# Accident 19910704025719A: Amtrvn VANSRV4, Yellowstone Par, WY, July 4, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 4, 1991, 09:00 local time
- Place: Yellowstone Par, WY
- Airport: Shoshone Lake
- Damage: Substantial damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 44.5704° N, 110.5098° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=44.5704&lon=-110.5098&mi=10
- Aircraft: N44AZ (not matched to a registry record)
- Reported make and model: AMTRVN VANSRV4
- Reported engine: LYC IO320*
- People aboard: 1
- Fatal injuries: 1
- Pilot flight hours: 450 total
- NTSB investigation: [NTSB SEA91LA154](https://openairdocs.org/ntsb/SEA91LA154) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19910704025719A

## Narrative

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

TRYING TO LAND ON SHORE,LOST POWER, STALLED, AND IMPACTED SHALLOW LAKE WATER.SCAT AIR INTAKE LINE PINCHED,COLLAPSED

## 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 SEA91LA154](https://openairdocs.org/ntsb/SEA91LA154), Jul 4, 1991: Jerrell RV-4 (N44AZ), Yellowstonepark, WY, substantial damage, 1 fatal. Probable cause: A COLLAPSED INDUCTION AIR DUCT. FACTORS INCLUDE INADEQUATE DESIGN BY THE MANUFACTURER/BUILDER, AND A MISJUDGED RATE OF DESCENT BY THE PILOT.

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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