# NTSB investigations: Structural icing

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

Page 2 of 3 · 102 cases

## Cases, newest first

- [NTSB CEN15LA091](https://openairdocs.org/ntsb/CEN15LA091.md): Cessna 208B · Roswell, NM · Accident · No injuries · Limited investigation · Final report · Dec 30, 2014 · N950FE · Substantial damage
  > The pilot's failure to maintain adequate airspeed to compensate for icing on the airplane's wings and control surfaces during a circling approach, which resulted in an aerodynamic stall and impact with terrain.
- [NTSB DCA15MA029](https://openairdocs.org/ntsb/DCA15MA029.md): Embraer EMB-500 · Gaithersburg, MD · Accident · 6 fatal · Class 1 · Major · Final report · Dec 8, 2014 · N100EQ · Destroyed
  > the pilot's conduct of an approach in structural icing conditions without turning on the airplane's wing and horizontal stabilizer deice system, leading to ice accumulation on those surfaces, and without using the appropriate landing performance speeds for…
- [NTSB CEN15LA021](https://openairdocs.org/ntsb/CEN15LA021.md): Raytheon 58 · Dixon, IL · Accident · No injuries · Limited investigation · Final report · Oct 4, 2014 · N345PG · Substantial damage
  > The pilots’ improper decision to continue flight in icing conditions after the deicing boots could not shed accumulated ice, which resulted in a temporary loss of airplane control.
- [NTSB CEN14IA139](https://openairdocs.org/ntsb/CEN14IA139.md): Cirrus Design SR22 · Gunnison, CO · Incident · No injuries · Incident investigation · Final report · Feb 14, 2014 · N18DN · Minor damage
  > The pilot's improper decision to initiate the flight into an area with forecast icing conditions, which resulted in an encounter with in-flight icing conditions that prevented the airplane from being able to maintain altitude.
- [NTSB DCA14FA058](https://openairdocs.org/ntsb/DCA14FA058.md): Embraer EMB145 - EP · Memphis, TN · Accident · No injuries · Class 3 · Field · Final report · Feb 5, 2014 · N802HK · Substantial damage
  > the failure of the flight crew to adequately monitor the system for proper operation and manually activate the system during the flight in icing conditions. Contributing to the accident was the crew's limited training on the manual operation of the anti-ice…
- [NTSB ERA14FA112](https://openairdocs.org/ntsb/ERA14FA112.md): Gulfstream AM Corp Comm Div 690 · Bellevue, TN · Accident · 4 fatal · Field investigation · Final report · Feb 3, 2014 · N840V · Destroyed
  > The pilot's failure to maintain airspeed with one engine inoperative, which resulted in a loss of control while on approach. Contributing to the accident were airframe ice accumulation due to conditions conducive to icing and the loss of engine power on one…
- [NTSB ANC14CA010](https://openairdocs.org/ntsb/ANC14CA010.md): Bellanca 7GCBC · Soldotna, AK · Accident · Minor injuries · Data collection · Final report · Dec 4, 2013 · N88342 · Substantial damage
  > The operation of the airplane by the uncertificated student pilot, his failure to recognize conditions conducive to structural icing, and subsequent decision to depart in conditions conducive to structural icing, resulting in a severe icing encounter and…
- [NTSB WPR14FA094](https://openairdocs.org/ntsb/WPR14FA094.md): Beech B36TC · Yellow Pine, ID · Accident · 5 fatal · Field investigation · Final report · Dec 1, 2013 · N36ML · Destroyed
  > The pilot’s continued flight into known light-to-moderate icing conditions over mountainous terrain. Contributing to the accident was the loss of engine power due to induction icing.
- [NTSB CEN14LA074](https://openairdocs.org/ntsb/CEN14LA074.md): Piper PA 28-181 · Rock Lake, ND · Accident · Serious injuries · Limited investigation · Final report · Dec 1, 2013 · N6780F · Substantial damage
  > The noninstrument-rated pilot’s failure to obtain weather briefings immediately before and during the flight and his continued flight into icing conditions, which resulted in the airplane’s loss of performance and the subsequent controlled descent into trees…
- [NTSB CEN14FA032](https://openairdocs.org/ntsb/CEN14FA032.md): Glasair Aviation USA Sportsman GS-2 · Castle Rock, CO · Accident · Serious injuries · Field investigation · Final report · Oct 29, 2013 · N535SP · Substantial damage
  > The pilot’s improper decision to continue flight into known icing conditions, which adversely affected the airplane’s performance and resulted in a loss of airplane control.
- [NTSB CEN14FA009](https://openairdocs.org/ntsb/CEN14FA009.md): Cessna 500 · Derby, KS · Accident · 2 fatal · Field investigation · Final report · Oct 18, 2013 · N610ED · Destroyed
  > The airplane's encounter with severe icing conditions, which resulted in structural icing, and the pilot's increased workload and subsequent disorientation while maneuvering in instrument flight rules (IFR) conditions with malfunctioning flight instruments,…
- [NTSB ANC13CA107](https://openairdocs.org/ntsb/ANC13CA107.md): Piper PA 18-150 · Wasilla, AK · Accident · No injuries · Data collection · Final report · Sep 30, 2013 · N40579 · Substantial damage
  > The pilot's improper preflight inspection, and failure to remove heavy frost from the airplane prior to attempting a takeoff.
- [NTSB CEN13LA198](https://openairdocs.org/ntsb/CEN13LA198.md): Piper PA 46-350P · Rogers, AR · Accident · No injuries · Limited investigation · Final report · Mar 11, 2013 · N71DH · Substantial damage
  > The pilot’s failure to maintain control due to a sudden turbulence encounter while on final approach. Contributing to the accident was ice buildup on the wings’ leading edges.
- [NTSB DCA13WA050](https://openairdocs.org/ntsb/DCA13WA050.md): Bombardier CL600 2B19 · Almaty, Kazakhstan · Accident · 21 fatal · Foreign investigation · Jan 29, 2013 · UP-CJ006 · Destroyed
  > The Accident Investigation Department of the Ministry of Transport and Communications of the Republic of Kazakhstan has notified the NTSB of an accident involving a Bombardier Challenger CRJ-200, registration UP-CJ006, which occurred on January 29, 2013. The…
- [NTSB CEN13FA130](https://openairdocs.org/ntsb/CEN13FA130.md): Raytheon 58 · Maxwell, NE · Accident · 4 fatal · Field investigation · Final report · Jan 11, 2013 · N36VE · Destroyed
  > The pilot’s inadvertent encounter with severe icing conditions, which resulted in structural icing and the subsequent loss of airplane control.
- [NTSB WPR13FA086](https://openairdocs.org/ntsb/WPR13FA086.md): Beech V35A · Woody, CA · Accident · 2 fatal · Field investigation · Final report · Jan 7, 2013 · N35SD · Destroyed
  > An in-flight encounter with icing conditions during descent, which resulted in the airplane exceeding its critical angle-of-attack and experiencing an aerodynamic stall followed by an in-flight breakup.
- [NTSB CEN13FA122](https://openairdocs.org/ntsb/CEN13FA122.md): Bell Helicopter 407 · Clear Lake, IA · Accident · 3 fatal · Field investigation · Final report · Jan 3, 2013 · N445MT · Destroyed
  > The pilot’s inadvertent encounter with localized icing conditions and his subsequent in-flight loss of helicopter control.
- [NTSB WPR13FA072](https://openairdocs.org/ntsb/WPR13FA072.md): Piper PA-31-350 · Payson, AZ · Accident · 1 fatal · Field investigation · Final report · Dec 19, 2012 · N62959 · Substantial damage
  > The airplane’s inadvertent encounter, in night instrument meteorological conditions, with unforecast strong up- and downdrafts and possibly severe airframe icing conditions (which likely included supercooled large droplets that the airplane was not…
- [NTSB CEN13FA105](https://openairdocs.org/ntsb/CEN13FA105.md): Beech E-90 · Amarillo, TX · Accident · 2 fatal · Field investigation · Final report · Dec 15, 2012 · N67PS · Substantial damage
  > The pilot’s loss of control of the airplane after encountering icing conditions and heavy to extreme turbulence and the subsequent exceedance of the airplane’s design limit, which led to an in-flight breakup.
- [NTSB CEN13FA096](https://openairdocs.org/ntsb/CEN13FA096.md): MBB BK 117 A-3 · Compton, IL · Accident · 3 fatal · Field investigation · Final report · Dec 11, 2012 · N911BK · Substantial damage
  > The inadvertent encounter with inclement weather, including snow, freezing rain, and reduced visibility conditions, which led to the pilot’s spatial disorientation and loss of aircraft control.
- [NTSB WPR13FA041](https://openairdocs.org/ntsb/WPR13FA041.md): American AA-1 · Morgan, UT · Accident · 1 fatal · Field investigation · Final report · Nov 15, 2012 · N5642L · Substantial damage
  > The pilot's inadequate preflight inspection, which resulted in frost remaining on the airplane's surfaces and led to its inability to produce enough lift to clear rising terrain.
- [NTSB CEN13CA005](https://openairdocs.org/ntsb/CEN13CA005.md): Piper PA-24-250 · Colorado Springs, CO · Accident · No injuries · Data collection · Final report · Oct 5, 2012 · N6661P · Substantial damage
  > The pilot’s failure to maintain airspeed during the landing with known structural icing, which resulted in the airplane’s stall. Contributing to the accident was the pilot’s failure to divert to an area where conditions were not conducive to icing.
- [NTSB ANC12CA115](https://openairdocs.org/ntsb/ANC12CA115.md): Cessna 182A · Port Lions, AK · Accident · No injuries · Data collection · Final report · Oct 1, 2012 · N2028G · Substantial damage
  > The pilot's decision to take off with ice- and snow-contaminated wings.
- [NTSB ANC12IA024](https://openairdocs.org/ntsb/ANC12IA024.md): Bombardier Learjet 35A · Anchorage, AK · Incident · No injuries · Incident investigation · Final report · Mar 6, 2012 · N544LM · Minor damage
  > The flightcrew's loss of visual reference to the runway after encountering severe in-flight icing conditions, which resulted in a loss of control while landing and exceedence of the capabilities of the airplane's windscreen anti-ice systems. Contributing to…
- [NTSB CEN12FA161](https://openairdocs.org/ntsb/CEN12FA161.md): Cessna 414A · Hayden, CO · Accident · 2 fatal · Field investigation · Final report · Feb 19, 2012 · N4772A · Substantial damage
  > The pilot’s inadvertent stall during a missed approach. Contributing to the accident was the pilot’s operation of the airplane in forecasted icing conditions without using all of its anti-ice systems.
- [NTSB ANC12CA016](https://openairdocs.org/ntsb/ANC12CA016.md): Cessna 207A · Kwigillingok, AK · Accident · Minor injuries · Data collection · Final report · Dec 21, 2011 · N6480H · Substantial damage
  > The pilot’s decision to continue visual flight into instrument meteorological conditions with moderate icing, which resulted in structural icing and an aerodynamic stall.
- [NTSB ERA12FA115](https://openairdocs.org/ntsb/ERA12FA115.md): Socata TBM 700 · Morristown, NJ · Accident · 5 fatal · Field investigation · Final report · Dec 20, 2011 · N731CA · Destroyed
  > The airplane’s encounter with unforecasted severe icing conditions that were characterized by high ice accretion rates and the pilot's failure to use his command authority to depart the icing conditions in an expeditious manner, which resulted in a loss of…
- [NTSB CEN12CA104](https://openairdocs.org/ntsb/CEN12CA104.md): Cessna 421B · Pampa, TX · Accident · No injuries · Data collection · Final report · Dec 9, 2011 · N421CE · Substantial damage
  > The pilot's inadequate aircraft control during landing, which resulted in a hard landing.
- [NTSB ERA11LA344](https://openairdocs.org/ntsb/ERA11LA344.md): Beech A100 · Gray, TN · Accident · No injuries · Limited investigation · Final report · Jun 15, 2011 · N15L · Substantial damage
  > An encounter with convectively-induced turbulence and icing, which resulted in an in-flight upset and a loss of airplane control.
- [NTSB WPR11FA228](https://openairdocs.org/ntsb/WPR11FA228.md): Bellanca 17-30A · Rock Springs, WY · Accident · 2 fatal · Field investigation · Final report · May 18, 2011 · N93577 · Substantial damage
  > The pilot’s decision to continue flight into an area of known adverse weather, which resulted in an accumulation of structural ice that led to a loss of control and in-flight breakup. Also causal was the pilot’s inadequate preflight weather planning.
- [NTSB ERA11FA182](https://openairdocs.org/ntsb/ERA11FA182.md): Diamond DA-40 · Allagash, ME · Accident · 1 fatal · Field investigation · Final report · Mar 7, 2011 · CGPDO · Substantial damage
  > The pilot's inadvertent encounter with icing conditions, which resulted in an aerodynamic stall and loss of control. Contributing was the pilots’ inadequate preflight weather planning.
- [NTSB CEN11FA144](https://openairdocs.org/ntsb/CEN11FA144.md): Gates Learjet 35A · Springfield, IL · Accident · Minor injuries · Field investigation · Final report · Jan 6, 2011 · N800GP · Substantial damage
  > The pilot’s decision to conduct an instrument approach in icing conditions without the anti-ice system activated, contrary to the airplane flight manual guidance, which resulted in an inadvertent aerodynamic stall due to an in-flight accumulation of airframe…
- [NTSB CEN11CA135](https://openairdocs.org/ntsb/CEN11CA135.md): Allen Raymond H Lancair Legacy · Troy, MI · Accident · No injuries · Data collection · Final report · Dec 25, 2010 · N385AS · Substantial damage
  > The pilot's failure to maintain adequate airspeed during the landing which resulted in an inadvertent stall. Contributing to the accident was the structural icing on the airframe.
- [NTSB ERA11LA099](https://openairdocs.org/ntsb/ERA11LA099.md): Beech F35 · Syracuse, NY · Accident · No injuries · Limited investigation · Final report · Dec 24, 2010 · N3448B · Substantial damage
  > The pilot’s failure to maintain adequate airspeed during landing with airframe structural icing, resulting in an aerodynamic stall and subsequent hard landing. Contributing to the accident was the pilot’s continued flight into known icing conditions.
- [NTSB ERA11FA095](https://openairdocs.org/ntsb/ERA11FA095.md): Mooney M20R · Dundee, NY · Accident · 1 fatal · Field investigation · Final report · Dec 23, 2010 · N968SM · Substantial damage
  > The pilot's decision to operate in known moderate-to-severe icing conditions, which resulted in a loss of control during approach.
- [NTSB CEN10WA331](https://openairdocs.org/ntsb/CEN10WA331.md): Cirrus Design SR20 · Sirdal, Norway · Accident · No injuries · Foreign investigation · May 28, 2010 · LN-BCD · Substantial damage
  > On May 28, 2010, at 1708 coordinated universal time (UTC), a Cirrus Design Corporation model SR20 airplane, s/n 1888, Norwegian registration LN-BCD, was substantially damaged when it impacted mountainous terrain near Sirdal, Norway. The flight had encountered…
- [NTSB ANC10LA019](https://openairdocs.org/ntsb/ANC10LA019.md): Cessna 208B · Kwigillingok, AK · Accident · No injuries · Limited investigation · Final report · Feb 17, 2010 · N207DR · Substantial damage
  > The pilot's decision to take off with ice-contaminated wings in freezing rain and mist, which resulted in an aerodynamic stall.
- [NTSB CEN10LA090](https://openairdocs.org/ntsb/CEN10LA090.md): Beech C-99 · Kearney, NE · Accident · No injuries · Limited investigation · Final report · Jan 6, 2010 · N206AV · Substantial damage
  > The failure of the pilot to maintain adequate airspeed during the approach resulting in a stall. Contributing to the accident was the accumulation of structural icing during the flight.
- [NTSB CEN10LA068](https://openairdocs.org/ntsb/CEN10LA068.md): Beech V35 · Dodge City, KS · Accident · No injuries · Limited investigation · Final report · Dec 6, 2009 · N108L · Substantial damage
  > The failure of the pitot heat system in icing conditions resulting in an inoperative airspeed indicator which led to an inadvertant stall while on final approach. Contributing to the accident was the pilot's decision to fly into known icing conditions.
- [NTSB WPR09LA263](https://openairdocs.org/ntsb/WPR09LA263.md): Lanham Lancair IV · Seligman, AZ · Accident · 2 fatal · Limited investigation · Final report · May 23, 2009 · N144L · Substantial damage
  > The pilot's loss of airplane control during en route descent while operating in known icing conditions.
- [NTSB ANC09LA038](https://openairdocs.org/ntsb/ANC09LA038.md): Cessna TU206 · Bethel, AK · Accident · Minor injuries · Limited investigation · Final report · May 6, 2009 · N629SP · Substantial damage
  > The pilot’s failure to remove visible frost from the wings during the preflight inspection, and his failure to maintain adequate airspeed to avoid a stall. Contributing to the accident were conditions conducive to structural icing/frost.
- [NTSB CEN09LA206](https://openairdocs.org/ntsb/CEN09LA206.md): Cessna 402B · Aberdeen, SD · Accident · No injuries · Limited investigation · Final report · Mar 10, 2009 · N402BP · Substantial damage
  > The pilot's continued flight into adverse weather and icing conditions, and his failure to maintain aircraft control resulting in a hard landing. Contributing to the accident was the accumulation of airframe ice and the strong, gusting crosswinds.
- [NTSB CEN09CA136](https://openairdocs.org/ntsb/CEN09CA136.md): Beech 19 · Lafayette, IN · Accident · No injuries · Data collection · Final report · Jan 18, 2009 · N6509T · Substantial damage
  > The pilot's inadvertent encounter with icing conditions during initial climb. Contributing to the accident were the lack of visibility during the landing due to an ice covered windscreen, and the structural ice that adversely affected the flight…
- [NTSB CEN09FA135](https://openairdocs.org/ntsb/CEN09FA135.md): Gulfstream Aerospace Commander · Wray, CO · Accident · 3 fatal · Field investigation · Final report · Jan 15, 2009 · N840NK · Destroyed
  > The pilot’s failure to maintain aircraft control during the approach resulting in an aerodynamic stall and subsequent impact with terrain. Contributing to the accident was the pilot’s improper preflight planning and conditions conducive for structural icing.
- [NTSB CEN09LA122](https://openairdocs.org/ntsb/CEN09LA122.md): Beech A36TC · Three Rivers, MI · Accident · No injuries · Limited investigation · Final report · Jan 6, 2009 · N92WT · Substantial damage
  > The pilot's decision to continue the flight into an area with conditions that were conducive to icing and the loss of engine power due to induction icing.
- [NTSB CEN09LA095](https://openairdocs.org/ntsb/CEN09LA095.md): Cessna 402 · Madison, WI · Accident · No injuries · Limited investigation · Final report · Dec 17, 2008 · N4504B · Substantial damage
  > The pilot’s improper fuel management, which resulted in a loss of engine power during an instrument landing due to fuel exhaustion.
- [NTSB WPR09CA051](https://openairdocs.org/ntsb/WPR09CA051.md): Beech B60 · Rock River, WY · Accident · No injuries · Data collection · Final report · Nov 29, 2008 · N6693A · Substantial damage
  > The pilot's failure to maintain clearance from a power line due to the lack of forward visibility because of an ice-covered windshield. Contributing to the accident was the flight's encounter with icing weather conditions.
- [NTSB ANC09LA012](https://openairdocs.org/ntsb/ANC09LA012.md): Cessna 207 · Napaskiak, AK · Accident · Minor injuries · Limited investigation · Final report · Nov 14, 2008 · N36CF · Substantial damage
  > The pilot's continued flight into adverse weather and icing conditions, and his failure to maintain sufficient airspeed to avoid a stall, resulting in a loss of control and in-flight collision with terrain while on an approach to land.
- [NTSB NYC08LA176](https://openairdocs.org/ntsb/NYC08LA176.md): Desalvatore Al Lancair IV-P · Snow Hill, NC · Accident · 2 fatal · Limited investigation · Final report · May 8, 2008 · N101BX · Destroyed
  > An inadvertent encounter with icing conditions, resulting in a loss of aircraft control. Contributing to the accident was the pilot's inadequate preflight and in-flight decision making.
- [NTSB DFW08FA131](https://openairdocs.org/ntsb/DFW08FA131.md): Cessna 182 · Black Hawk, CO · Accident · 1 fatal · Field investigation · Final report · May 8, 2008 · N8553S · Substantial damage
  > The loss of engine power due to induction icing. A contributing factor was the pilot's decision to continue flight in conditions favorable for structural and induction-system icing.

Next page: https://openairdocs.org/ntsb-events/210/sequence.md?page=3

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '210' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/210/sequence?page=2

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