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Accidents · NTSB CEN22FA197 · Final report

Cessna 172 accident near Broomfield, Colorado, May 11, 2022

On May 11, 2022 at about 6:35 pm local time, a 1977 Cessna 172, registered N73670, was destroyed in an accident during approach (VFR pattern final) near Broomfield, Colorado (Rocky Mountain Metro Airport). It was a personal flight under general aviation rules (Part 91). 1 person was killed. The weather was visual conditions (good weather).

The NTSB's probable cause their words, unchanged

The pilot’s failure to maintain control of the airplane for reasons that could not be determined.

Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.

What the record shows

Date
May 11, 2022 · about 6:35 pm local time
Place
Broomfield, Colorado · Rocky Mountain Metro Airport · map
Type
Accident
Injuries
1 person was killed.
Weather
visual conditions (good weather)
Aircraft
Cessna 172 N, built 1977 · all 172s on the register
Registration
N73670 · no longer on the register · serial 17267604
Damage
Destroyed
Flight
Personal flight · general aviation rules (Part 91)

The NTSB's narrative final · quoted from the NTSB record

Flight track data indicated that the pilot was returning to the departure airport. The pilot had flown to a nearby airport and then performed several flight maneuvers in a nearby practice area. He performed a touch and go landing and then remained in the traffic pattern. The air traffic controller instructed the pilot to widen his downwind leg, due to traffic, and changed the landing runway to the parallel runway. The pilot performed a right turn to the base leg, and after the airplane was established on final, it abruptly turned to the north and descended rapidly. The airplane impacted an intersection about ½ nautical mile (nm) northwest of the approach end of the runway. The airplane impacted the ground and a traffic light pole and came to rest on a sidewalk. A postimpact fire ensued and the airplane was destroyed. Two witnesses reported that the airplane was not in an aerodynamic stall or spin. One witness reported that the airplane appeared to be in a “gentle” left-hand turn and descent, with about 15-20° of bank. They did not observe any flight control movements, nor was there any smoke or fire from the airplane. There were no abnormal engine noises, and the airplane was structurally intact while in flight. A review of local area security camera footage showed the airplane established on final approach. The airplane then turned abruptly to the north and descended rapidly before it impacted the ground. Postaccident examination revealed no preimpact mechanical malfunctions or failures with the airframe or engine that would have precluded normal operation. A review of meteorological data showed that low-level windshear was possible. Additionally, the estimated density altitude at the airport was 8,578 ft above msl at the time of the accident. However, based on the witness statements and the security camera footage, neither windshear nor the high density altitude appeared to play a role in the airplane’s sudden departure from the approach path. The reasons for the loss of control in flight could not be determined.

The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.

The factual record from the NTSB's investigation tables, in plain English

What happened, in order

  1. Loss of control in flight during approach (VFR pattern final) defining event
  2. Unknown or undetermined during approach (VFR pattern final)
  3. Collision with terrain or object (not controlled flight into terrain) during approach (VFR pattern final)

The NTSB's findings

  • Personnel issues › Task performance › Use of equip/info › Aircraft control › Pilot
  • Not determined › Not determined › (general) › (general) › Unknown/Not determined

Pilot

  • Certificate: private
  • Ratings: single-engine land; instrument: airplane
  • Flight time: 220 hours in all; 114 as pilot in command
  • Last flight review: May 5, 2022
  • Medical certificate: Class 3 (without waivers/limitations)
  • Seat: left
  • Injury: fatal

The aircraft

  • Airframe total time: 4,800.7 hours
  • Last inspection: 100-hour inspection, April 26, 2022
  • Maximum gross weight: 2,300 lb
  • Seats: 4
  • Landing gear: fixed
  • Engine: Lycoming Engines O-320-H2AD (piston); 0 hours total
  • Fire on the ground

The flight

  • Flight plan: none
  • Runway 12L, 9,000 ft by 100 ft

Weather at the time

  • Light: daylight
  • Wind: from 220° at 13 knots, gusting 23
  • Visibility: 10 statute miles
  • Sky: scat at 24,000 ft
  • Temperature: 84°F (29°C), dew point 19°F (-7°C)
  • Altimeter: 29.90 inHg
  • Observation at 12:38 pm from KBJC, 1 miles away

Weather report (METAR): KBJC 111838Z 22013G23KT 10SM SCT240 29/M07 A2990 RMK AC ACCIDENT

Injuries

FatalSeriousMinorNone
Flight crew1

Documents from the investigation the NTSB's docket: the evidence folder behind the report

21 documents, released by the NTSB on August 15, 2023. View them here, or download them; the NTSB redacts some personal details before release, and this site shows the NTSB's own titles rather than its file names.

#DocumentWhat it is
1 Pilot/operator Aircraft Accident Report, NTSB Form 6120.1 PDF, 9 pages · our copy View Download
2 Broomfield Police Department Report PDF, 32 pages · our copy View Download
3 Accident Photographs PDF, 10 pages · our copy View Download
4 Rocky Mountain Metropolitan Airport Security Video - Windsock Area (.Avi File) AVI file · our copy Download
5 Pilatus Aircraft Security Video - Front of Building Parking Lot (.MP4 File) video · our copy View Download
6 Pilatus Aircraft Security Video - Front of Building Flag Poles (.MP4 File) video · our copy View Download
7 Pilatus Aircraft Secuity Video - Loading Dock (.MP4 File) video · our copy View Download
8 Various Statements PDF, 11 pages · our copy View Download
9 N73670 ADS-B Data (Google Earth .Kmz File) map file · our copy Download
10 N73670 ADS-B Data (Microsoft Excel .Xlsx File) spreadsheet · our copy Download
11 FAA Air Traffic Control Accident Information PDF, 3 pages · our copy View Download
12 NTSB Airframe and Engine Examination Report PDF, 7 pages · our copy View Download
13 Meteorology Specialist's Factual Report PDF, 9 pages · our copy View Download
14 Most Recent Airplane Maintenance Entries PDF, 4 pages · our copy View Download
15 Pilot Logbook PDF, 11 pages · our copy View Download
16 Pilot - Training Information PDF, 7 pages · our copy View Download
17 American Flight Schools - Pilot Recent Flight Information (Microsoft Excel .Xlsx File) spreadsheet · our copy Download
18 Toxicological Report PDF, 1 page · our copy View Download
19 Autopsy Memorandum of Record PDF, 1 page · our copy View Download
20 NTSB Wreckage Release Form PDF, 1 page · our copy View Download
21 NTSB Party Member Form - Textron Aviation PDF, 1 page · our copy View Download

The same docket at the NTSB.

Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.