# Interphone

- Type: NTSB finding subsection
- Path: [Aircraft](https://openairdocs.org/ntsb-findings/01) › [Aircraft systems](https://openairdocs.org/ntsb-findings/0102) › [Communications system](https://openairdocs.org/ntsb-findings/010223) › Interphone
- NTSB code: 01022340
- Cases: 4
- In the probable cause: 2
- Fatal cases: 0
- All cases: https://openairdocs.org/ntsb-findings/01022340/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/01022340/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/01022340

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

- 2011: 0 / 1
- 2013: 1 / 1
- 2017: 1 / 1
- 2021: 0 / 1

## Defining events in these cases

- [Turbulence encounter](https://openairdocs.org/ntsb-events/360): 1 cases
- [Comm system malf/failure](https://openairdocs.org/ntsb-events/336): 1 cases
- [Landing gear not configured](https://openairdocs.org/ntsb-events/095): 1 cases
- [Hard landing](https://openairdocs.org/ntsb-events/092): 1 cases

## Aircraft models (registry)

- [Embraer S A ERJ 170-200 LR](https://openairdocs.org/model/embraer-s-a-erj-170-200-lr): 1 cases
- [Boeing 747-422](https://openairdocs.org/model/boeing-747-422): 1 cases
- [Beech G35](https://openairdocs.org/model/beech-g35): 1 cases
- [Czech Aircraft Works Spol Sro SPORTCRUISER](https://openairdocs.org/model/czech-aircraft-works-spol-sro-sportcruiser): 1 cases

## Other findings in the same cases

- [Access to equipment/controls](https://openairdocs.org/ntsb-findings/03041015) (Environmental issues): 1 cases
- [Clear air turbulence](https://openairdocs.org/ntsb-findings/03032015) (Environmental issues): 1 cases
- [Interpretation/understanding](https://openairdocs.org/ntsb-findings/02063530) (Personnel issues): 1 cases
- [Language/accent](https://openairdocs.org/ntsb-findings/02063525) (Personnel issues): 1 cases
- [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 1 cases
- [Lack of action](https://openairdocs.org/ntsb-findings/02041030) (Personnel issues): 1 cases
- [Gear position and warning](https://openairdocs.org/ntsb-findings/01023260) (Aircraft): 1 cases
- [Landing gear system, general](https://openairdocs.org/ntsb-findings/01023200) (Aircraft): 1 cases

## Newest cases

- [NTSB DCA22LA015](https://openairdocs.org/ntsb/DCA22LA015), Oct 23, 2021: Embraer S A ERJ 170-200 LR (N252NN), Miami, FL, no damage. Probable cause: An abrupt jerk of the airplane as the captain applied the parking brake during the tow that caused a flight attendant to fall and break her wrist.
- [NTSB GAA17CA465](https://openairdocs.org/ntsb/GAA17CA465), Aug 4, 2017: Czech Aircraft Works Spol Sro Sportcruiser (N777NG), Salisbury, NC, substantial damage. Probable cause: The physical interference of the student pilot’s headset control unit with the canopy, which prevented the canopy latches from seating properly and resulted in the canopy opening in flight and the…
- [NTSB WPR13LA131](https://openairdocs.org/ntsb/WPR13LA131), Feb 19, 2013: Boeing 747-422 (N174UA), Pacific Ocean, A1, no damage. Probable cause: The flight’s encounter with moderate clear air turbulence while en route, which resulted in a serious injury to a flight attendant. Contributing to the accident was the lack of communication…
- [NTSB CEN11CA212](https://openairdocs.org/ntsb/CEN11CA212), Feb 27, 2011: Beech G35 (N437D), Brenham, TX, substantial damage. Probable cause: The pilot’s failure to extend the landing gear during the approach resulting in a gear-up 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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