# NTSB SEA83LA177: Cessna 185E, N4772Q, Boise, ID, August 14, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 13, 1983, 18:34 local (Aug 14, 1983, 00:34 UTC)
- Place: Boise, ID
- Location: 43.5644° N, 116.2229° W: Placed by OpenAirDocs at BOISE AIR TRML/GOWEN FLD (BOI), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.5644&lon=-116.2229&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39754
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA83LA177
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39754/pdf
- Page: https://openairdocs.org/ntsb/SEA83LA177

## Sequence of events

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

- Loss of control - in flight, landing - flare/touchdown
  - weather condition - crosswind (contributing factor)
  - flare - misjudged, pilot in command (cause)
  - ground loop/swerve - performed, pilot in command (cause)
  - brakes(normal) - excessive, pilot in command (cause)
- Main gear collapsed, landing - roll
  - landing gear,main gear - separation (contributing factor)
  - landing gear,main gear strut - failure,total (contributing factor)
  - landing gear,main gear - overload (contributing factor)
  - landing gear,main gear strut - overload (contributing factor)

## Analysis

THE ACFT LANDED IN A NEAR MAXIMUM VELOCITY CROSSWIND AND WHILE BRAKING TO CONTROL/CORRECT A SWERVE, THE RIGHT MAIN LANDING GEAR SEPARATED FROM THE ACFT. THE LANDING WAS ON RWY 28R AND THE WIND WAS FROM 200 DEGREES AT 10 TO 14 KTS ON FINAL AND 12 KTS WHEN THE PILOT WAS OVER THE THRESHOLD. THE ACFT TOUCHED DOWN ON THE LEFT WHEEL AND BOUNCED A LITTLE. ITTOUCHED DOWN AGAIN ON THE LEFT GEAR AND THE PILOT RAISED THE TAIL. THE RIGHT MAIN CAME DOWN WITH THE TAIL STILL IN THE AIR. AT ABOUT 4O MPH THE TAIL WAS LOWERED AND THE ACFT STARTED A LEFT TURN. THE PILOT CORRECTED WITH FULL RUDDER AND RIGHT BRAKING. THE PILOT DETECTED A SINKING ON THE RIGHT SIDE AND THEN THE RIGHT STRUT COLLAPSED. WHEN HE DEPLANED THE PILOT DISCOVERED THE RIGHT GEAR HAD SEPARATED. THE MAXIMUM DEMONSTRATED CROSSWIND VELOCITY FOR THIS AIRCRAFT (CESSNA 185) IS 15 KTS. METALLURGICAL TESTS WERE PERFORMED ON THE RIGHT WHEEL SPINDLE ATTACHING NUTS AND BOLTS WHICH SHOWED THAT THE REAR BOLTS FAILED AT THE INTERFACE OF SPINDLE AND STRUT DUE TO TENSILE OVERLOAD.

## Aircraft

- Registration: [N4772Q](https://openairdocs.org/aircraft/N4772Q), registered now, S/N 185-1239, built 1967 (OpenAirDocs)
- Reported make and model: CESSNA 185E
- 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: 185-1239
- Engines: CONTINENTAL O-470-R 230 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Operator: Salmon Air Taxi
- Registered owner: Mountain Bird, Incorporated
- Airworthiness certificate: Standard, Normal
- Departed: MYL, MCCALL, ID
- Destination: BOI, BOISE, ID
- Flight plan: Company VFR
- Airport: BOI, Boise Air Terminal, runway 28R, 7,400 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 30; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 1,164 total, 55 in this make and model, 987 as pilot in command, 30 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 200° at 15 knots
- Visibility: 20 statute miles
- Lowest ceiling: 14,000 ft broken
- Temperature: 82 °F, dew point 48 °F
- Altimeter: 30.00 inHg
- Observed at: BOI

## 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 19830813041119A](https://openairdocs.org/incident/19830813041119A), Aug 13, 1983: Cessna A185E, Boise, ID, Substantial damage. Right wheel came off during a crosswind landing and collapsed the strut. Failure due to tensile overload.

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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