# NTSB MIA90LA157: Boeing B75N1, N4429N, Plant City, FL, July 21, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 21, 1990, 10:40 local (14:40 UTC)
- Place: Plant City, FL
- Coordinates: 27.980068, -82.099128 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=27.9801&lon=-82.0991&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 15, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 32684
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA90LA157
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/32684/pdf
- Page: https://openairdocs.org/ntsb/MIA90LA157

## Probable cause

ENGINE FAILURE FOR UNDETERMINED REASONS RESULTING IN THE FORCED LANDING.

## Sequence of events

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

- Loss of engine power, takeoff - initial climb
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
- On ground/water collision with object, landing - roll
  - object - fence
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - ditch

## Analysis

THE ACFT HAD BEEN FLOWN FOR ABOUT 20 MINUTES PRIOR TO THE ACCIDENT FLT WITH NO PROBLEM. WITH ABOUT 20 GALS OF FUEL ABOARD, THE PLT PREFLIGHTED THE ACFT FOR THE NEXT FLT BUT DID NOT CHECK THE FUEL SYSTEM FOR CONTAMINANTS. THE ENG RUN-UP PRIOR TO DEPARTURE WAS NORMAL. SHORTLY AFTER TAKEOFF AT AN ALT OF ABOUT 300 FT, AFTER THE INITIAL POWER REDUCTION, THE ENG QUIT. UNABLE TO RETURN TO THE ARPT, THE PLT LANDED THE ACFT IN A FIELD, DURING WHICH, IT COLLIDED WITH A FENCE & DITCH. THE COLLISION WITH THE DITCH COLLAPSED THE LANDING GEAR. EXAM OF THE ENG REVEALED NO EVIDENCE OF CATASTROPHIC FAILURE OR MALFUNCTION. THE FUEL WAS TESTED FOR CONTAMINANTS. NONE WERE FOUND. NO FURTHER EXAM WAS CONDUCTED; THEREFORE, NO DETERMINATION COULD BE MADE AS TO THE REASON FOR THE LOSS OF ENG POWER.

## Aircraft

- Registration: [N4429N](https://openairdocs.org/aircraft/N4429N), registered now, S/N 75-6635, built 1941 (OpenAirDocs)
- Reported make and model: BOEING B75N1
- Registry model: [Boeing B75N1](https://openairdocs.org/model/boeing-b75n1) (registry code 1380144) (OpenAirDocs)
- Registry engine: [Continental W670 series](https://openairdocs.org/engine/continental-w670-series) (registry code 17018, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 75-6635
- Airframe hours: 2435
- Engines: CONTINENTAL W-670-6A 220 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: J. Mcmurtry & C. Cunningham
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, July 1, 1990, 5 hours before
- Airport: X17, Plant City Municipal, runway 9, 3,350 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 58; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: rear; flight hours: 7,057 total, 55 in this make and model, 6,627 as pilot in command, 16 in the last 90 days, 5 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 130° at 8 knots
- Visibility: 15 statute miles
- Lowest ceiling: 30,000 ft broken
- Temperature: 86 °F, dew point 73 °F
- Altimeter: 30.00 inHg
- Observed at: LAL, 8 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 19900721030769A](https://openairdocs.org/incident/19900721030769A), Jul 21, 1990: Boeing B75N1, Plant City, FL, Substantial damage. Engine quit on takeoff climb. Landed off airport, struck a fence and a ditch. Cause of power loss unknown.

## Other investigations on N4429N (1)

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.

- [NTSB MKC76FCA21](https://openairdocs.org/ntsb/MKC76FCA21), Apr 24, 1976: Boeing B75N1 (N4429N), St Charles, MO, substantial damage

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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