# NTSB MIA86LA174: Randy Tredo Mustang II, N78RT, Ocala, FL, June 8, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 8, 1986, 13:10 local (17:10 UTC)
- Place: Ocala, FL
- Location: 29.1872° N, 82.1401° W: Placed by OpenAirDocs: center of Ocala, FL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=29.1872&lon=-82.1401&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 31648
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA86LA174
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/31648/pdf
- Page: https://openairdocs.org/ntsb/MIA86LA174

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, takeoff - initial climb
  - fuel system,carburetor - blocked(total) (cause)
  - carburetor heat control,torque box - failure,total (cause)
- Forced landing, descent - emergency
- Gear collapsed, landing - roll

## Analysis

THE PLT STATED THAT JUST AFTER TAKEOFF HE LOST ALL ENGINE POWER AND UPON LANDING IN AN OPEN FIELD THE GEAR COLLAPSED. EXAMINATION OF THE ENG REVEALED THAT THE BUTTERFLY VALVE IN THE CARBURETOR HEAT BOX BROKE OFF AND SLID BACK INTO THE CARBURETOR OPENING AND BLOCKED THE AIRFLOW, CAUSING THE COMPLETE LOSS OF POWER EXPERIENCED BY THE PILOT.

## Aircraft

- Registration: [N78RT](https://openairdocs.org/aircraft/N78RT), registered now, S/N 885, built 1983 (OpenAirDocs)
- Reported make and model: RANDY TREDO MUSTANG II
- Registry model: [Tredo Randy MUSTANG II](https://openairdocs.org/model/tredo-randy-mustang-ii) (registry code 1690465) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 885
- Airframe hours: 214
- Engines: LYCOMING O-320-A1A 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Robert Murty, Jr
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, May 14, 1986
- Departed: OCF, OCALA, FL
- Destination: OPF, OPA LOCKA, FL
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; private; airplane ratings: single-engine land; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 203 total, 120 in this make and model, 141 as pilot in command, 43 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 280° at 6 knots
- Visibility: 10 statute miles
- Lowest ceiling: 25,000 ft broken
- Temperature: 91 °F, dew point 72 °F
- Altimeter: 29.00 inHg
- Observed at: GNV, 30 nm away

## 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 19860608022159A](https://openairdocs.org/incident/19860608022159A), Jun 8, 1986: Amtrbb MUSTANG2, Ocala, FL, Substantial damage. Engine quit after takeoff. Collapsed gear on forced landing. Butterfly valve in carb heat box broke off blocked air.

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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