# Temp/humidity/pressure

- Type: NTSB finding section
- Path: [Environmental issues](https://openairdocs.org/ntsb-findings/03) › [Conditions/weather/phenomena](https://openairdocs.org/ntsb-findings/0303) › Temp/humidity/pressure
- NTSB code: 030310
- Cases: 909
- In the probable cause: 664
- Fatal cases: 161
- All cases: https://openairdocs.org/ntsb-findings/030310/cases.md
- Cases with it in the probable cause: https://openairdocs.org/ntsb-findings/030310/cases.md?cause=1
- Page: https://openairdocs.org/ntsb-findings/030310

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

- 2008: 54 / 60
- 2009: 31 / 50
- 2010: 38 / 59
- 2011: 30 / 63
- 2012: 49 / 71
- 2013: 39 / 53
- 2014: 34 / 53
- 2015: 37 / 58
- 2016: 33 / 53
- 2017: 30 / 47
- 2018: 52 / 59
- 2019: 32 / 37
- 2020: 43 / 44
- 2021: 36 / 49
- 2022: 30 / 39
- 2023: 32 / 38
- 2024: 41 / 46
- 2025: 18 / 23
- 2026: 5 / 7

## Findings

- [Conducive to carburetor icing](https://openairdocs.org/ntsb-findings/03031030): 435 cases, 357 in the probable cause
- [High density altitude](https://openairdocs.org/ntsb-findings/03031020): 280 cases, 164 in the probable cause
- [Conducive to structural icing](https://openairdocs.org/ntsb-findings/03031025): 103 cases, 78 in the probable cause
- [Thermal lifting](https://openairdocs.org/ntsb-findings/03031040): 53 cases, 47 in the probable cause
- [High temperature](https://openairdocs.org/ntsb-findings/03031015): 30 cases, 14 in the probable cause
- [Low temperature](https://openairdocs.org/ntsb-findings/03031010): 8 cases, 5 in the probable cause
- [Temp/humidity/pressure, general](https://openairdocs.org/ntsb-findings/03031000): 7 cases, 3 in the probable cause
- [Temperature inversion](https://openairdocs.org/ntsb-findings/03031035): 1 cases, 0 in the probable cause

## Defining events in these cases

- [Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342): 137 cases
- [Fuel related](https://openairdocs.org/ntsb-events/190): 136 cases
- [Loss of engine power (total)](https://openairdocs.org/ntsb-events/341): 129 cases
- [Loss of control in flight](https://openairdocs.org/ntsb-events/240): 114 cases
- [Loss of lift](https://openairdocs.org/ntsb-events/500): 67 cases
- [Collision during takeoff/land](https://openairdocs.org/ntsb-events/490): 53 cases
- [Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241): 44 cases
- [Structural icing](https://openairdocs.org/ntsb-events/210): 32 cases
- [Low altitude operation/event](https://openairdocs.org/ntsb-events/220): 23 cases
- [Controlled flight into terr/obj (CFIT)](https://openairdocs.org/ntsb-events/120): 21 cases

## Aircraft models (registry)

- [Piper PA-28-140](https://openairdocs.org/model/piper-pa-28-140): 22 cases
- [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150): 18 cases
- [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta): 17 cases
- [Robinson Helicopter R44 II](https://openairdocs.org/model/robinson-helicopter-r44-ii): 12 cases
- [Cessna 172N](https://openairdocs.org/model/cessna-172n): 12 cases
- [Cessna 150M](https://openairdocs.org/model/cessna-150m): 11 cases
- [Cessna 182A](https://openairdocs.org/model/cessna-182a): 9 cases
- [Cessna 172M](https://openairdocs.org/model/cessna-172m): 9 cases
- [Cessna 152](https://openairdocs.org/model/cessna-152): 9 cases
- [Piper PA-28-180](https://openairdocs.org/model/piper-pa-28-180): 8 cases

## Other findings in the same cases

- [Aircraft control](https://openairdocs.org/ntsb-findings/02063040) (Personnel issues): 215 cases
- [Decision making/judgment](https://openairdocs.org/ntsb-findings/02041520) (Personnel issues): 195 cases
- [Use of equip/system](https://openairdocs.org/ntsb-findings/02063015) (Personnel issues): 117 cases
- [Airspeed](https://openairdocs.org/ntsb-findings/01062010) (Aircraft): 111 cases
- [Intake anti-ice, deice](https://openairdocs.org/ntsb-findings/01023020) (Aircraft): 102 cases
- [Lack of action](https://openairdocs.org/ntsb-findings/02041030) (Personnel issues): 100 cases
- [Altitude](https://openairdocs.org/ntsb-findings/01062012) (Aircraft): 71 cases
- [Delayed action](https://openairdocs.org/ntsb-findings/02041025) (Personnel issues): 63 cases
- [Tree(s)](https://openairdocs.org/ntsb-findings/03022020) (Environmental issues): 56 cases
- [Climb rate](https://openairdocs.org/ntsb-findings/01062035) (Aircraft): 55 cases

## Newest cases

- [NTSB ERA26LA311](https://openairdocs.org/ntsb/ERA26LA311), Aug 21, 2026: HPH Glasflugel 304CZ (N304BS), Xenia, OH, substantial damage. Probable cause: The glider’s encounter with atmospheric conditions where lift was not sufficient to maintain flight.
- [NTSB WPR26LA267](https://openairdocs.org/ntsb/WPR26LA267), Jul 18, 2026: Rans S7 (N6133M), Kemmerer, WY, substantial damage. Probable cause: The pilot’s decision to perform a take-off in high-density-altitude, gusting-crosswind conditions, which resulted in an aerodynamic stall, hard landing and subsequent nose-over.
- [NTSB WPR26LA266](https://openairdocs.org/ntsb/WPR26LA266), Jul 18, 2026: Maule M-4-180V (N489LA), Creede, CO, substantial damage. Probable cause: The pilot’s exceedance of the airplane’s performance capabilities in mountainous terrain, which resulted in a forced landing.
- [NTSB DCA26LA285](https://openairdocs.org/ntsb/DCA26LA285), Jun 26, 2026: Leigh Aerosystems E100 (N1224E), Douglas, AZ, substantial damage. Probable cause: Degraded engine and propeller performance during hot and high-density altitude operations, which resulted in a high descent rate and subsequent hard landing.
- [NTSB CEN26LA211](https://openairdocs.org/ntsb/CEN26LA211), Jun 1, 2026: Piper PA-28-235 (N15291), Montevideo, MN, substantial damage. Probable cause: A total loss of engine power on approach due to carburetor icing.
- [NTSB ERA26LA199](https://openairdocs.org/ntsb/ERA26LA199), Apr 20, 2026: Alexander Schleicher ASW 27-18 (N27CU), Greenwood, SC, substantial damage. Probable cause: The glider pilot’s encounter with a strong sink/loss of lift, which resulted in a forced landing to unsuitable terrain.
- [NTSB WPR26LA126](https://openairdocs.org/ntsb/WPR26LA126), Mar 10, 2026: Cirrus Design SR20 (N619AV), Redington, AZ, substantial damage. Probable cause: The pilot’s improper decision to continue the flight into icing conditions, which resulted in the accumulation of airframe icing and a subsequent aerodynamic stall.
- [NTSB ERA26LA079](https://openairdocs.org/ntsb/ERA26LA079), Dec 27, 2025: Cessna 140 (N89884), Ceres, VA, substantial damage. Probable cause: The pilot’s failure to recognize and mitigate carburetor icing, which resulted in a partial loss of engine power and forced landing.
- [NTSB WPR26LA010](https://openairdocs.org/ntsb/WPR26LA010), Oct 5, 2025: Glasflugel STD Libelle 201B (N1095G), Moriarty, NM, substantial damage. Probable cause: The glider’s encounter with atmospheric conditions where lift was not sufficient to maintain flight.
- [NTSB ANC25LA112](https://openairdocs.org/ntsb/ANC25LA112), Sep 22, 2025: Cessna 172 (N4282F), Yakataga, AK, substantial damage. Probable cause: The total loss of engine power due to carburetor icing and the pilot’s failure to effectively use carburetor heat in meteorological conditions conducive to the formation of carburetor icing.

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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