# Accident 20180811010949A: Kemnitzer Stephen R ZENITH STOL CH750, Napa, CA, August 11, 2018

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: August 11, 2018, 10:56 local time
- Place: Napa, CA
- Airport: Napa
- Damage: Substantial damage
- Phase of flight: Maneuver
- Operating rules: General operating rules (Part 91)
- Location: 38.2000° N, 122.2917° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=38.2000&lon=-122.2917&mi=10
- Aircraft: N328SK, a cancelled registration (https://openairdocs.org/deregistered/N328SK-2019-12-23) (OpenAirDocs)
- Registry model: Kemnitzer Stephen R ZENITH STOL CH750 (registry code 05633NS, https://openairdocs.org/model/kemnitzer-stephen-r-zenith-stol-ch750) (OpenAirDocs)
- Registry engine: Ulpower UL350IS (registry code 62000, https://openairdocs.org/engine/ulpower-ul350is) (OpenAirDocs)
- Reported make and model: KEMNITZER STEPHEN R ZENITH STOL CH750
- Reported engine: ULPOWER 350IS
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Commercial pilot
- Pilot flight hours: 7,500 total, 200 in this make and model, 15 in the last 90 days
- NTSB investigation: [NTSB WPR18TA223](https://openairdocs.org/ntsb/WPR18TA223) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20180811010949A

## Narrative

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

PILOT REPORTED LOSS OF OIL PRESSURE TO ATC AT 1750Z. PILOT CONTACTED ATC AT 1755Z AND CIC DECLARED AN EMERGENCY. PILOT REPORTED ENGINE LOSS AND LANDED ON TOP OF A LEVEE ON THE NAPA RIVER, WEST OF KAPC WITH, ALEGEDLY, ONE OTHER PERSON ON BOARD. NO REPORTED INJURIES.

## 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 WPR18TA223](https://openairdocs.org/ntsb/WPR18TA223), Aug 11, 2018: Zenair Zenith Stol CH750 (N328SK), Napa, CA, substantial damage. Probable cause: The pilot's use of fuel below the required octane rating, which caused engine detonation and damage and subsequently led to oil exhaustion and a total loss of engine power in flight. Contributing to…

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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