# Accident 20110730016639A: Weatherly Aviation Co Inc 620B, Hettinger, ND, July 30, 2011

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 30, 2011, 10:00 local time
- Place: Hettinger, ND
- Airport: Hettinger
- Damage: Substantial damage
- Phase of flight: Cruise/Level Flight
- Operating rules: Agricultural (Part 137)
- Operator: CTVG
- Location: 46.0156° N, 102.6556° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=46.0156&lon=-102.6556&mi=10
- Aircraft: N90181, registered now (https://openairdocs.org/aircraft/N90181) (OpenAirDocs)
- Registry model: Weatherly 620B (registry code 9630605, https://openairdocs.org/model/weatherly-620b) (OpenAirDocs)
- Registry engine: Amateur-built UNKNOWN ENG (registry code 99999, https://openairdocs.org/engine/amateur-built-unknown-eng) (OpenAirDocs)
- Reported make and model: WEATHERLY AVIATION CO INC 620B
- Reported engine: PRATT & WHITNEY R-985
- People aboard: 1
- Fatal injuries: 0
- Other injuries: 0
- NTSB investigation: [NTSB CEN11LA541](https://openairdocs.org/ntsb/CEN11LA541) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20110730016639A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

AIRACRAT INVOLVED IN ARIAL SPRAY OPERATIONS WHEN ENGINE TOP CYLINDER BARREL SEPERATED FROM THE HEAD AND CAUSED OIL TO BLOW BACK ON WINDSCREEEN, FORCING PILOT TO LAND ON MINIMUAL USE GRAVEL ROAD.  SOFT GRAVEL PULLED AIRCRAFT INTO DITCH AND CAUSED SUBSTATIONAL AIRCRAFT DAMAGE.WHILE OVERSEENING ENGINE REMOVAL FOR NTSB, A MORE EXTENSIVE INSPECTION OF THE ENGINE REVEALED THAT THE # 1 CYLINDER PISTON HAD TRAVEL BEYOUND THE CYLINDER BORE AND HAD CAUSED THE CYLINDER HEAD TO BREAK OFF.  REMOVING THE REMAINING CYLINDER HEAD PARTS FOR SHIPPMENT THE PISTON WAS ALSO REMOVED FROM THE CYLINDER REVEALING THAT THE CONNECTING ROD WAS BROKEN JUST ABOVE THE BEARING  AREA.  LOOKING DOWN IN THE ENGINE SHOWED MANY CONNECTING RODS BROKEN.

## The NTSB's investigation of this event (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 CEN11LA541](https://openairdocs.org/ntsb/CEN11LA541), Jul 30, 2011: Weatherly 620B (N90181), Hettinger, ND, substantial damage. Probable cause: Internal failure of the engine for undetermined reasons.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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