fire/smoke (non-impact)](https://openairdocs.org/ntsb-events/150): 3 cases - [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 2 cases - [Flight control sys malf/fail](https://openairdocs.org/ntsb-events/333): 2 cases - [Aircraft structural failure](https://openairdocs.org/ntsb-events/337): 1 cases - [Electrical system malf/failure](https://openairdocs.org/ntsb-events/332): 1 cases ## Aircraft models (registry) - [Boeing 757-223](https://openairdocs.org/model/boeing-757-223): 2 cases - [Flight Design CTLS](https://openairdocs.org/model/flight-design-ctls): 2 cases - [Agustawestland Philadelphia AW139](https://openairdocs.org/model/agustawestland-philadelphia-aw139): 2 cases - [Socata TBM 700](https://openairdocs.org/model/socata-tbm-700): 1 cases - [Asbell William E PITTS S-1E](https://openairdocs.org/model/asbell-william-e-pitts-s-1e): 1 cases - [Piper PA-32R-301](https://openairdocs.org/model/piper-pa-32r-301): 1 cases - [Piper PA-28R-200](https://openairdocs.org/model/piper-pa-28r-200): 1 cases - [Piper PA-28-181](https://openairdocs.org/model/piper-pa-28-181): 1 cases - [Piper PA-28-161](https://openairdocs.org/model/piper-pa-28-161): 1 cases - [Piper PA-25-235](https://openairdocs.org/model/piper-pa-25-235): 1 cases ## Other findings in the same cases - [Equipment design](https://openairdocs.org/ntsb-findings/04011010) (Organizational issues): 3 cases - [Recip eng cyl section](https://openairdocs.org/ntsb-findings/01058530) (Aircraft): 3 cases - [Turbine section](https://openairdocs.org/ntsb-findings/01057250) (Aircraft): 3 cases - [Propeller blade section](https://openairdocs.org/ntsb-findings/01046111) (Aircraft): 3 cases - [Main gear strut/axle/truck](https://openairdocs.org/ntsb-findings/01023213) (Aircraft): 3 cases - [Availability of policy/proc](https://openairdocs.org/ntsb-findings/04021010) (Organizational issues): 2 cases - [Document/info production](https://openairdocs.org/ntsb-findings/04013020) (Organizational issues): 2 cases - [Fuel control/carburetor](https://openairdocs.org/ntsb-findings/01057322) (Aircraft): 2 cases - [Propeller assembly](https://openairdocs.org/ntsb-findings/01046110) (Aircraft): 2 cases - [Main landing gear](https://openairdocs.org/ntsb-findings/01023210) (Aircraft): 2 cases ## Newest cases - [NTSB CEN25LA117](https://openairdocs.org/ntsb/CEN25LA117), Mar 10, 2025: Vans RV-7A (N923ZA), Plainview, TX, substantial damage. Probable cause: The improper machining of the propeller blade bearing seat, which resulted in an inflight propeller blade fatigue failure. Contributing to the accident was the improper machining of the propeller hub… - [NTSB CEN25LA043](https://openairdocs.org/ntsb/CEN25LA043), Nov 17, 2024: Pitts S1E (N52B), Seguin, TX, substantial damage. Probable cause: The improper construction of the rudder cable assembly by the airplane builder, which resulted in the fatigue failure of the left rudder cable during the landing roll and the pilot’s subsequent… - [NTSB ERA24LA392](https://openairdocs.org/ntsb/ERA24LA392), Sep 23, 2024: Piper PA28 (N4298V), LaGrange, GA, substantial damage. Probable cause: Improper manufacture of a cylinder exhaust valve guide by the engine manufacturer, which resulted in a stuck exhaust valve and a partial loss of engine power during initial climb. - [NTSB CEN24FA218](https://openairdocs.org/ntsb/CEN24FA218), Jun 12, 2024: Cessna 172 (N656MA), Gainesville, TX, substantial damage, 1 fatal. Probable cause: The fuel pump manufacturer’s improper torquing of screws on the engine-driven fuel pump, which resulted in a disruption in the fuel system and a loss of engine power on initial climb. - [NTSB CEN24LA121](https://openairdocs.org/ntsb/CEN24LA121), Feb 25, 2024: Piper PA-28-181 (N38696), Watertown, SD, substantial damage. Probable cause: The stuck No. 2 cylinder exhaust valve, which resulted in a partial loss of engine power and a forced landing due to an undersized exhaust valve guide. Contributing to the accident were the improper… - [NTSB ERA24LA066](https://openairdocs.org/ntsb/ERA24LA066), Dec 15, 2023: Diamond Aircraft Ind DA 40 NG (N907L), Asheville, NC, substantial damage. Probable cause: Fatigue failure of the No. 4 inner main bearing cap screw and connecting rod bolts, which resulted in a total loss of engine power. Contributing to the failure were the low material strength of the… - [NTSB WPR24FA053](https://openairdocs.org/ntsb/WPR24FA053), Dec 8, 2023: Beauchamp Norm Kitfox (N66180), Eloy, AZ, destroyed, 1 fatal. Probable cause: The separation of a propeller blade during the initial climb due to insufficient blade retention forces. Contributing to the accident was the propeller blade retention design, manufacturing defects… - [NTSB ENG24FA003](https://openairdocs.org/ntsb/ENG24FA003), Oct 18, 2023: Boeing 767-300F (N287FE), Memphis, TN, incident, minor damage. Probable cause: A high-pressure fuel leak from a gap in the bolted flange interface between the main fuel pump’s fuel crossover supply tube and the hydromechanical unit idler adapter pad, which resulted in the… - [NTSB WPR23LA270](https://openairdocs.org/ntsb/WPR23LA270), Jul 11, 2023: Sling Sling LSA (N294JY), Palm Springs, CA, substantial damage. Probable cause: Failure of the landing gear strut during takeoff due to a preexisting cracks that were caused by a manufacturing anomaly during the composite fiber layup process. - [NTSB ERA23LA293](https://openairdocs.org/ntsb/ERA23LA293), Jul 9, 2023: Hughes 369D (N5027P), Waldorf, MD, substantial damage. Probable cause: Fatigue failure of the overrunning clutch outer race and a subsequent inflight loss of power due to abnormal bending loads as a result of improper reassembly of the clutch subassembly following… 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.