# NTSB LAX86LA216: Stinson 108-3, N994C, Riverside, CA, May 9, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 9, 1986, 11:45 local (18:45 UTC)
- Place: Riverside, CA
- Coordinates: 33.989315, -117.439575 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.9893&lon=-117.4396&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 25157
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX86LA216
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/25157/pdf
- Page: https://openairdocs.org/ntsb/LAX86LA216

## 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
  - ground loop/swerve - inadvertent, dual student (cause)
  - rudder - inadvertent deactivation, pilot in command(cfi) (cause)
  - directional control - not corrected, pilot in command(cfi) (cause)

## Analysis

THE CFI REPORTED THAT DURING THE LANDING ROLL ON RUNWAY 24, AT FLA-BOB AIRPORT, RIVERSIDE, CA, THE AIRPLANE BEGAN TO 'DRIFT TO THE RIGHT.' THE CFI APPLIED LEFT RUDDER TO CORRECT THE EXCURSION BUT HIS LEFT FOOT SLIPPED OFF THE RUDDER BAR AND BECAME LODGED AGAINST THE BAR AND FLOOR. THE AIRPLANE CONTINUED THE RIGHT TURN AND THE LEFT WING CONTACTED THE GROUND. THE SURFACE WINDS WERE FROM THE RIGHT OF THE NOSE ABT 20 DEG AT ABOUT 7 KNOTS. THE EFFECTIVE CROSSWIND COMPONENT WAS LESS THAN 3 KNOTS. THE CFI DID NOT REPORT ANY AIRPLANE MECHANICAL MALFUNCTIONS AND/OR FAILURES.

## Aircraft

- Registration: [N994C](https://openairdocs.org/aircraft/N994C), registered now, S/N 108-3994, built 1947 (OpenAirDocs)
- Reported make and model: STINSON 108-3
- Registry model: [Universal Stinson 108-3](https://openairdocs.org/model/universal-stinson-108-3) (registry code 9230418) (OpenAirDocs)
- Registry engine: [Franklin 6A4165 series](https://openairdocs.org/engine/franklin-6a4165-series) (registry code 27025, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 108-3994
- Airframe hours: 1088
- Engines: FRANKLIN 4ACG199H3 113 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: William H. William
- Registered owner: William H. Williams
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, March 1, 1986, 1 hours before
- Departed: L66, CORONA, CA
- Airport: RIR, Fla-Bob, runway 24, 3,200 × 50 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 73; commercial, flight instructor; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: right; flight hours: 9,914 total, 27 in this make and model, 9,673 as pilot in command, 114 in the last 90 days, 40 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 260° at 7 knots
- Visibility: 6 statute miles
- Lowest ceiling: none
- Altimeter: 29.00 inHg
- Observed at: RAL, 3 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 19860509016979A](https://openairdocs.org/incident/19860509016979A), May 9, 1986: Univar 1083, Riverside, CA, Substantial damage. The aircraft groundlooped on landing when the foot of the CFI slipped off the rudder. Pedal has no side riser.

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.

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