# NTSB MKC90LA037: Saint Louis YPT-15, N106SC, Creve Coeur, MO, November 30, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: November 30, 1989, 16:20 local (22:20 UTC)
- Place: Creve Coeur, MO
- Coordinates: 38.660316, -90.459007 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.6603&lon=-90.4590&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 24, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 34918
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC90LA037
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34918/pdf
- Page: https://openairdocs.org/ntsb/MKC90LA037

## Probable cause

THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL OF THE AIRPLANE. CONTRIBUITING TO THE ACCIDENT WAS THE SUN GLARE.

## 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
  - light condition - sunglare (contributing factor)
  - visual lookout - restricted, pilot in command
  - directional control - not maintained, pilot in command (cause)
- On ground/water encounter with terrain/water, landing - roll
- Nose down, landing - roll

## Analysis

THE PILOT SAID THAT HE LOST DIRECTIONAL CONTROL DURING THE LANDING ROLL AND GROUND LOOPED THE TAIL WHEEL CONFIGURED BI-PLANE. THE LEFT WING DUG INTO THE GROUND AND THE AIRCRAFT CAME TO REST, NOSE DOWN. THE PILOT SAID THAT HE WAS LANDING DIRECTLY INTO THE SUN AND MAY HAVE HAD VISUAL PROBLEMS.

## Aircraft

- Registration: [N106SC](https://openairdocs.org/aircraft/N106SC), registered now, S/N 106, built 1940 (OpenAirDocs)
- Reported make and model: SAINT LOUIS YPT-15
- Registry model: [Saint Louis YPT-15](https://openairdocs.org/model/saint-louis-ypt-15) (registry code 7920302) (OpenAirDocs)
- Registry engine: [Wright 760A B D E&ET](https://openairdocs.org/engine/wright-760a-b-d-e-et) (registry code 67009, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 106
- Engines: WRIGHT R-975-32 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Shaver, Michael D.
- Registered owner: Unknown
- Airport: 1H0, Creve Coeur, runway 25, 3,020 × 175 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 43; private; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; flight hours: 271 total, 12 in this make and model, 217 as pilot in command, 23 in the last 90 days, 7 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 260° at 7 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °F
- Observed at: SUS, 8 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 19891130047809A](https://openairdocs.org/incident/19891130047809A), Nov 30, 1989: Stlous YPT15, St Louis, MO, Substantial damage. Ground looped after landing. Stated sun obscured his vision.

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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