# Elevator/tab attach fitting

- Type: NTSB finding subsection
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft structures](https://openairdocs.org/ntsb-findings/0103) › [Empennage structure](https://openairdocs.org/ntsb-findings/010355) › Elevator/tab attach fitting
- NTSB code: 01035552
- Cases: 3
- In the probable cause: 3
- Fatal cases: 2
- All cases: https://openairdocs.org/ntsb-findings/01035552/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01035552/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01035552

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

- 2008: 1 / 1
- 2009: 1 / 1
- 2011: 1 / 1

## Defining events in these cases

- [Flight control sys malf/fail](https://openairdocs.org/ntsb-events/333): 2 cases
- [Aircraft structural failure](https://openairdocs.org/ntsb-events/337): 1 cases

## Aircraft models (registry)

- [Aerospatiale ATR 72-212A](https://openairdocs.org/model/aerospatiale-atr-72-212a): 1 cases
- [North American/Aero Classics P-51D](https://openairdocs.org/model/north-american-aero-classics-p-51d): 1 cases
- [Convair 340/580](https://openairdocs.org/model/convair-340-580): 1 cases

## Other findings in the same cases

- [Documentation/record keeping, general](https://openairdocs.org/ntsb-findings/04033000) (Organizational issues): 1 cases
- [Airport facilities/design, general](https://openairdocs.org/ntsb-findings/03017000) (Environmental issues): 1 cases
- [Maintenance, general](https://openairdocs.org/ntsb-findings/02062000) (Personnel issues): 1 cases
- [Post maintenance inspection](https://openairdocs.org/ntsb-findings/02061515) (Personnel issues): 1 cases
- [Lack of action](https://openairdocs.org/ntsb-findings/02041030) (Personnel issues): 1 cases
- [Incorrect action selection](https://openairdocs.org/ntsb-findings/02041010) (Personnel issues): 1 cases
- [Action, general](https://openairdocs.org/ntsb-findings/02041000) (Personnel issues): 1 cases
- [Performance/control parameters, general](https://openairdocs.org/ntsb-findings/01062000) (Aircraft): 1 cases
- [Tab structure (on elevator)](https://openairdocs.org/ntsb-findings/01035523) (Aircraft): 1 cases
- [Elevators](https://openairdocs.org/ntsb-findings/01035520) (Aircraft): 1 cases

## Newest cases

- [NTSB WPR11MA454](https://openairdocs.org/ntsb/WPR11MA454), Sep 16, 2011: North American/Aero Classics P-51D (N79111), Reno, NV, substantial damage, 11 fatal. Probable cause: The reduced stiffness of the elevator trim tab system that allowed aerodynamic flutter to occur at racing speeds. The reduced stiffness was a result of deteriorated locknut inserts that allowed the…
- [NTSB CEN10IA084](https://openairdocs.org/ntsb/CEN10IA084), Dec 26, 2009: ATR ATR72 (N494AE), Dallas, TX, incident, minor damage. Probable cause: A fatigue failure of an elevator stop bracket, which resulted in a partial jam of the elevator control. Contributing to the failure was the improper installation of shim stacks, poor alignment of the…
- [NTSB CHI08MA270](https://openairdocs.org/ntsb/CHI08MA270), Sep 1, 2008: Convair CV-580 (N587X), Columbus, OH, destroyed, 3 fatal. Probable cause: The improper (reverse) rigging of the elevator trim cables by company maintenance personnel, and their subsequent failure to discover the misrigging during required post-maintenance checks.…

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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