Tuesday, September 07, 2021

Monnett Moni, N983JV: Fatal accident occurred September 06, 2021 near Harvey Young Airport (1H6), Tulsa, Oklahoma

This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed. 

The National Transportation Safety Board did not travel to the scene of this accident. 

 Additional Participating Entity: 
Federal Aviation Administration / Flight Standards District Office; Oklahoma City, Oklahoma

Location: Tulsa, OK 
Accident Number: CEN21LA396
Date & Time: September 6, 2021, 10:25 Local
Registration: N983JV
Aircraft: Monnett Moni
Injuries: 1 Fatal
Flight Conducted Under: Part 91: General aviation - Personal

On September 6, 2021, about 1025 central daylight time, an amateur built Monnett Moni glider, N983JV, was substantially damaged when it was involved in an accident near Tulsa, Oklahoma. The pilot was fatally injured. The flight operated as a Title 14 Code of Federal Regulations Part 91 personal flight.

Preliminary information obtained by the responding Federal Aviation Administration inspectors indicated that the glider entered a stall/spin and impacted terrain under unknown circumstances.

The glider was retained for further examination.

Aircraft and Owner/Operator Information

Aircraft Make: Monnett
Registration: N983JV
Model/Series: Moni NO SERIES 
Aircraft Category: Glider
Amateur Built: Yes
Operator: On file
Operating Certificate(s) Held: None
Operator Designator Code:

Meteorological Information and Flight Plan

Conditions at Accident Site: VMC 
Condition of Light: Day
Observation Facility, Elevation: KTUL,650 ft msl 
Observation Time: 10:53 Local
Distance from Accident Site: 5 Nautical Miles
Temperature/Dew Point: 29°C /17°C
Lowest Cloud Condition: Clear
Wind Speed/Gusts, Direction: 6 knots / , 180°
Lowest Ceiling: None
Visibility: 10 miles
Altimeter Setting: 30.06 inches Hg 
Type of Flight Plan Filed:
Departure Point:

Wreckage and Impact Information

Crew Injuries: 1 Fatal
Aircraft Damage: Substantial
Passenger Injuries:
Aircraft Fire: None
Ground Injuries: 
Aircraft Explosion: None
Total Injuries: 1 Fatal
Latitude, Longitude: 36.132952,-95.825555 (est)

Those who may have information that might be relevant to the National Transportation Safety Board (NTSB) investigation may contact them by email witness@ntsb.gov, and any friends and family who want to contact investigators about the accident should email assistance@ntsb.gov. You can also call the NTSB Response Operations Center at 844-373-9922 or 202-314-6290.

UPDATE: The Tulsa Police Department has reveled that the pilot is out of surgery and in serious condition. 

TPD also said that the plane was a Monnett Moni.

No one else was injured and nothing else was damaged other than the plane in the crash.


TULSA, Oklahoma  (KTUL) -- A pilot was taken to the hospital Monday after crashing shortly after takeoff from Harvey Young Airport in Tulsa.

Tulsa police say an experimental aircraft crashed near East 21st Street and South 129th East Avenue around 10:30 a.m.

Another pilot at the airport and people driving nearby saw the plane crash and called 911.

The pilot was taken to the hospital in unknown condition.

The cause of the crash is under investigation by the National Transportation Safety Board.


  1. Almost as if he was aiming for the trees to absorb the impact. Hard to tell really, pure speculation. That was a hard hit in any case.

    1. Lol, no. If you had control and could "aim for the trees" why would you not just fly the plane and not hit anything? This was a total loss of control. He wasn't aiming for anything because the aircraft was out of control.

  2. The plane came down basically on the airport perimeter, into the parking lot of one of the two churches at the approach end of runway 35. It looks like a classic stall-spin straight into the ground. I don't know if this happened during landing or just after takeoff. I hope the pilot has a speedy recovery. I really like the Moni design, cute little motorgliders.

    1. Why can't some people read the info before commenting?
      "I don't know if this happened during landing or just after takeoff".

    2. "Why can't some people read the info before commenting?"

      Why can't some people realize that once an aircraft leaves the ground all crashes happen after takeoff? Witnesses might say the plane was landing when it's an impossible turn after engine failure. They may say it was taking off after a go-around. I made an effort to take the information in the article as raw data subject to verification by investigating authorities as opposed to accepting an initial media report as probable cause. Now you know why.

    3. Here you go bud.
      "TULSA, Oklahoma (KTUL) -- A pilot was taken to the hospital Monday after crashing shortly after takeoff from Harvey Young Airport in Tulsa".
      LOOK at the video! Again, why some people comment without a clue????

    4. "Here you go bud."
      I saw the videos and honestly the irony of not having a clue is incredible! Do either of the videos show an aircraft in any other condition but a dive into the ground? Without context, could any reasonable person say this aircraft had just taken off, was turning base to final, or was in cruise at the moment control was lost? Is your link to the initial ASIAS entry somehow a refutation of witness data validation, the scientific method, or skepticism? If a witness report is deemed valid by the NTSB does that mean the organization has no duty to determine cause or that the witness statement is enough to determine cause? Your ability to collate is only surpassed by your ability to educate.

  3. Looks pretty out of control in a spin to me. Long wings and tip stalls don't mix. He was lucky to survive with the impact straight into the ground.

    1. You’re right about the stall spin, looking at the video in frame by frame that becomes clear. Comments about the CG are also spot on. This airplane looks to have a very narrow CG envelope, to an untrained pilot it could be a killer.
      Deepest condolences to this mans family, friends. Tragic.

    2. 100% agree. You can set the playback speed on both videos .25 and see the rotation.

      RIP to the pilot and condolences to his/her family

  4. I talked to a witness and the plane took almost all the runway then once airborne, corrected then spun in. Reports is the pilot did die after surgery

  5. Unlicensed pilot. Was doing high-speed runs last week without lifting off. Advised him about the importance of balance on that shortly-coupled airframe, yet it was not ascertained physically, or on paper.He walked around, lifted the Vtail up on the belly wheel...I've tried to explain C.G. location, and the wheel is NOT the C.G. .His departure stall occured a mere few hundred feet beyond the end of the runway . MAIDEN FLIGHT for an untrained pilot.

    1. Play stupid games, win stupid prizes. It is highly unfortunate he did not heed your warnings with a LOT more seriousness. 🤦‍♀️

    2. There are two many people doing this these days. A lot of them end up this way.

    3. Please be sure to talk to the NTSB so that they have this important background.

    4. If memory serves, the tail should be very light, if you would pick it up on a level surface (say 5lbs on the tailwheel, empty). A quick (crude) test of CG (no substitute obviously for proper check).

      You should also have seen a couple of heavy steel plates over the engine (1/2"x4"x8" roughly). They were needed with the KFM as it the Moni was designed for a heavier engine (which never came)

  6. Spent some time in and out of Harvey Young in the 80s. What was this fella thinking? Sad indeed.

  7. Smithsonian has one on display. Article says the 2-stroke engine was not as reliable as many pilots hoped.


  8. I've got over 300hrs in a Moni (it's been in storage for a while). The standard KFM engine was very underpowered and unfortunately saw more than a few stall spin accidents. That original engine installation had a few heavy steel plates over the engine for CG (airframe was designed in anticipation of a heavier engine). Very pitch sensitive, even with correct CG. Not a beginner's airplane.