# Scheduled/routine maintenance - Type: NTSB finding subsection - Path: [Personnel issues](https://openairdocs.org/ntsb-findings/02) › [Task performance](https://openairdocs.org/ntsb-findings/0206) › [Maintenance](https://openairdocs.org/ntsb-findings/020620) › Scheduled/routine maintenance - NTSB code: 02062010 - Cases: 320 - In the probable cause: 274 - Fatal cases: 39 - All cases: https://openairdocs.org/ntsb-findings/02062010/cases.md - Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/02062010/cases.md?cause=1 - Page: https://openairdocs.org/ntsb-findings/02062010 ## Cases per year (in the probable cause / all) - 2008: 6 / 7 - 2009: 12 / 14 - 2010: 15 / 17 - 2011: 17 / 19 - 2012: 17 / 20 - 2013: 19 / 21 - 2014: 15 / 17 - 2015: 21 / 24 - 2016: 20 / 21 - 2017: 24 / 27 - 2018: 18 / 20 - 2019: 15 / 19 - 2020: 13 / 16 - 2021: 11 / 15 - 2022: 13 / 18 - 2023: 16 / 19 - 2024: 19 / 22 - 2025: 3 / 4 ## Defining events in these cases - [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 63 cases - [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 47 cases - [Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330): 41 cases - [Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340): 32 cases - [Landing gear collapse](https://openairdocs.org/ntsb-events/094): 21 cases - [Flight control sys malf/fail](https://openairdocs.org/ntsb-events/333): 19 cases - [Part(s) separation from AC](https://openairdocs.org/ntsb-events/338): 12 cases - [Fuel starvation](https://openairdocs.org/ntsb-events/191): 11 cases - [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 8 cases - [Fire/smoke (non-impact)](https://openairdocs.org/ntsb-events/150): 8 cases ## Aircraft models (registry) - [Piper PA-28-140](https://openairdocs.org/model/piper-pa-28-140): 9 cases - [Piper PA-28-180](https://openairdocs.org/model/piper-pa-28-180): 6 cases - [Cessna 172N](https://openairdocs.org/model/cessna-172n): 6 cases - [Robinson Helicopter R44](https://openairdocs.org/model/robinson-helicopter-r44): 4 cases - [Piper PA-28R-200](https://openairdocs.org/model/piper-pa-28r-200): 4 cases - [Cirrus Design SR22](https://openairdocs.org/model/cirrus-design-sr22): 4 cases - [Bell 206B](https://openairdocs.org/model/bell-206b): 4 cases - [Schweizer 269C-1](https://openairdocs.org/model/schweizer-269c-1): 3 cases - [Schweizer 269C](https://openairdocs.org/model/schweizer-269c): 3 cases - [Piper PA-30](https://openairdocs.org/model/piper-pa-30): 3 cases ## Other findings in the same cases - [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 26 cases - [Recip eng cyl section](https://openairdocs.org/ntsb-findings/01058530) (Aircraft): 25 cases - [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 23 cases - [Fuel](https://openairdocs.org/ntsb-findings/01071010) (Aircraft): 21 cases - [Scheduled maint checks](https://openairdocs.org/ntsb-findings/01010520) (Aircraft): 21 cases - [Scheduled/routine inspection](https://openairdocs.org/ntsb-findings/02061520) (Personnel issues): 20 cases - [Preflight inspection](https://openairdocs.org/ntsb-findings/02061510) (Personnel issues): 19 cases - [Engine (reciprocating), general](https://openairdocs.org/ntsb-findings/01058500) (Aircraft): 16 cases - [Oil](https://openairdocs.org/ntsb-findings/01071020) (Aircraft): 14 cases - [Gear extension and retract sys](https://openairdocs.org/ntsb-findings/01023230) (Aircraft): 14 cases ## Newest cases - [NTSB ANC25LA059](https://openairdocs.org/ntsb/ANC25LA059), Jun 25, 2025: Cessna 170B (N2655D), Denali Park, AK, substantial damage. Probable cause: The failure of the left main landing gear spring due to a fatigue fracture during landing on uneven terrain. - [NTSB ERA25LA198](https://openairdocs.org/ntsb/ERA25LA198), May 7, 2025: Diamond Aircraft Ind DA 40 NG (N499BW), Sanford, NC, substantial damage. Probable cause: The mechanic’s re-use of worm drive clamps, which resulted in a separation of the turbocharger air discharge duct and a partial loss of engine power during initial climb. - [NTSB ANC25LA028](https://openairdocs.org/ntsb/ANC25LA028), Mar 27, 2025: Piper PA-28-140 (N261FC), Royal Kunia, HI, substantial damage. Probable cause: Improper alteration of the crankshaft propeller flange at an unknown time, which resulted in an in-flight separation of the propeller assembly. - [NTSB ERA25LA122](https://openairdocs.org/ntsb/ERA25LA122), Feb 10, 2025: Allyn Kaste Rans S-19 (KIT) (N258DK), Doylestown, PA, substantial damage. Probable cause: The pilot’s inadequate maintenance and preflight inspection. - [NTSB ANC24LA077](https://openairdocs.org/ntsb/ANC24LA077), Aug 19, 2024: Robinson R44 (N740RH), Honolulu, HI, substantial damage. Probable cause: A failure of the flex plate yoke flange assembly due to incorrectly torqued bolts. Contributing was the maintenance personnel’s inadequate inspection of the tail rotor flex plate assembly. - [NTSB DCA24LA293](https://openairdocs.org/ntsb/DCA24LA293), Aug 17, 2024: Boeing 747-4HQF (N782CK), Istanbul, Türkiye, substantial damage. Probable cause: The fatigue failure of multiple hinge ribs associated with the right outboard aileron, which resulted in abnormal aileron movement and airframe vibration. Contributing to the failure was the… - [NTSB WPR24LA275](https://openairdocs.org/ntsb/WPR24LA275), Aug 9, 2024: Piper PA-30 (N8458Y), Concord, CA, substantial damage. Probable cause: The failure of the main landing gear to extend and lock for reasons that could not be determined based on the available information. Contributing to the accident was a mechanical failure of the… - [NTSB WPR24LA268](https://openairdocs.org/ntsb/WPR24LA268), Aug 5, 2024: Piper PA-34-220T (N4145B), Minden, NV, substantial damage. Probable cause: The pilot’s improper preflight inspection of the stabilator trim position, which resulted in a porpoised landing. Contributing to the accident was the maintenance personnel’s improper maintenance of… - [NTSB ERA24LA330](https://openairdocs.org/ntsb/ERA24LA330), Jul 29, 2024: Raytheon A36 (N934PC), Naples, FL, substantial damage. Probable cause: Contamination of the airplane’s fuel system with debris, which resulted in restricted fuel flow through multiple fuel injectors and the subsequent partial loss of engine power. - [NTSB CEN24LA286](https://openairdocs.org/ntsb/CEN24LA286), Jul 28, 2024: Piper PA46 (N4646G), Radisson, WI, substantial damage. Probable cause: The non-certificated mechanic’s failure to properly tighten and torque the fuel system pressure test port cap, which resulted in a total loss of engine power, and a subsequent forced landing. 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.