FTW99LA087 · Monocoupe Aircraft 90A
Monocoupe Aircraft 90A · Accident: loss of control on ground/water during landing
From T67 to an unrecorded destination
Event
- NTSB case
- FTW99LA087
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- 0
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Monocoupe Aircraft 90A
- Aircraft type
- Monocoupe 90
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N11760
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From T67To not recorded
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Landing · landing roll
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Loss of control on ground/water
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Pilot in command › Directional control, not maintained
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
During the landing roll on runway 14, the right wing of the tailwheel-equipped airplane lifted, and the right main landing gear came off the ground. The airline transport rated pilot reported that the application of full right aileron had no effect 'due to calm winds and aircraft being slowed down.' The pilot stated that the aircraft 'never departed heading.' However, damage to the airplane and skid marks and scrapes on the runway indicated the airplane swerved to the right, the left main landing gear folded under the fuselage, and the left wing contacted the ground. The pilot reported the winds were calm. Recorded winds 30 minutes before the accident were from 230 degrees at 7 to 9 knots (right crosswind). Recorded winds 30 minutes after the accident were calm to variable at 4 knots.
Probable cause
The pilot's failure to maintain directional control during the landing roll, which resulted in an inadvertent ground loop/swerve. A factor was the crosswind.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record FTW99LA087
- Event ID
- 20001205X00170
- Case number
- FTW99LA087
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: ce9fe52968826511562231fa2e14a568948f8cbf63c7c38f661ec3bdc6cdb42f; retrieved 2026-09-22T15:47:12.485Z.