# NTSB investigations, CO: Standing

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 DCA25LA308](https://openairdocs.org/ntsb/DCA25LA308.md): Airbus Canada BD500 · Denver, CO · Accident · Serious injuries · Class 4 · Limited · Final report · Aug 31, 2025 · C-GYLQ · No damage
  > Unidentified burned debris in an aft galley oven, which generated smoke and odor in the cabin and led to an air turnback and subsequent evacuation, during which a serious injury occurred.
- [NTSB DCA25FA159](https://openairdocs.org/ntsb/DCA25FA159.md): Boeing 737-823 · Denver, CO · Accident · Minor injuries · Class 3 · Field · Preliminary report · Mar 13, 2025 · N885NN · Substantial damage
  > On March 13, 2025, about 1759 mountain daylight time, American Airlines flight 1006, Boeing 737-823, N885NN, experienced engine vibrations during takeoff from Colorado Springs Airport (COS), Colorado Springs, Colorado. The flight crew continued the takeoff,…
- [NTSB CEN17LA350](https://openairdocs.org/ntsb/CEN17LA350.md): Embraer EMB 120ER · Greeley, CO · Accident · No injuries · Limited investigation · Final report · Sep 13, 2017 · N121CZ · Substantial damage
  > The bus driver's failure to maintain clearance from the standing airplane during dark night conditions. Contributing to the accident was the airport's lack of an escort for the bus.
- [NTSB DCA17CA005](https://openairdocs.org/ntsb/DCA17CA005.md): Boeing 737-8H4 · Denver, CO · Accident · Serious injuries · Data collection · Final report · Oct 5, 2016 · N8324A · No damage
  > the flight attendant losing her balance as she was removing her carry-on baggage resulted in her falling against an arm rest causing the serious injury.
- [NTSB CEN09CA367](https://openairdocs.org/ntsb/CEN09CA367.md): Cessna 152 · Fort Collins, CO · Accident · No injuries · Data collection · Final report · Jun 18, 2009 · N95144 · Substantial damage
  > The pilot's failure to control the airplane after engine startup, resulting in a ground collision with a nearby airplane.
- [NTSB ENG09IA007](https://openairdocs.org/ntsb/ENG09IA007.md): Boeing 757-222 · Denver, CO · Incident · No injuries · Incident investigation · Final report · Jun 10, 2009 · N570UA · Minor damage
  > There was a malfunction of the electronic engine control (EEC) burner pressure (Pb) sensor that had an abnormally high indication that resulted in an excessive amount of fuel being pumped into the engine that was still at a sub-idle condition. Because the…
- [NTSB LAX08CA209](https://openairdocs.org/ntsb/LAX08CA209.md): Aerostar International S-77A · Boulder, CO · Accident · Minor injuries · Data collection · Final report · Jul 2, 2008 · N9014W · Substantial damage
  > An encounter with a sudden gust of wind, which rendered the balloon uncontrollable and led to a collision with a tree.
- [NTSB DEN06LA037](https://openairdocs.org/ntsb/DEN06LA037.md): Interstate S-1A · Rocky Ford, CO · Accident · No injuries · Limited investigation · Final report · Jan 31, 2006 · N28315 · Substantial damage
  > the pilot's failure to use tie downs before attempting to hand-start the engine. A contributing factor was his failure to seek adequate assistance.
- [NTSB DEN06IA034](https://openairdocs.org/ntsb/DEN06IA034.md): Boeing B777-200B · Denver, CO · Incident · No injuries · Incident investigation · Final report · Jan 19, 2006 · N798UA · Minor damage
  > the truck driver's failure to maintain clearance from the airplane and the boom operator's failure to adequately clear the boom from the airplane. Contributing to the accident was the low visibility due to snow and mist.
- [NTSB DEN06CA033](https://openairdocs.org/ntsb/DEN06CA033.md): Cessna 172M · Denver, CO · Accident · No injuries · Data collection · Final report · Jan 18, 2006 · N1322U · Substantial damage
  > the pilot's failure to align the airplane's nose into the direction of the wind while performing the pre-takeoff checklist. A contributing factor was the gusty wind conditions.
- [NTSB DEN06IA019](https://openairdocs.org/ntsb/DEN06IA019.md): Beech 1900D · Telluride, CO · Incident · No injuries · Incident investigation · Final report · Nov 23, 2005 · N253GL · Minor damage
  > The tug driver's failure to maintain adequate clearance from the airplane resulting in the baggage cart striking the airplane's stabilon. A factor contributing to the incident was the tug driver's failure to consider the extra height of the cart in relation…
- [NTSB DEN05IA092](https://openairdocs.org/ntsb/DEN05IA092.md): Beech 1900D · Grand Junction, CO · Incident · No injuries · Incident investigation · Final report · Jun 26, 2005 · N240GL · Minor damage
  > the flight crew's diverted attention while the number 2 engine was operating and failure to maintain aircraft control which resulted in an inadvertent taxi of the airplane into an airport security fence.
- [NTSB DEN05LA048](https://openairdocs.org/ntsb/DEN05LA048.md): Boeing 737-724 · Gunnison, CO · Accident · Minor injuries · Limited investigation · Final report · Jan 8, 2005 · N16732 · Substantial damage
  > the snowplow driver's failure to see the airplane during plowing operations. Factors contributing to the accident were the snowplow driver's excessive speed and the snow.
- [NTSB DEN05IA046](https://openairdocs.org/ntsb/DEN05IA046.md): Beech 1900D · Denver, CO · Incident · Minor injuries · Incident investigation · Final report · Jan 4, 2005 · N202UX · Minor damage
  > the tug driver's failure to maintain operational control of the tug, resulting in impact with an airplane. Contributing factors include the tug driver's improper procedure, the tug driver's inadequate initial ground equipment training, and the…
- [NTSB DEN04LA053](https://openairdocs.org/ntsb/DEN04LA053.md): Cessna C172 · Broomfield, CO · Accident · No injuries · Limited investigation · Final report · Mar 26, 2004 · N5345G · 2 aircraft · Substantial damage
  > the pilot of the Maule's failure to maintain a visual lookout.
- [NTSB DEN03IA032](https://openairdocs.org/ntsb/DEN03IA032.md): Hawker Siddeley HS-125-700A · Telluride, CO · Incident · No injuries · Incident investigation · Final report · Jan 4, 2003 · N270KA · Minor damage
  > the overheated and burned venturi fan motor.
- [NTSB DEN02LA098](https://openairdocs.org/ntsb/DEN02LA098.md): Schweizer 269C · Broomfield, CO · Accident · No injuries · Limited investigation · Final report · Aug 20, 2002 · N7508L · Substantial damage
  > maintenance personnel's failure to secure the landing skid oleo strut bolt during the last 50-hour inspection, causing the left rear skid to collapse and the tail rotor to strike the ground.
- [NTSB DEN01FA157](https://openairdocs.org/ntsb/DEN01FA157.md): Boeing 777-236 · Denver, CO · Accident · 1 fatal · Field investigation · Final report · Sep 5, 2001 · G-VIIK · Substantial damage
  > the overstress fracture of the airplane's refueling adapter ring that resulted from the abnormal angular force applied to it. The applied angular force occurred due to the ground refueler inadequately positioning the hydrant fuel truck (in relation to the…
- [NTSB DEN99LA047](https://openairdocs.org/ntsb/DEN99LA047.md): Swearingen SA226TC · Denver, CO · Accident · No injuries · Limited investigation · Final report · Mar 5, 1999 · N151SA · 2 aircraft · Substantial damage
  > The pilot of N328BA's failure to maintain visual lookout while taxiing, causing the subsequent collision with N151SA.
- [NTSB FTW98LA003](https://openairdocs.org/ntsb/FTW98LA003.md): Cessna 172A · Grand Junction, CO · Accident · No injuries · Limited investigation · Final report · Oct 3, 1997 · N7692T · Substantial damage
  > Encounter with high gusting winds while standing with the engine running
- [NTSB FTW97LA177](https://openairdocs.org/ntsb/FTW97LA177.md): Boeing 737-201 · Denver, CO · Accident · Serious injuries · Limited investigation · Final report · May 4, 1997 · N217US · No damage
  > The flight attendant's failure to assure that the jetway was placed in the proper position prior to opening the forward cabin entry door.
- [NTSB FTW97LA026](https://openairdocs.org/ntsb/FTW97LA026.md): Piper PA-28C-180 · Sterling, CO · Accident · Serious injuries · Limited investigation · Final report · Oct 24, 1996 · N9020J · No damage
  > improper starting procedure used by the airport employee. Factors relating to the accident were: the inoperative starter, and failure of the pilot to seek proper assistance.
- [NTSB FTW95LA127](https://openairdocs.org/ntsb/FTW95LA127.md): Israel Aircraft Industries 1124 · Denver, CO · Accident · No injuries · Limited investigation · Final report · Feb 21, 1995 · N66JE · Substantial damage
  > An oxygen leak at the oxygen system pressure reducer-regulator assembly, resulting in a crew compartment fire.
- [NTSB DEN93FA066](https://openairdocs.org/ntsb/DEN93FA066.md): Cessna 310J · Broomfield, CO · Accident · Minor injuries · Field investigation · Final report · Jun 5, 1993 · N3005L · Destroyed
  > Friction of escaping oxygen under high pressure igniting a lubricant in the nosewheel well area, and improper aircraft servicing by maintenance personnel.
- [NTSB DEN92IA050](https://openairdocs.org/ntsb/DEN92IA050.md): Boeing 757-222 · Denver, CO · Incident · 1 fatal · Incident investigation · Final report · May 4, 1992 · N530UA · No damage
  > The captain suffered a fatal heart attack.
- [NTSB DEN91LA090](https://openairdocs.org/ntsb/DEN91LA090.md): Piper PA-32-300 · Englewood, CO · Accident · No injuries · Limited investigation · Final report · Jun 19, 1991 · N4064R · Substantial damage
  > The pilot's failure to maintain visual lookout. A factor was: the pilot's improper use of the throttle controls and brakes.
- [NTSB DEN91LA082](https://openairdocs.org/ntsb/DEN91LA082.md): Boeing DHC-6-300 · Denver, CO · Accident · No injuries · Limited investigation · Final report · Jun 12, 1991 · N242CA · Substantial damage
  > The pilot's failure to perform an adequate preflight, I.e., not following the check list and the normal brake system was inoperative as a result of no hydraulic system pressure (hydraulic system circuit breaker not 'in').
- [NTSB DEN88LA116](https://openairdocs.org/ntsb/DEN88LA116.md): Cessna TR-182RG · Englewood, CO · Accident · Serious injuries · Limited investigation · Final report · Jun 1, 1988 · N999HP · No damage
  > The CFI, a private rated dual student, and one passenger were preparing to depart on a training flight. The CFI attempted to hand prop the airplane when the battery was found to be inoperative. During the attempt, the CFI was struck in the back of the head.
- [NTSB DEN83FA021](https://openairdocs.org/ntsb/DEN83FA021.md): Mcdonald Douglas DC-10 · Denver, CO · Accident · No injuries · Field investigation · Final report · Nov 19, 1982 · N68056 · Substantial damage
  > During the taxi for takeoff, the crew noted a hydraulic malfunction on the right main gear and returned to the gate for maintenance. The aircraft was shut down and turned over to the maintenance crew for repair. The passengers were not deplaned. During…
- [NTSB DEN79DTE49](https://openairdocs.org/ntsb/DEN79DTE49.md): Cessna 150 · Greeley, CO · Accident · No injuries · Closed · Jun 19, 1979 · N8995V · No damage
- [NTSB DEN79DA043](https://openairdocs.org/ntsb/DEN79DA043.md): Hiller UH-12L · Montrose, CO · Accident · No injuries · Closed · Jun 13, 1979 · N5349V · Substantial damage
- [NTSB DEN76ID013](https://openairdocs.org/ntsb/DEN76ID013.md): Cessna 177 · Loveland, CO · Incident · 1 fatal · Closed · Aug 29, 1975 · N2181Q · Minor damage
- [NTSB DEN75ATE28](https://openairdocs.org/ntsb/DEN75ATE28.md): Cessna 150J · Kim, CO · Accident · No injuries · Closed · Oct 18, 1974 · N5058Z · Substantial damage
- [NTSB DEN75FTE17](https://openairdocs.org/ntsb/DEN75FTE17.md): Cessna 172 · Colo Springs, CO · Accident · No injuries · Closed · Aug 13, 1974 · N13548 · Substantial damage
- [NTSB DEN74DTE83](https://openairdocs.org/ntsb/DEN74DTE83.md): Cessna 172 · Pueblo, CO · Accident · Serious injuries · Closed · May 8, 1974 · N79470 · No damage
- [NTSB DEN73FTE66](https://openairdocs.org/ntsb/DEN73FTE66.md): Piper PA-32 · Aurora, CO · Accident · Serious injuries · Closed · Mar 14, 1973 · N3234W · Minor damage
- [NTSB DEN72AD006](https://openairdocs.org/ntsb/DEN72AD006.md): Cessna T210G · Grand Junctn, CO · Accident · 1 fatal · Closed · Aug 21, 1971 · N6893R · Minor damage
- [NTSB DEN69D0143](https://openairdocs.org/ntsb/DEN69D0143.md): Cessna 150 · Colo Springs, CO · Accident · No injuries · Closed · Oct 17, 1968 · N8880G · Substantial damage
- [NTSB DEN68D0236](https://openairdocs.org/ntsb/DEN68D0236.md): Cessna 150 · Greeley, CO · Accident · No injuries · Closed · Mar 23, 1968 · N6499S · 2 aircraft · Substantial damage
- [NTSB UNK65X1533](https://openairdocs.org/ntsb/UNK65X1533.md): Callair A-9 · La Veta, CO · Accident · 1 fatal · Closed · Sep 11, 1965 · XB-ZIB · Destroyed
- [NTSB UNK65X1240](https://openairdocs.org/ntsb/UNK65X1240.md): Ryan ST3KR · Colorado Spgs, CO · Accident · Minor injuries · Closed · Jan 6, 1965 · N53998 · Minor damage
- [NTSB UNK65X0380](https://openairdocs.org/ntsb/UNK65X0380.md): Hiller UH12E · Bond, CO · Accident · 1 fatal · Closed · Oct 22, 1964 · N9748C · Substantial damage
- [NTSB UNK64X3123](https://openairdocs.org/ntsb/UNK64X3123.md): Cessna 182 · Longmont, CO · Accident · No injuries · Closed · Jul 30, 1964 · N6263A · Substantial damage
- [NTSB UNK64X0109](https://openairdocs.org/ntsb/UNK64X0109.md): Cessna 120 · Denver, CO · Accident · No injuries · Closed · Jan 1, 1964 · N73038 · Substantial damage

## 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" = 'CO' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT case_mkey FROM case_phases WHERE main = 150)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-phases/150/cases?state=CO

---
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.