# Prop/spinner section

- Type: NTSB finding subsection
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft propeller/rotor](https://openairdocs.org/ntsb-findings/0104) › [Propeller system](https://openairdocs.org/ntsb-findings/010461) › Prop/spinner section
- NTSB code: 01046113
- Cases: 5
- In the probable cause: 5
- Fatal cases: 2
- All cases: https://openairdocs.org/ntsb-findings/01046113/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01046113/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01046113

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

- 2009: 1 / 1
- 2014: 1 / 1
- 2018: 1 / 1
- 2019: 1 / 1
- 2024: 1 / 1

## Defining events in these cases

- [Birdstrike](https://openairdocs.org/ntsb-events/901): 1 cases
- [Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340): 1 cases
- [Part(s) separation from AC](https://openairdocs.org/ntsb-events/338): 1 cases
- [Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330): 1 cases
- [Abrupt maneuver](https://openairdocs.org/ntsb-events/270): 1 cases

## Aircraft models (registry)

- [Raytheon 400A](https://openairdocs.org/model/raytheon-400a): 1 cases
- [Mooney M20E](https://openairdocs.org/model/mooney-m20e): 1 cases
- [Davis Barry E PIETENPOL BIG PIET](https://openairdocs.org/model/davis-barry-e-pietenpol-big-piet): 1 cases
- [Klaas Development LANCAIR IV-P](https://openairdocs.org/model/klaas-development-lancair-iv-p): 1 cases

## Other findings in the same cases

- [Equip certification/testing](https://openairdocs.org/ntsb-findings/04012015) (Organizational issues): 1 cases
- [Animal(s)/bird(s)](https://openairdocs.org/ntsb-findings/03022045) (Environmental issues): 1 cases
- [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 1 cases
- [Installation](https://openairdocs.org/ntsb-findings/02062035) (Personnel issues): 1 cases
- [Scheduled/routine maintenance](https://openairdocs.org/ntsb-findings/02062010) (Personnel issues): 1 cases
- [Scheduled/routine inspection](https://openairdocs.org/ntsb-findings/02061520) (Personnel issues): 1 cases
- [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 1 cases
- [Surface speed/braking](https://openairdocs.org/ntsb-findings/01062045) (Aircraft): 1 cases
- [Performance/control parameters, general](https://openairdocs.org/ntsb-findings/01062000) (Aircraft): 1 cases
- [Aircraft structures, general](https://openairdocs.org/ntsb-findings/01030000) (Aircraft): 1 cases

## Newest cases

- [NTSB CEN25LA007](https://openairdocs.org/ntsb/CEN25LA007), Oct 8, 2024: Mooney M20E (N9151V), Richmond, TX, substantial damage. Probable cause: The partial separation of a portion of the propeller spinner and its mounting bulkhead along with the upper cowl fairing while in a full-power climb.
- [NTSB ERA19LA228](https://openairdocs.org/ntsb/ERA19LA228), Jul 16, 2019: Pietenpol BIG Piet (N973BP), Gainesboro, TN, substantial damage. Probable cause: Separation of the spinner cap for reasons that could not be determined based on available evidence, which resulted in contact and subsequent separation of the wooden propeller blade tip.
- [NTSB WPR18FA171](https://openairdocs.org/ntsb/WPR18FA171), Jun 15, 2018: Beech A35 (N580B), Hesperia, CA, destroyed, 2 fatal. Probable cause: The pilot's failure to maintain airplane control during an attempted return to the airport following the separation of the spinner bulkhead during takeoff as a result of fatigue cracking.…
- [NTSB ERA14FA421](https://openairdocs.org/ntsb/ERA14FA421), Sep 3, 2014: Klaas Development Lancair IV P (N541EM), Ooltewah, TN, substantial damage, 1 fatal. Probable cause: The inadequate torque of the propeller mounting bolts and inspection of the propeller, which resulted in the fatigue fracture of the bolts and a subsequent in-flight separation of the propeller…
- [NTSB CEN09IA481](https://openairdocs.org/ntsb/CEN09IA481), Jul 31, 2009: Raytheon BE-400A (N679SJ), Sugar Land, TX, incident, minor damage. Probable cause: The failure of the spinner following an unavoidable bird strike. Contributing to the incident were the inadequate engine bird strike certification requirements in place at the time the engine was…

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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