# NTSB MIA91LA103: Cessna 150L, N10629, Miami, FL, March 19, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 19, 1991, 08:05 local (13:05 UTC)
- Place: Miami, FL
- Coordinates: 25.740156, -80.309425 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=25.7402&lon=-80.3094&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report January 25, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 32835
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA91LA103
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/32835/pdf
- Page: https://openairdocs.org/ntsb/MIA91LA103

## Probable cause

TOTAL LOSS OF ENGINE POWER DUE TO INADVERTENT USE OF THE MIXTURE CONTROL BY THE STUDENT, INADEQUATE SUPERVISION BY THE CFI, AND DELAYED REMEDIAL ACTION BY THE CFI RESULTING IN THE OFF AIRPORT LANDING.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(total) - nonmechanical, maneuvering
  - mixture - inadvertent use, dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (cause)
  - remedial action - delayed, pilot in command(cfi) (cause)
- Forced landing, descent - emergency
- In flight collision with terrain/water, landing
  - terrain condition - high vegetation
  - terrain condition - ground

## Analysis

THE CFI PULLED THE THROTTLE TO IDLE TO SIMULATE AN ENG FAILURE BUT DURING THE EMERGENCY PROCEDURES, THE STUDENT PULLED THE MIXTURE TO THE IDLE CUTOFF POSITION.  THE CFI DID NOT NOTICE THIS UNTIL THE ENG DID NOT RESPOND WHEN THE STUDENT APPLIED THE THROTTLE TO GO-AROUND.  AT THAT TIME THE ACFT WAS JUST ABOVE SAWGRASS & THE CFI PUSHED THE MIXTURE TO THE FULL RICH POSITION & THE ENG DID START BUT NOT BEFORE THE MAIN LANDING GEAR CONTACTED THE SAWGRASS.

## Aircraft

- Registration: [N10629](https://openairdocs.org/deregistered/N10629-1995-06-14), registration cancelled 1995-06-14, S/N 15074933 (OpenAirDocs)
- Reported make and model: CESSNA 150L
- Registry model: [Cessna 150L](https://openairdocs.org/model/cessna-150l) (registry code 2071826) (OpenAirDocs)
- Category: Airplane
- Serial number: 15074933
- Engines: CONTINENTAL O-200A 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Adf Airways, Inc.
- Registered owner: Silver Express Avn Co.
- Departed: TMB, MIAMI, FL

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 23; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 315 total, 26 in this make and model, 260 as pilot in command, 18 in the last 90 days, 18 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 315° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point -0 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19910319006109A](https://openairdocs.org/incident/19910319006109A), Mar 19, 1991: Cessna 150L, Miami, FL, Substantial damage. CFI throttled back for sfl. Student pulled mixture to idle cut off. CFI failed notice. Landed in saw grass.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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