# Nav system malfunction/failure

- Type: NTSB defining event
- NTSB code: 335
- CICTT category: System/Component Failure (Non-Powerplant)
- Defining event in: 7 cases
- In the sequence of: 8 cases
- Fatal cases: 0
- All cases: https://openairdocs.org/ntsb-events/335/cases.md
- Cases with it anywhere in the sequence: https://openairdocs.org/ntsb-events/335/sequence.md
- Page: https://openairdocs.org/ntsb-events/335

## Cases per year (defining / in the sequence)

- 2013: 1 / 1
- 2014: 1 / 1
- 2015: 0 / 1
- 2017: 1 / 1
- 2018: 1 / 1
- 2019: 1 / 1
- 2025: 2 / 2

## Phase of flight

- Enroute-cruise: 2 cases
- Enroute: 2 cases
- Approach: 1 cases
- Enroute-descent: 1 cases
- Initial climb: 1 cases

## In the probable cause of these cases

- [Maximum crosswind component](https://openairdocs.org/ntsb-findings/01061015) (Aircraft): 1 cases
- [Global positioning sys (GPS)](https://openairdocs.org/ntsb-findings/01023457) (Aircraft): 1 cases

## Aircraft models (registry)

- [Cessna P210N](https://openairdocs.org/model/cessna-p210n): 1 cases
- [Boeing BOEING CV2](https://openairdocs.org/model/boeing-boeing-cv2): 1 cases

## Newest cases

- [NTSB DCA26WA069](https://openairdocs.org/ntsb/DCA26WA069), Nov 18, 2025: Saab 340 (Not provided), Garbutt, Australia, occurrence, no damage
- [NTSB DCA25WA348](https://openairdocs.org/ntsb/DCA25WA348), May 22, 2025: Airbus A320 (AP-BLB), Karachi, Pakistan, incident, no damage
- [NTSB DCA19CA170](https://openairdocs.org/ntsb/DCA19CA170), Jun 21, 2019: Boeing CV2 (N243XT), Beeville, TX, substantial damage. Probable cause: A higher than expected and accounted for crosswind which initiated a lateral deviation, and resulted in the aircraft reaching the limits of the geo-fence area triggering a contingency forced landing.
- [NTSB DCA18WA151](https://openairdocs.org/ntsb/DCA18WA151), Apr 12, 2018: Boeing 737 (XA-UZW), Mexico City, Mexico, incident, no damage
- [NTSB CEN17WA195](https://openairdocs.org/ntsb/CEN17WA195), May 9, 2017: Cessna P210N (N116DC), San Vicente Tancoayalab, Mexico, destroyed
- [NTSB ENG15WA019](https://openairdocs.org/ntsb/ENG15WA019), Dec 26, 2014: Airbus A330 - 201 (F-GRSQ), Athens, Greece, Greece, incident, no damage
- [NTSB DCA13WA103](https://openairdocs.org/ntsb/DCA13WA103), May 31, 2013: Boeing 737-800 (EI-ENL), Eindhoven, Netherlands, incident, no damage

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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