# Engine cowling system

- Type: NTSB finding subsection
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft power plant](https://openairdocs.org/ntsb-findings/0105) › [Power plant](https://openairdocs.org/ntsb-findings/010571) › Engine cowling system
- NTSB code: 01057110
- Cases: 11
- In the probable cause: 8
- Fatal cases: 0
- All cases: https://openairdocs.org/ntsb-findings/01057110/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01057110/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01057110

## Cases per year (in the probable cause / all)

- 2008: 1 / 1
- 2009: 2 / 2
- 2011: 0 / 2
- 2012: 1 / 1
- 2017: 1 / 1
- 2019: 2 / 2
- 2020: 1 / 1
- 2021: 0 / 1

## Defining events in these cases

- [Part(s) separation from AC](https://openairdocs.org/ntsb-events/338): 4 cases
- [Birdstrike](https://openairdocs.org/ntsb-events/901): 1 cases
- [Miscellaneous/other](https://openairdocs.org/ntsb-events/900): 1 cases
- [Uncontained engine failure](https://openairdocs.org/ntsb-events/343): 1 cases
- [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 1 cases
- [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 1 cases
- [Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340): 1 cases
- [Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330): 1 cases

## Aircraft models (registry)

- [S.O.C.A.T.A. MS894A](https://openairdocs.org/model/s-o-c-a-t-a-ms894a): 1 cases
- [Eurocopter Deutschland MBB-BK 117 C-2](https://openairdocs.org/model/eurocopter-deutschland-mbb-bk-117-c-2): 1 cases
- [Airbus A319-114](https://openairdocs.org/model/airbus-a319-114): 1 cases
- [Boeing 757-222](https://openairdocs.org/model/boeing-757-222): 1 cases
- [Boeing 747-451](https://openairdocs.org/model/boeing-747-451): 1 cases
- [Bell 222](https://openairdocs.org/model/bell-222): 1 cases
- [Soto William J CH701](https://openairdocs.org/model/soto-william-j-ch701): 1 cases
- [Bellet James J VANS RV-8](https://openairdocs.org/model/bellet-james-j-vans-rv-8): 1 cases
- [Johnson Paul B AVID MARK IV](https://openairdocs.org/model/johnson-paul-b-avid-mark-iv): 1 cases

## Other findings in the same cases

- [Scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010) (Personnel issues): 2 cases
- [Preflight inspection](https://openairdocs.org/ntsb-findings/02061510) (Personnel issues): 2 cases
- [Not determined, general](https://openairdocs.org/ntsb-findings/05000000) (Not determined): 1 cases
- [Animal(s)/bird(s)](https://openairdocs.org/ntsb-findings/03022045) (Environmental issues): 1 cases
- [Rough terrain](https://openairdocs.org/ntsb-findings/03021015) (Environmental issues): 1 cases
- [Fabrication](https://openairdocs.org/ntsb-findings/02062025) (Personnel issues): 1 cases
- [Scheduled/routine inspection](https://openairdocs.org/ntsb-findings/02061520) (Personnel issues): 1 cases
- [Forgotten action/omission](https://openairdocs.org/ntsb-findings/02041035) (Personnel issues): 1 cases
- [Lack of action](https://openairdocs.org/ntsb-findings/02041030) (Personnel issues): 1 cases
- [Attention](https://openairdocs.org/ntsb-findings/02021510) (Personnel issues): 1 cases

## Newest cases

- [NTSB ERA21LA155](https://openairdocs.org/ntsb/ERA21LA155), Mar 15, 2021: Socata MS894A (N42BF), Monroe, GA, substantial damage. Probable cause: Maintenance personnel’s failure to properly inspect and maintain the airplane’s engine cowling latches, which resulted in the in-flight separation of the engine cowling and a subsequent forced…
- [NTSB CEN20LA082](https://openairdocs.org/ntsb/CEN20LA082), Feb 12, 2020: Cessna 560 (N654CE), Aledo, TX, substantial damage. Probable cause: The in-flight separation of the upper and lower right engine cowlings for reasons that could not be determined based on available evidence.
- [NTSB CEN20LA041](https://openairdocs.org/ntsb/CEN20LA041), Dec 18, 2019: Cessna 525A (CGOJG), Scotts Bluff, NE, substantial damage. Probable cause: The installation of incorrect mounting hardware to secure the right engine cowl, which resulted in an in-flight separation and impact with the horizontal stabilizer and elevator.
- [NTSB WPR20LA035](https://openairdocs.org/ntsb/WPR20LA035), Nov 29, 2019: Zenith Stol CH701 (N701WJ), Byron, CA, substantial damage. Probable cause: The pilot/builder's improper construction of the cowling, which resulted in inadequate venting of the engine, its overheating, and a partial loss of engine power.
- [NTSB GAA17CA557](https://openairdocs.org/ntsb/GAA17CA557), Sep 26, 2017: Bellet James J Vans RV 8 (N184SJ), Orange, MA, substantial damage. Probable cause: The pilot's failure to remove the engine cowl plugs during preflight, which resulted in excessive engine cylinder head temperatures during climb and a total loss of engine power.
- [NTSB CEN12CA474](https://openairdocs.org/ntsb/CEN12CA474), Jul 24, 2012: Eurocopter Deutschland MBB-BK 117 C-2 (N455MH), Houston, TX, substantial damage. Probable cause: The pilot’s inadequate preflight inspection, which failed to detect the unsecured cowling latches and resulted in the in-flight opening of an engine cowling.
- [NTSB ENG12IA003](https://openairdocs.org/ntsb/ENG12IA003), Oct 23, 2011: Boeing 747-451 (N661US), Detroit, MI, incident, minor damage. Probable cause: The penetration of turbine blade fragments through the rear turbine case, which punctured the No. 4 bearing oil pressure supply tube, allowing misted oil to contact the hot engine case and ignite the…
- [NTSB ENG11IA051](https://openairdocs.org/ntsb/ENG11IA051), Sep 26, 2011: Boeing 757-222 (N526UA), Denver, CO, incident, minor damage. Probable cause: **This probable cause was modified on 4/5/2012. Please see the public docket for this accident to view the original probable cause.** The initial damage to the fan blades was caused by the ingestion…
- [NTSB WPR09CA415](https://openairdocs.org/ntsb/WPR09CA415), Aug 21, 2009: Paul B. Johnson Avid Mark IV (N333PD), Nampa, ID, substantial damage. Probable cause: The airplane's encounter with tall vegetation that ensnared the landing gear during an off-field precautionary landing.
- [NTSB CEN09CA218](https://openairdocs.org/ntsb/CEN09CA218), Mar 13, 2009: Bell 222 (N222LL), Milliken, CO, substantial damage. Probable cause: The separation of the left engine cowling for undetermined reasons.

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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