# NTSB SEA93LA124: Cessna A185F, N2215T, Bellevue, WA, May 27, 1993

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 26, 1993, 18:30 local (May 27, 1993, 01:30 UTC)
- Place: Bellevue, WA
- Coordinates: 47.55001, -122.139129 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.5500&lon=-122.1391&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report September 15, 1994
- Report: Approved by Office Director
- NTSB case key (mKey): 41714
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA93LA124
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41714/pdf
- Page: https://openairdocs.org/ntsb/SEA93LA124

## Probable cause

FAILURE OF THE RIGHT MAIN LANDING GEAR SHOCK STRUT.

## Sequence of events

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

- Gear not retracted, landing - roll
  - landing gear,main gear strut - failure,partial (cause)
- Nose over, landing - roll
  - terrain condition - water

## Analysis

PRIOR TO LANDING THE AMPHIBIAN AIRPLANE ON THE LAKE, THE PILOT CONFIRMED BY THE COCKPIT GEAR LIGHTS AND BY VISUAL INDICATIONS ON THE TOP OF THE FLOATS, THAT THE LANDING GEAR WAS IN THE UP-AND-LOCKED POSITION. AFTER THE AIRPLANE TOUCHED DOWN, IT VEERED TO THE RIGHT. THE PILOT APPLIED FULL LEFT RUDDER; HOWEVER, THE RIGHT WING CONTACTED THE WATER SURFACE AND THE AIRPLANE NOSED OVER. WITNESSES REPORTED THAT THEY OBSERVED THAT THE RIGHT MAIN LANDING GEAR WAS EXTENDED, WHILE THE LEFT MAIN AND THE NOSE GEAR WERE RETRACTED. A METALLURGICAL EXAMINATION OF THE RIGHT MAIN LANDING GEAR STRUT REVEALED THAT THE SCREWS THAT ATTACH THE CASING TO THE PISTON BROKE DUE TO OVERSTRESS UNDER DIRECT SHEAR LOADS.

## Factual narrative

On May 26, 1993, at 1830 hours Pacific daylight time, an amphibian Cessna A185F, N2215T, nosed over during landing on Lake Washington, Bellevue, Washington.  Visual meteorological conditions prevailed at the time and no flight plan was filed.  The airplane was substantially damaged and the certificated airline transport pilot and his three passengers were not injured.  The flight had originated from Stuart Island, Washington, on May 26, 1993, at 1800 hours, and was en route to Bellevue.

The pilot reported that he had cockpit indications, and visual indications on the floats that the landing gear was in the up and locked position for the landing on the water.  After touch down, the airplane veered to the right.  The pilot applied full left rudder, however, the right wing tip contacted the water and the airplane nosed over.

Witnesses located on the shore reported that they observed that the right main landing gear was extended, while the left main and nose gear were retracted.

After the airplane was retrieved, it was found that the two screws that attach the casing to the piston at the top of the right main gear shock strut were broken.  A metallurgical examination of the two screws revealed that, "Examination with the aid of a low power binocular microscope (up to 50X) revealed that both breaks had features typical of over stress separation under direct shear loads."  The top edges of the screw holes in the shock strut casing revealed fresh rub marks.

## Aircraft

- Registration: [N2215T](https://openairdocs.org/aircraft/N2215T), registered now, S/N 185-1367, built 1968 (OpenAirDocs)
- Reported make and model: CESSNA A185F
- Registry model: [Cessna A185E](https://openairdocs.org/model/cessna-a185e) (registry code 2072818) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 185-1367
- Airframe hours: 2656
- Engines: CONTINENTAL IO-520-D 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Lofgren, Loren R.
- Registered owner: Lofgren, Loren R.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 14, 1992, 30 hours before
- Departed: STUART ISLAND, WA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 47; airline transport, commercial; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 15,500 total, 900 in this make and model, 11,500 as pilot in command, 80 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 7 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 70 °F

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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