# NTSB FTW92FA152: Siai-Marchetti SF260B, N22FD, Decatur, TX, June 7, 1992

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: June 7, 1992, 12:55 local (17:55 UTC)
- Place: Decatur, TX
- Coordinates: 33.229663, -97.58921 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.2297&lon=-97.5892&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report June 30, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 18361
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW92FA152
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18361/pdf
- Page: https://openairdocs.org/ntsb/FTW92FA152

## Probable cause

THE LOSS OF ENGINE POWER AS THE RESULT OF THE FAILURE OF THE ENGINE OIL PUMP. FACTORS WERE NON COMPLIANCE WITH A SERVICE BULLETIN, THE LACK OF SUITABLE TERRAIN, AND INADVERTENT STALL.

## 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, cruise
  - lubricating system,oil pressure pump - failure,total (cause)
  - maintenance,service bulletin/letter - not performed, other maintenance personnel (contributing factor)
  - engine assembly,connecting rod cap - separation
  - engine assembly,crankcase - cracked
- Forced landing, descent - emergency
- In flight collision with terrain/water, landing
  - terrain condition - none suitable (contributing factor)
  - stall - inadvertent, pilot in command (contributing factor)
- Fire/explosion, other

## Analysis

AN ITALIAN BUILT MILITARY TRAINER EXPERIENCED A CATASTROPHIC ENGINE FAILURE DURING A DEMONSTRATION FLIGHT FOR A PROSPECTIVE BUYER. THE ENGINE FAILURE WAS THE RESULT OF THE FAILURE OF THE ENGINE OIL PUMP SHAFT. WHILE ATTEMPTING A FORCED LANDING TO A TWO LANE HIGHWAY, A HIGH RATE OF DESCENT DEVELOPED DURING AN INADVERTENT STALL AND THE AIRPLANE IMPACTED AN EMBANKMENT ON THE SHOULDER OF THE ROAD, EXPLODED AND BURNED. A 1975 SERVICE BULLETIN RECOMMENDED REPLACEMENT OF THE FAILED SHAFT WITH AN IMPROVED SHAFT.

## Aircraft

- Registration: [N22FD](https://openairdocs.org/deregistered/N22FD-2014-12-02), registration cancelled 2014-12-02, S/N 17-01, built 1974 (OpenAirDocs)
- Reported make and model: SIAI-MARCHETTI SF260B
- Registry model: [Siai-Marchetti SF260](https://openairdocs.org/model/siai-marchetti-sf260) (registry code 8121208) (OpenAirDocs)
- Registry engine: [Lycoming 0-540 series](https://openairdocs.org/engine/lycoming-0-540-series) (registry code 41532, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 17-01
- Engines: LYCOMING O-540-E4A5 260 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Personal, Part 91
- Operator: Homer F. Woodard
- Registered owner: Homer F. Woodard
- Airworthiness certificate: Standard, Utility; Standard, Aerobatic
- Last inspection: Annual, January 2, 2000
- Departed: T67, FORT WORTH, TX
- Destination: T67

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 62; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: right; toxicology performed; flight hours: 4,000 total, 300 in this make and model, 75 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 80° at 8 knots
- Visibility: 10 statute miles
- Lowest ceiling: 2,800 ft broken
- Temperature: 82 °F, dew point 68 °F
- Altimeter: 29.00 inHg
- Observed at: FTW, 40 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 19920607025649A](https://openairdocs.org/incident/19920607025649A), Jun 7, 1992: Mrchti SF260, Decatur, TX, Destroyed, 2 fatal. Lost power on demo flight. Crash trying for highway. Oil pump woodruff worn down. Stopped pump. Starved engine of oil

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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