# NTSB SEA91LA222: Cessna 170B, N4653C, Heber City, UT, August 26, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 26, 1991, 17:45 local (23:45 UTC)
- Place: Heber City, UT
- Coordinates: 40.43029, -111.189666 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.4303&lon=-111.1897&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report May 5, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41523
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA91LA222
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41523/pdf
- Page: https://openairdocs.org/ntsb/SEA91LA222

## Probable cause

THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL DURING LANDING GROUND ROLL.  A FACTOR RELATING TO THE ACCIDENT WAS THE CROSSWIND WEATHER CONDITIONS.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of control - on ground/water, landing - roll
  - weather condition - crosswind (contributing factor)
  - directional control - not maintained, pilot in command (cause)
- On ground/water encounter with terrain/water, landing - roll

## Analysis

THE ACFT SWERVED OFF THE RWY DURING LANDING ROLL IN X-WIND WX CONDITIONS, GROUND LOOPED, AND IMPACTED THE GROUND.

## Aircraft

- Registration: [N4653C](https://openairdocs.org/deregistered/N4653C-2013-09-16), registration cancelled 2013-09-16, S/N 25597, built 1953 (OpenAirDocs)
- Reported make and model: CESSNA 170B
- Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs)
- Registry engine: [Continental 0-300 series](https://openairdocs.org/engine/continental-0-300-series) (registry code 17022, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 17025597
- Engines: CONTINENTAL O-300-A 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Barry L. Yoseph
- Registered owner: Barry L. Yoseph
- Departed: BOI, BOISE, ID
- Airport: 36U, Heber Valley, runway 21, 4,400 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 1,806 total, 950 in this make and model, 137 in the last 90 days, 36 in the last 30 days, 8 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 13 knots
- Visibility: 30 statute miles
- Lowest ceiling: 11,000 ft broken
- Temperature: 81 °F, dew point 55 °F
- Altimeter: 29.00 inHg
- Observed at: SLC, 31 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 19910826036729A](https://openairdocs.org/incident/19910826036729A), Aug 26, 1991: Cessna 170B, Heber, UT, Substantial damage. Lost control and ground looped the tail wheel aircraft on landing.

## Other investigations on N4653C (2)

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 SEA00LA058](https://openairdocs.org/ntsb/SEA00LA058), Mar 28, 2000: Cessna 170B (N4653C), Lopez Island, WA, substantial damage. Probable cause: The pilot's failure to maintain aircraft control during landing. Contributing factors were the crosswind condition, gusts, and the pilot's overall lack of total (flight and tail wheel) experience.
- [NTSB FTW84LA397](https://openairdocs.org/ntsb/FTW84LA397), Sep 15, 1984: Cessna 170B (N4653C), Flatonia, TX, 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.