CEN12FA170 · Mooney M20E
Niclan Mooney M20E · Accident: loss of control in flight during initial climb
From Stinson Municipal Airport (SSF) to Gillespie County Airport (T82)
Event
- NTSB case
- CEN12FA170
- 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
- 2 · all aircraft and ground
- Ground fatalities
- Unknown
- 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
Mooney M20E
- Aircraft type
- Mooney M20
- 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
- N9224M
- Operator
- Niclan
- Onboard fatalities
- Unknown
- Route
- From Stinson Municipal Airport (SSF), San Antonio, TXTo Gillespie County Airport (T82), Fredericksburg, TX
- Aircraft age
- About 46 years (built 1966)
- 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
- Initial climb
- Defining eventThe 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
- Aircraft › Aircraft oper/perf/capability
- Aircraft › Aircraft power plant
- Personnel issues › Action/decision
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
After takeoff, when the airplane was about 200 feet above ground level, the tower controller noticed the airplane in a right turn and instructed the pilot to make a left turn to the northeast. An incomplete radio call from the pilot indicated he was turning back. The controller saw the airplane flying southwest at a low altitude and shortly thereafter saw a cloud of black smoke about 1/2 mile south of the airport. Two other witnesses saw the airplane suddenly roll to the right and enter a nose-down dive, indicative of a stall. Evidence at the scene showed that the airplane impacted terrain in a nose-down attitude and came to rest inverted. There was a postimpact explosion and fire.
Based on the pilot's lack of previous experience in flying an airplane with a turbocharged engine, and the evidence of detonation found in the postaccident examination of the engine, it is likely that the pilot inadvertently overboosted the engine during takeoff and initial climb, which resulted in a partial loss of engine power. Based on the sudden change of flight direction, it is likely that the pilot became preoccupied with the partial loss of engine power and lost control of the airplane. The instructor should have been able to successfully complete an emergency off-field landing, but it does not appear that he attempted one.
This instructor had been using a series of psychotropic medications, culminating in his use of paroxetine, which would have been disqualifying for him to act as a required flight crewmember. Major depression itself is associated with significant cognitive degradation, particularly in executive functioning. While the exact degree of impairment from the instructor's incompletely controlled depression and his use of impairing medications at the time of the accident is impossible to determine, it is likely that there was some impairment in cognitive functioning as a result of his uncontrolled depression. Further, the instructor had sleep apnea, and that, combined with his recent use of sedating medications, chronic pain, and depression may well have contributed to his failure to take control of the airplane and conduct an emergency of-field landing after the partial loss of engine power.
Probable cause
The pilot's inadvertent overboost of the turbocharged engine during initial climb, which resulted in detonation and a partial loss of engine power followed by the pilot's failure to maintain airspeed and the instructor's delayed remedial action, which resulted in an aerodynamic stall. Contributing to the accident was the instructor's improper judgment in acting as a pilot with disqualifying medical conditions and while taking impairing medications.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CEN12FA170
- Event ID
- 20120226X01048
- Case number
- CEN12FA170
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
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: 84bd8506719e257f36c5ad015af3d24f9ed7b97b29797d9dcc95af58accda120; retrieved 2026-09-13T22:11:51.917Z.