# Frames (main fuselage)

- Type: NTSB finding subsection
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft structures](https://openairdocs.org/ntsb-findings/0103) › [Fuselage](https://openairdocs.org/ntsb-findings/010353) › Frames (main fuselage)
- NTSB code: 01035311
- Cases: 8
- In the probable cause: 4
- Fatal cases: 2
- All cases: https://openairdocs.org/ntsb-findings/01035311/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01035311/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01035311

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

- 2010: 0 / 2
- 2011: 0 / 1
- 2013: 1 / 2
- 2017: 1 / 1
- 2019: 1 / 1
- 2022: 1 / 1

## Defining events in these cases

- [Hard landing](https://openairdocs.org/ntsb-events/092): 3 cases
- [Part(s) separation from AC](https://openairdocs.org/ntsb-events/338): 1 cases
- [Aircraft structural failure](https://openairdocs.org/ntsb-events/337): 1 cases
- [Flight control sys malf/fail](https://openairdocs.org/ntsb-events/333): 1 cases
- [Abrupt maneuver](https://openairdocs.org/ntsb-events/270): 1 cases
- [Ground collision](https://openairdocs.org/ntsb-events/200): 1 cases

## Aircraft models (registry)

- [Piper PA-12](https://openairdocs.org/model/piper-pa-12): 2 cases
- [Aeronca 7DC](https://openairdocs.org/model/aeronca-7dc): 1 cases
- [Cessna 172S](https://openairdocs.org/model/cessna-172s): 1 cases
- [Bell 47G-5](https://openairdocs.org/model/bell-47g-5): 1 cases

## Other findings in the same cases

- [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 2 cases
- [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 2 cases
- [Runway/land/takeoff/taxi surface, general](https://openairdocs.org/ntsb-findings/03023000) (Environmental issues): 1 cases
- [Water/moisture](https://openairdocs.org/ntsb-findings/03022057) (Environmental issues): 1 cases
- [Debris/dirt/foreign object](https://openairdocs.org/ntsb-findings/03022055) (Environmental issues): 1 cases
- [Rough terrain](https://openairdocs.org/ntsb-findings/03021015) (Environmental issues): 1 cases
- [Installation](https://openairdocs.org/ntsb-findings/02062035) (Personnel issues): 1 cases
- [Fabrication](https://openairdocs.org/ntsb-findings/02062025) (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

## Newest cases

- [NTSB WPR22FA169](https://openairdocs.org/ntsb/WPR22FA169), Apr 30, 2022: Bearhawk LSA (N1908A), Kalispell, MT, substantial damage, 2 fatal. Probable cause: An excessive pitch control input for undetermined reasons while the airplane was operating above maneuvering speed, which led to a structural failure of the right wing during cruise flight.…
- [NTSB ANC19LA024](https://openairdocs.org/ntsb/ANC19LA024), Jun 12, 2019: Aeronca 7DC (N83391), Nome Creek, AK, substantial damage. Probable cause: The failure of the airplane's structural tubing due to corrosion, which resulted in a tailwheel separation and a subsequent loss of control. Also causal was the mechanic's failure to perform a…
- [NTSB WPR17FA074](https://openairdocs.org/ntsb/WPR17FA074), Mar 7, 2017: Quicksilver MXL II (UNREG), Hesperia, CA, substantial damage, 1 fatal. Probable cause: The pilot's failure to identify and correct his construction error of a critical structural component, which resulted in a loss of airplane control during takeoff. Contributing to the accident was…
- [NTSB WPR13LA404](https://openairdocs.org/ntsb/WPR13LA404), Sep 11, 2013: Bell 47G5 (N7836S), King City, CA, substantial damage. Probable cause: The failure of the helicopter’s center frame tube due to a fatigue crack and corrosion originating from a welded surface. Contributing to the accident was maintenance personnel’s inadequate…
- [NTSB ERA13IA114](https://openairdocs.org/ntsb/ERA13IA114), Jan 13, 2013: Cessna 560XL (N662QS), Debary, FL, incident, no damage. Probable cause: An accumulation of debris in the airplane’s bilge drain holes that prevented accumulated moisture from properly draining; the accumulated moisture subsequently froze around the elevator control…
- [NTSB ANC11CA063](https://openairdocs.org/ntsb/ANC11CA063), Jul 10, 2011: Piper PA-12 (N2318M), Gulkana, AK, substantial damage. Probable cause: The pilot's inadequate recovery from a bounced landing.
- [NTSB WPR10CA475](https://openairdocs.org/ntsb/WPR10CA475), Jul 25, 2010: Cessna 172S (N172CY), Santa Maria, CA, substantial damage. Probable cause: The pilot's inadequate flare which resulted in a bounce and hard landing.
- [NTSB ANC10LA012](https://openairdocs.org/ntsb/ANC10LA012), Jan 14, 2010: Piper PA-12 (N3233M), Gulkana, AK, substantial damage. Probable cause: The pilot's selection of unsuitable terrain for landing, which resulted in structural damage to the airplane during 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.

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