# NTSB DEN87LA241: Cessna TU206G, N756HD, Spanish Fork, UT, September 16, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 16, 1987, 11:20 local (17:20 UTC)
- Place: Spanish Fork, UT
- Coordinates: 40.020587, -111.550743 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.0206&lon=-111.5507&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 2, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 17312
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN87LA241
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17312/pdf
- Page: https://openairdocs.org/ntsb/DEN87LA241

## 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 - normal
  - engine assembly,piston - failure,total (cause)
- Forced landing, descent - emergency
  - terrain condition - none suitable (contributing factor)
- Loss of control - in flight, maneuvering
  - object - vehicle (contributing factor)
  - object - wire,transmission (contributing factor)
  - maneuver - initiated
  - airspeed - inadequate
  - stall - inadvertent
- In flight collision with terrain/water, landing

## Analysis

WHILE CRUISING AT 10,500 FT WITH THE POWER SET AT 28 INCHES MAP & 2350 RPM, THE ENG SUDDENLY LOST PWR & BEGAN KNOCKING. THE PLT NOTED A RAPID DROP IN OIL PRESSURE & SAW A 3-INCH HOLE IN THE TOP OF THE ENG COWLING. HE ATTEMPTED TO LAND ON A HIGHWAY, BUT WAS UNABLE DUE TO VEHICULAR TRAFFIC, SO HE CHANGED HIS APCH TO LAND BESIDE THE ROADWAY. JUST BFR LANDING, HE SAW POWERLINES & PULLED UP TO AVOID A COLLISION. THE ACFT THEN ENTERED A HIGH SINK RATE (STALLED). THE PILOT STATED THE ACFT 'IMPACTED THE GROUND IN A FLAT, RATHER NOSE LOW ATTITUDE.'  THE ACFT BEGAN BURNING IMMEDIATELY AFTER IMPACT, BUT THE PLT EXITED THE PLANE WITHOUT INJURY. A TEARDOWN OF THE ENG REVEALED A CATASTROPHIC FAILURE OF THE #2 PISTON AND WRIST PIN, BUT THE INVESTIGATION DID NOT DETERMINE WHICH HAD FAILED 1ST. THE ENGINE HAD BEEN OVERHAULED ON 6/5/84, USINGSEVERAL COMPONENTS (INCLUDING PISTONS & PISTON PINS) MANUFACTURED BY SUPERIOR AIR PARTS, INC. ACCORDING TO MAINTENANCE LOGS, THE ACFT HAD FLOWN 1045 HRS SINCE MAJOR OVERHAUL OF THE ENG.

## Aircraft

- Registration: [N756HD](https://openairdocs.org/deregistered/N756HD-1989-10-25), registration cancelled 1989-10-25, S/N U20604096 (OpenAirDocs)
- Reported make and model: CESSNA TU206G
- Registry model: [Cessna TU206G](https://openairdocs.org/model/cessna-tu206g) (registry code 2073357) (OpenAirDocs)
- Category: Airplane
- Serial number: U20604096
- Airframe hours: 3276
- Engines: CONTINENTAL TSIO-520-M 310 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Positioning, Part 91
- Operator: Scenic Aviation
- Registered owner: Scienic Aviation
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 3, 1987, 344 hours before
- Departed: BDG, BLANDING, UT
- Destination: SLC, SALT LAKE CITY, UT
- Flight plan: Company VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 24; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 1,800 total, 353 in this make and model, 1,690 as pilot in command, 370 in the last 90 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 340° at 15 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 66 °F, dew point 36 °F
- Altimeter: 30.00 inHg
- Observed at: SLC, 57 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 19870916053399A](https://openairdocs.org/incident/19870916053399A), Sep 16, 1987: Cessna TU206G, Spanish Fork, UT, Destroyed. Piston or piston pin failed. Knocked hole in engine case. Stalled clearing powerlines on landing. Crashed and burned

## Other investigations on N756HD (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 DEN8UDA004](https://openairdocs.org/ntsb/DEN8UDA004), Oct 8, 1980: Cessna TU206G (N756HD), Moab, UT, 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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.