# NTSB investigations, WA: Unknown

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.

## Latest cases

- [NTSB WPR20LA279](https://openairdocs.org/ntsb/WPR20LA279.md): Cessna 150 · Quillayute, WA · Accident · Fatal · Class 4 · Limited · Final report · Aug 19, 2020 · N11513 · Substantial damage
  > The airplane’s descent into trees and subsequent impact with terrain for undetermined reasons.
- [NTSB WPR20LA014](https://openairdocs.org/ntsb/WPR20LA014.md): Vans RV 6 · Spanaway, WA · Accident · Serious injuries · Class 3 · Limited · Final report · Oct 23, 2019 · N615RJ · Substantial damage
  > A total loss of engine power during the initial climb for reasons that could not be determined.
- [NTSB WPR12FAMS1](https://openairdocs.org/ntsb/WPR12FAMS1.md): Jeffko Glasair · Tonasket, WA · Accident · 1 fatal · Missing aircraft · Final report · Jul 23, 2012 · N743CA · Substantial damage
  > The cause of the accident is undetermined as the airplane has not been located and remains missing.
- [NTSB WPR09CA474](https://openairdocs.org/ntsb/WPR09CA474.md): Cessna T182T · Granite Falls, WA · Accident · No injuries · Data collection · Final report · Sep 29, 2009 · N2183P · Substantial damage
  > Landing in rugged terrain for undetermined reasons.
- [NTSB SEA05IA115](https://openairdocs.org/ntsb/SEA05IA115.md): Piper PA-46-350P · Tacoma, WA · Incident · No injuries · Incident investigation · Final report · Jun 2, 2005 · N27PG · Minor damage
  > The initiation and propagation of a fatigue crack, over 5,273 hours of cyclic in-flight usage, through approximately 80 percent of the aircraft's right wing spar lower cap.
- [NTSB SEA04LA162](https://openairdocs.org/ntsb/SEA04LA162.md): Universal Moulded Pdts. Monocoach · Pullman, WA · Accident · No injuries · Limited investigation · Final report · Aug 17, 2004 · N11872 · Substantial damage
  > The failure of a landing gear oleo retaining nut safety clip (snap ring) at an unknown point in time, leading to the partial separation of the landing gear strut while in flight, and the full collapse of the strut during the subsequent landing. Factors…
- [NTSB SEA03FA148](https://openairdocs.org/ntsb/SEA03FA148.md): Robinson R22 Beta · Tulalip, WA · Accident · 1 fatal · Field investigation · Final report · Jul 22, 2003 · N7190K · Destroyed
  > A loss of control for unknown reasons.
- [NTSB SEA02LA098](https://openairdocs.org/ntsb/SEA02LA098.md): Unknown Quicksilver MX II · Cook, WA · Accident · 1 fatal · Limited investigation · Final report · Jun 9, 2002 · UNREG · Substantial damage
  > Failure to maintain aircraft control. High winds were a factor.
- [NTSB SEA01LA141](https://openairdocs.org/ntsb/SEA01LA141.md): Taylor Smith Mini DSA-1 · Sultan, WA · Accident · No injuries · Limited investigation · Final report · Jul 22, 2001 · N53BT · Substantial damage
  > The separation/loss of the bolt and castle nut which connected the elevator bellcrank to the control stick pushrod resulting in a disconnect between the cockpit and the control surface and ultimately, the pilot's total loss of pitch control.
- [NTSB SEA01LA102](https://openairdocs.org/ntsb/SEA01LA102.md): Piper PA-18-105 Special · Wilbur, WA · Accident · 1 fatal · Limited investigation · Final report · May 22, 2001 · N7155K · Substantial damage
  > A collision with terrain for undetermined reasons.
- [NTSB SEA01FA070](https://openairdocs.org/ntsb/SEA01FA070.md): Cessna 182P · Fairfield, WA · Accident · 2 fatal · Field investigation · Final report · Apr 11, 2001 · N21565 · Substantial damage
  > The pilot's failure to maintain altitude and/or clearance over trees, resulting in a collision with trees, separation of a wing and uncontrolled collision with terrain. Factors included the pilot's inadequate preflight planning and preparation, dark night…
- [NTSB SEA01LA042](https://openairdocs.org/ntsb/SEA01LA042.md): Cessna 182R · Renton, WA · Accident · No injuries · Limited investigation · Final report · Jan 28, 2001 · N7568T · Substantial damage
  > The worn condition of the hydraulic pump gears which resulted in a continuous running pump, subsequent pump motor overheat and eventually the tripping of the pump motor circuit breaker. An additional cause was the pilot's failure to verify that the landing…
- [NTSB SEA01LA008](https://openairdocs.org/ntsb/SEA01LA008.md): Wildman Adventurer · Yelm, WA · Accident · 1 fatal · Limited investigation · Final report · Oct 23, 2000 · N567AW · Destroyed
  > A main rotor blade strike (impact) with both a pusher propeller blade and the rudder during an unknown phase of operation resulting in a loss of control and uncontrolled descent to terrain.
- [NTSB SEA00LA177](https://openairdocs.org/ntsb/SEA00LA177.md): Cessna 172P · Auburn, WA · Accident · No injuries · Limited investigation · Final report · Sep 3, 2000 · N531PC · Substantial damage
  > Damage to aircraft under unknown circumstances.
- [NTSB SEA00LA116](https://openairdocs.org/ntsb/SEA00LA116.md): Davis/Crouch Avid MK IV · Concrete, WA · Accident · Serious injuries · Limited investigation · Final report · Jun 27, 2000 · N518DC · Substantial damage
  > Fracture of the engine's #1 connecting rod, resulting in a total loss of engine power. Factors were an engine overheat condition experienced at an undetermined time, and no suitable terrain for a forced landing.
- [NTSB SEA99LA149](https://openairdocs.org/ntsb/SEA99LA149.md): Bell 47G-2 · Benton City, WA · Accident · 1 fatal · Limited investigation · Final report · Aug 26, 1999 · N11VH · Destroyed
  > A loss of power for undetermined reasons and the failure of the pilot to maintain adequate rotor RPM following the power loss. Contributing factors were the pilot's lack of certification and total experience.
- [NTSB ANC99LA005](https://openairdocs.org/ntsb/ANC99LA005.md): Beech G-35 · Neah Bay, WA · Accident · 1 fatal · Limited investigation · Final report · Oct 4, 1998 · N4479D · Destroyed
  > Undetermined. Missing Aircraft.
- [NTSB SEA95FAMS1](https://openairdocs.org/ntsb/SEA95FAMS1.md): Piper PA-28-140 · Missing, WA · Accident · 3 fatal · Missing aircraft · Final report · Sep 4, 1995 · N571PA · Destroyed
  > Undetermined until the Missing aircraft is located.
- [NTSB SEA93FAMS1](https://openairdocs.org/ntsb/SEA93FAMS1.md): Cessna 182L · Missing, WA · Accident · 2 fatal · Missing aircraft · Final report · Aug 17, 1993 · N3106R · Destroyed
  > Undetermined.
- [NTSB SEA93LA019](https://openairdocs.org/ntsb/SEA93LA019.md): Beech A35 · Vancouver, WA · Accident · No injuries · Limited investigation · Final report · Oct 27, 1992 · N8501A · Substantial damage
  > Design stress limits of the aircraft were exceeded.
- [NTSB SEA92FA114](https://openairdocs.org/ntsb/SEA92FA114.md): Cessna 172B · Eatonville, WA · Accident · 1 fatal · Field investigation · Final report · May 22, 1992 · N7579X · Destroyed
  > Undetermined.
- [NTSB SEA90FA036](https://openairdocs.org/ntsb/SEA90FA036.md): Piper PA-18 · Longmire, WA · Accident · 2 fatal · Field investigation · Final report · Jan 20, 1990 · N7216K · Destroyed
  > Undetermined.
- [NTSB SEA89LA134](https://openairdocs.org/ntsb/SEA89LA134.md): Mirsepasy 3Q2 · Arlington, WA · Accident · No injuries · Limited investigation · Final report · Jul 18, 1989 · N38AM · Substantial damage
  > Fuel starvation due to a blocked fuel line which resulted in the pilot having to land on unsuitable terrain.
- [NTSB SEA89FA099](https://openairdocs.org/ntsb/SEA89FA099.md): Cushing 4 · Mansfield, WA · Accident · 2 fatal · Field investigation · Final report · Jun 4, 1989 · N5321U · Destroyed
  > Failure of the left wing main spar due to overload for undetermined reasons.
- [NTSB SEA89FA186](https://openairdocs.org/ntsb/SEA89FA186.md): American AA-1A · Enumclaw, WA · Accident · 1 fatal · Field investigation · Final report · Apr 7, 1989 · N9473L · Destroyed
  > Attempted flight into known adverse weather conditions. Factors include clouds, downdrafts, high winds.
- [NTSB SEA88LA188](https://openairdocs.org/ntsb/SEA88LA188.md): Svensson Bushby Mustang II · Everett, WA · Accident · 2 fatal · Limited investigation · Final report · Sep 24, 1988 · N7SV · Destroyed
  > Just prior to the acdnt, witnesses saw the acft in a steep, high speed descent. Impact occurred in soft, marshy terrain & much of the wreckage was buried. No mechanical reason was found for a loss of control; however, the acft was extensively damaged drg…
- [NTSB SEA87FA062](https://openairdocs.org/ntsb/SEA87FA062.md): Cessna 150 · Ellensburg, WA · Accident · 2 fatal · Field investigation · Final report · Jan 8, 1987 · N704HM · Destroyed
  > The two commercially certificated instrument rated flight instructors departed Ellensburg at approximately 1120 PST on a local flight. Both pilots had appointments at 1300 hours PST. VFR conditions prevailed in lower terrain near Ellensburg, however, a…
- [NTSB SEA85FA156](https://openairdocs.org/ntsb/SEA85FA156.md): Kibler-Bede BD-5B · Oak Harbor, WA · Accident · 1 fatal · Field investigation · Final report · Jun 29, 1985 · N5KB · Destroyed
  > Prior to the acdnt, witnesses aprx 9 mi sw of the crash site saw an acft (matching the description of N5KB) flying at about 100 to 200 ft over the water on a NE heading. It then pulled up in a steep climbing turn toward the shoreline. No known witnesses saw…
- [NTSB SEA85FA086](https://openairdocs.org/ntsb/SEA85FA086.md): Piper PA-18-150 · Sunnyside, WA · Accident · 1 fatal · Field investigation · Final report · Apr 7, 1985 · N4379Z · Destroyed
  > The acft crashed after colliding with electrical power lines near an open field. Initial impact with the power lines occurred where the wires were routed over a draw between 2 ridges. The acft came to rest inverted between the power lines & the open field.…
- [NTSB SEA83AA176](https://openairdocs.org/ntsb/SEA83AA176.md): Fairchild Hiller FH-1100 · Toutle, WA · Accident · 5 fatal · Final report · Aug 13, 1983 · N29917 · Destroyed
  > The helicopter took off on a sight-seeing, passenger flt in the mount st helens area. When the flt became overdue, a search was initiated. Later, the helicopter was found where it crashed & burned in a heavily wooded area on relatively level terrain, near the…
- [NTSB SEA83FA033](https://openairdocs.org/ntsb/SEA83FA033.md): Bell 214B · Near Randle, WA · Accident · 2 fatal · Field investigation · Final report · Dec 18, 1982 · N244PH · Destroyed
  > The acft departed a private heliport & impacted a mountain at the 3,400 ft level. The wreckage was located about one mile east from the heliport. The impact site was hidden behind a ridge & is not visible from the heliport or the access road to the heliport.…
- [NTSB SEA79FA034](https://openairdocs.org/ntsb/SEA79FA034.md): Cessna 172 · Camas, WA · Accident · 2 fatal · Closed · Feb 9, 1979 · N12752 · Destroyed
- [NTSB SEA72AS026](https://openairdocs.org/ntsb/SEA72AS026.md): Piper PA-28R · Paradise, WA · Accident · 3 fatal · Closed · Jan 13, 1972 · N3025R · Destroyed
- [NTSB SEA69D0005](https://openairdocs.org/ntsb/SEA69D0005.md): Cessna 195A · Omak, WA · Accident · No injuries · Closed · Jun 7, 1968 · N1560D · Substantial damage
- [NTSB SEA68F0254](https://openairdocs.org/ntsb/SEA68F0254.md): Stinson 108-3 · Yakima, WA · Accident · No injuries · Closed · Mar 13, 1968 · N6116M · Substantial damage
- [NTSB UNK64X3204](https://openairdocs.org/ntsb/UNK64X3204.md): Mooney M20 · La Touche, WA · Accident · 1 fatal · Closed · Aug 3, 1964 · N5294B · Destroyed
- [NTSB UNK64X0377](https://openairdocs.org/ntsb/UNK64X0377.md): Piper J3C-65 · Puget Sound, WA · Accident · 1 fatal · Closed · Jan 26, 1964 · N98319 · Destroyed

## The whole list in SQL

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

```sql
WITH phase_names(main, name) AS (VALUES (100, 'Prior to flight'), (150, 'Standing'), (200, 'Pushback/towing'), (250, 'Taxi'), (300, 'Takeoff'), (350, 'Initial climb'), (400, 'Enroute'), (450, 'Maneuvering'), (500, 'Approach'), (550, 'Landing'), (600, 'Emergency descent'), (650, 'Uncontrolled descent'), (700, 'Post-impact'), (750, 'After landing'), (800, 'Other'), (990, 'Unknown')),
  crosswalk(code, main, name) AS (VALUES (500, 150, 'Standing'), (501, 150, 'Standing - pre-flight'), (502, 150, 'Standing - starting engine(s)'), (503, 150, 'Standing - engine(s) operating'), (504, 150, 'Standing - engine(s) not operating'), (505, 150, 'Standing - idling rotors'), (510, 250, 'Taxi'), (511, 200, 'Taxi - pushback/tow'), (512, 250, 'Taxi - to takeoff'), (513, 250, 'Taxi - from landing'), (514, 250, 'Taxi - aerial'), (520, 300, 'Takeoff'), (521, 300, 'Takeoff - roll/run'), (522, 350, 'Takeoff - initial climb'), (523, 300, 'Takeoff - aborted'), (530, 400, 'Climb'), (531, 400, 'Climb - to cruise'), (540, 400, 'Cruise'), (541, 400, 'Cruise - normal'), (542, 400, 'Maneuvering - holding (IFR)'), (550, 400, 'Descent'), (551, 400, 'Descent - normal'), (552, 600, 'Descent - emergency'), (553, 650, 'Descent - uncontrolled'), (560, 500, 'Approach'), (561, 500, 'Approach - VFR pattern - downwind'), (562, 500, 'Approach - VFR pattern - base turn'), (563, 500, 'Approach - VFR pattern - base leg/base to final'), (564, 500, 'Approach - VFR pattern - final approach'), (565, 500, 'Go-around (VFR)'), (566, 500, 'Approach - IAF to FAF/outer marker (IFR)'), (567, 500, 'Approach - FAF/outer marker to threshold (IFR)'), (568, 500, 'Circling (IFR)'), (569, 500, 'Missed approach (IFR)'), (570, 550, 'Landing'), (571, 550, 'Landing - flare/touchdown'), (572, 550, 'Landing - roll'), (573, 550, 'Landing - aborted'), (574, 550, 'Emergency landing'), (575, 550, 'Emergency landing after takeoff'), (576, 600, 'Emergency descent/landing'), (580, 450, 'Maneuvering'), (581, 450, 'Maneuvering - aerial application'), (582, 450, 'Maneuvering - turn to reverse direction'), (583, 450, 'Maneuvering - turn to landing area (emergency)'), (590, 450, 'Hover'), (591, 450, 'Hover - in ground effect'), (592, 450, 'Hover - out of ground effect'), (600, 800, 'Other'), (610, 990, 'Unknown')),
  current_codes AS (
    SELECT e.case_mkey, TRY_CAST(e."tier1Number" AS INTEGER) AS code,
      row_number() OVER (PARTITION BY e.case_mkey ORDER BY coalesce(e."isDefiningEvent", false) DESC, e.position) AS n
    FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e
    WHERE e.aircrafts_position = 1 AND e."tier1Number" GLOB '[1-9][0-9]*'
      AND (e."isDefiningEvent" OR e.case_mkey IN (SELECT "mKey" FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' WHERE "isPre1982"))
  ),
  phases AS (
    SELECT case_mkey, 'current' AS scheme, code, CASE WHEN code >= 990 THEN 990 ELSE code // 50 * 50 END AS main
    FROM current_codes WHERE n = 1
    UNION ALL
    SELECT o.case_mkey, 'older', o."phaseOfFlightCode", w.main
    FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o JOIN crosswalk w ON w.code = o."phaseOfFlightCode"
    WHERE o.aircrafts_position = 1 AND o."occurrenceNumber" = 1 AND o.case_mkey NOT IN (SELECT case_mkey FROM current_codes)
  ),
  case_phases AS (
    SELECT p.*, c."eventDate", c."highestInjuryLevel" = 'Fatal' AS fatal, a.aircraft_model_code
    FROM phases p JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c."mKey" = p.case_mkey
    LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = p.case_mkey AND a.position = 1
    WHERE c."eventDate" >= DATE '1962-01-01' AND p.main IN (SELECT main FROM phase_names)
  )
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."eventStateOrRegion" = 'WA' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 990)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/990/cases?state=WA

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.