- Date
- September 10, 2021, 11:00 local (17:00 UTC)
- Place
- LaSalle, CO
- Injuries
- 2 minor
- Damage
- Substantial damage
- Phase of flight
- Unknown
- Aircraft
- N2099JCessna 172S
- Defining event
- Unknown: Unknown or undetermined
- Weather
- Visual (VMC) · Day
- Status
- Completed · report January 14, 2026
- Report
- Approved by Office Director
- Investigation class
- Class 3
- NTSB office
- Central Region
- Parties
- FAA FSDO
- FAA report
- 20210910012829A
- Case key
- 103843
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
A loss of engine power for undetermined reasons.
Findings · 1
NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.
Sequence of events
The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.
Analysis
** This report was modified on January 13, 2026. Please see the docket for this accident to view the original report. ** The flight instructor and student pilot were conducting a simulated off-field emergency landing as part of a pre-solo cross-country progress check. The flight instructor told the student pilot to break off the maneuver and apply engine power, but the airplane’s engine did not respond when power was added. The flight instructor took control of the airplane and attempted to restart the engine with no success. He then declared an emergency and performed a 180° power-off turn to a field. During the touchdown, the airplane contacted a raised embankment, nosed over, and came to rest inverted. The airplane sustained substantial damage to both wings and the fuselage. A postaccident examination of the airframe and engine showed no preaccident failures or malfunctions that would have precluded normal operation. As a result, the cause of the total loss of engine power could not be determined.
Factual narrative
On September 10, 2021, about 1100 central daylight time , a Cessna 172S airplane, N2099J, was substantially damaged when it was involved in an accident near LaSalle, Colorado. The flight instructor and the student pilot sustained minor injuries. The airplane was operated under the provisions of Title 14 Code of Federal Regulations Part 91 as an instructional flight. The flight was intended as pre-solo cross-country progress check. The flight originated from Rocky Mountain Metropolitan Airport (BJC), Broomfield, Colorado. After 40 minutes of flight, the flight instructor told the student pilot to perform a touch-and-go landing at Greeley-Weld County Airport (GXY), Greeley Colorado, and then navigate back to BJC. After the touch-and-go landing at GXY, the flight instructor initiated a simulated high oil pressure and high temperature scenario as the airplane was in cruise flight at 7,500 ft mean sea level. The student pilot responded by initiating a return to GXY. During the return flight to GXY, the flight instructor reduced the engine power to 2,000 rpm and informed the student pilot that he had a simulated engine fire. The student pilot responded by reducing the engine power to idle and began a descent. Once the flight instructor announced that the simulated engine fire was out, the student pilot established a glide and chose a location for a simulated off-field emergency landing. When the airplane was at an altitude of about 1,000 ft above ground level, the flight instructor determined that the student pilot would safely reach the intended landing location. The flight instructor then instructed the student pilot to apply power, commence a go-around, and fly back to BJC. When the student pilot applied power, the engine did not respond. The flight instructor took control of the airplane and attempted to restart the engine with no success. The flight instructor then declared an emergency and performed a 180° power off turn to a different landing location than the student pilot had selected earlier. During the landing, the airplane contacted a raised embankment, nosed over, and came to rest inverted. The airplane sustained substantial damage to both wings and the fuselage. A postaccident examination of the airframe showed no preaccident failures or malfunctions that would have precluded normal operation. Postaccident examination of the engine showed continuity throughout. Both magnetos produced spark. The fuel lines, fuel distribution manifold, airbox, and fuel pumps were intact. Fuel was observed in the manifold and lines. The spark plugs showed normal signatures. Throttle and mixture cables to the cockpit were connected. The propeller remained attached to the engine at the flange. The spinner was crushed and broken in the aft direction. Both propeller blades were straight and showed little rotational damage.
Aircraft
- Registration
- N2099J
- Reported as
- Cessna 172S
- Category
- Airplane
- Serial number
- 172S9586
- Built
- 2004
- Airframe hours
- 8,429
- Engine
- Lycoming IO-360-L2A, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Operator
- Mcair
- Registered owner
- First Flight Aviation Services LLC
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · May 14, 2021
- Departed
- BJC · Broomfield, CO
- Destination
- BJC · Broomfield, CO
- Flight plan
- Company VFR
- Equipment
- ADS-B
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew · 2
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 41
- Injuries
- Minor
- Certificates
- Commercial, Flight instructor
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Without waivers/limitations
- Last flight review
- May 6, 2021
- Seat
- Right
- Restraint
- 4-point
- Flight hours
- 938 total · 893 in this make and model
- Role
- Student pilot
- Age
- 23
- Injuries
- Minor
- Certificate
- Student
- Medical
- Class 1, Without waivers/limitations
- Seat
- Left
- Restraint
- 4-point
- Flight hours
- 66 total · 66 in this make and model
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Variable at 4 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 82 °F, dew point 43 °F
- Altimeter
- 30.15 inHg
- Observed at
- KGXY, 6 nm away
- METAR
- METAR KGXY 101656Z AUTO VRB04KT 10SM CLR 28/06 A3015 RMK AO2 SLP172 T02780061
Docket · 8
The files NTSB released with the investigation on August 23, 2023, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.7 MB in all.
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
Other investigations on N2099J · 1
Matched to the same aircraft by N-number and date.