FTW91FA072 · Cessna 182A
Sky Dive San Marcos Cessna 182A · Accident: loss of control in flight en route
Event
- NTSB case
- FTW91FA072
- 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
Cessna 182A
- Aircraft type
- Cessna 182
- 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
- N6172B
- Operator
- Sky Dive San Marcos
- Onboard fatalities
- Unknown
- Route
- From not recordedTo 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
- En route · descent
- 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 in flight
- 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
- Door › Flutter
- Door, interior crew › Separation
- Window, flight compartment window/windshield › Separation
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
SUBSEQUENT TO THE DEPARTURE OF THE SKYDIVERS, THE AIRPLANE ENTERED A SPIRAL DESCENT. THE JUMP DOOR, NOT THE SKY MOTIVE JUMP DOOR LISTED ON THE AIRPLANE'S FORM 337, WHICH HAD BEEN APPROVED BY AN FAA INSPECTOR, ENTERED A FLUTTER CONDITION. THE PILOT DOOR, WINDSHIELD AND PILOT DOOR WINDOW SEPARATED DURING THE DESCENT. THIS FLUTTER CONDITION AND SEPARATION OF COMPONENTS RESULTED IN THE PILOT BEING UNABLE TO CONTROL THE AIRPLANE. IMPACT OCCURRED IN A 20 TO 30 DEGREE NOSE LOW ATTITUDE IN APPROXIMATELY A 65 DEGREE LEFT ANGLE OF BANK.
Probable cause
THE IMPROPER MAJOR MODIFICATION OF THE AIRPLANE BY THE OPERATOR, AND THE RESULTANT SEPARATION OF THE DOOR, WINDOW AND WINDSHIELD. A FACTOR WAS THE INSTALLATION OF A NON APPROVED JUMP DOOR.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record FTW91FA072
- Event ID
- 20001212X16999
- Case number
- FTW91FA072
- 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: 0c1de7dad23ef9a0549640c26019cad6da841edacedeae57d8225fff07818fb7; retrieved 2026-09-21T15:28:12.319Z.