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Accidents · NTSB WPR25LA211 · Preliminary: the investigation is not finished

Cessna 172S accident near Sisters, Oregon, July 13, 2025

On July 13, 2025 at about 6:06 pm local time, a 2011 Cessna 172S, registered N787LF, was destroyed in an accident during initial climb near Sisters, Oregon (Sisters Eagle Air airport). It was an instructional flight under general aviation rules (Part 91). 1 person was seriously injured and 2 people had minor injuries. The weather was visual conditions (good weather).

The NTSB's probable cause their words, unchanged

The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.

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

What the record shows

Date
July 13, 2025 · about 6:06 pm local time
Place
Sisters, Oregon · Sisters Eagle Air · map
Type
Accident
Injuries
1 person was seriously injured and 2 people had minor injuries.
Weather
visual conditions (good weather)
Aircraft
Cessna 172S, built 2011 · all 172Ss on the register
Registration
N787LF · registry record · serial 172S11125
Damage
Destroyed
Flight
Instructional flight · general aviation rules (Part 91)

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

On July 13, 2025, about 1106 Pacific daylight time, a Cessna 172S, N787LF, was substantially damaged when it was involved in an accident near Sisters, Oregon. The flight instructor was seriously injured, and the student pilot and pilot rated passenger sustained minor injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 instructional flight. On the day of the accident the trio met at Aurora State Airport (UAO), Aurora, Oregon, for a local area flight. The pilot-rated passenger stated that she does not fly frequently arranged for the flight instructor to act as a safety pilot, while she initially flew the first leg of the flight. They originally wanted to fly toward the coast but due to poor weather conditions they opted to fly to Sisters Eagle Air Airport (6K5), Sisters, Oregon. After landing at 6K5, the airplane was secured, and they went into town. After returning to the airplane, they decided that the return flight to UAO would be a discovery flight for the student pilot. The flight instructor was seated in the front right seat; the student pilot was seated in the front left seat and the pilot rated passenger was seated in the left rear seat. The student pilot and pilot rated passenger noted that the flight instructor did not conduct a preflight inspection of the airplane or use any checklist while starting the engine or while taxiing the airplane for takeoff. The flight instructor reported that upon returning to the airport, he made note of the temperature and estimated they had enough runway to clear the 50 ft obstacles. For the return flight, the pilot rated passenger wanted the flight to be the student pilot’s first introductory flight. The flight instructor configured the airplane with 10° flaps extended, leaned the engine for best power, and utilized the displaced threshold for both taxiing and takeoff on runway 2. He believed the engine was not developing full power, as the airspeed was not building as quickly as he expected. The airplane lifted off the ground, however, had insufficient engine power to sustain the initial climb. The airplane was in a nose-high attitude and the flight instructor realized that the airplane could stall. He lowered the nose and placed the airplane in a “coordinated stall,” while directing the airplane toward an open area. Subsequently, the airplane collided with trees and impacted terrain. After the airplane had came to rest, the student pilot exited the airplane and then assisted both the pilot rated passenger and flight instructor with exiting the airplane. As they exited the airplane, it caught fire. A pilot-rated witness near the accident location reported that, while at 6K5, he watched the airplane taxi to the runway, and takeoff to the north. He further observed that during the takeoff initial climb, the airplane had a high angle of attack and appeared to narrowly miss the tree line, and shortly thereafter made a sharp left turn, and continued line of sight. Shortly after, the witness then saw a cloud of dust followed by a plume of black smoke. He added that he did not hear any engine anomalies during the takeoff. The wreckage was recovered for further examination.

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. Aerodynamic stall/spin during initial climb defining event

The aircraft

  • Airframe total time: 5,514.8 hours
  • Last inspection: 100-hour inspection, June 25, 2025
  • Maximum gross weight: 2,550 lb
  • Seats: 4
  • Landing gear: fixed
  • Operator: Fly North Of Known LLC.

The flight

  • Destination: UAO Aurora OR
  • Flight plan: none
  • A second pilot was aboard

Weather at the time

  • Light: daylight
  • Wind: from 310° at 7 knots
  • Visibility: 10 statute miles
  • Sky: clear
  • Temperature: 84°F (29°C), dew point 52°F (11°C)
  • Altimeter: 30.15 inHg
  • Observation at 10:56 am from KRDM, 17 miles away

Weather report (METAR): KRDM 131756Z 31007KT 10SM CLR 29/11 A3015 RMK AO2 SLP179 T02940106 10294 20133 58001

Injuries

FatalSeriousMinorNone
Flight crew1
Passengers2

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

The NTSB has not released the docket for this case yet. The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), is usually released when the investigation is nearly complete, and the list here is refreshed when it appears. Check at the NTSB.

Other NTSB records under N787LF the same tail number, which may have belonged to a different aircraft at the time

2012-05-27ERA12CA369 · accident near Gainesville, GA · substantial damage · no injuries

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.