# Main frame (on nacelles/pylon)

- Type: NTSB finding subsection
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft structures](https://openairdocs.org/ntsb-findings/0103) › [Nacelles/pylons structure](https://openairdocs.org/ntsb-findings/010354) › Main frame (on nacelles/pylon)
- NTSB code: 01035410
- Cases: 2
- In the probable cause: 2
- Fatal cases: 1
- All cases: https://openairdocs.org/ntsb-findings/01035410/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01035410/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01035410

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

- 2010: 1 / 1
- 2019: 1 / 1

## Defining events in these 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

## Aircraft models (registry)

- [Hughes Helicopters HUGHES 369D](https://openairdocs.org/model/hughes-helicopters-hughes-369d): 1 cases
- [Airbus Industrie A320-232](https://openairdocs.org/model/airbus-industrie-a320-232): 1 cases

## Other findings in the same cases

- [Altitude](https://openairdocs.org/ntsb-findings/01062012) (Aircraft): 1 cases
- [Engine/transmission coupling](https://openairdocs.org/ntsb-findings/01046310) (Aircraft): 1 cases
- [Nacelles/pylons structure, general](https://openairdocs.org/ntsb-findings/01035400) (Aircraft): 1 cases

## Newest cases

- [NTSB ERA19FA118](https://openairdocs.org/ntsb/ERA19FA118), Mar 5, 2019: Hughes 369 (N89ZC), Talking Rock, GA, substantial damage, 1 fatal. Probable cause: A fatigue failure of the overrunning clutch subassembly due to abnormal bending loads due to cracks on the center engine mount, which resulted in an inflight loss of power. Contributing to the…
- [NTSB ENG10IA026](https://openairdocs.org/ntsb/ENG10IA026), Apr 5, 2010: Airbus A320 (N535JB), Newark, NJ, incident, minor damage. Probable cause: The separation of both halves of the left engine fan cowl assembly due to improper latching and locking of the all the fan cowl latches. The cause of the improper latching and locking of the fan…

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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