# NTSB ANC91LA106: Cessna 206, N8295Q, Cube Cove, AK, July 24, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 24, 1991, 12:00 local (20:00 UTC)
- Place: Cube Cove, AK
- Location: 57.9350° N, 134.7111° W: Placed by OpenAirDocs: center of Cube Cove, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=57.9350&lon=-134.7111&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 27, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5585
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC91LA106
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5585/pdf
- Page: https://openairdocs.org/ntsb/ANC91LA106

## Probable cause

A COMPLETE FAILURE OF THE BRAKE SYSTEM DUE TO A CRACK IN THE BRAKE LINES. CONTRIBUTING TO THE ACCIDENT WAS THAT THE BRAKES WERE NOT ADEQUATELY MAINTAINED BY COMPANY MAINTENANCE PERSONNEL.

## 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
  - landing gear,normal brake system - failure,total (cause)
  - brakes(normal) - not maintained, company maintenance personnel (contributing factor)
  - landing gear,normal brake system - cracked (cause)
- Nose over, landing - roll

## Analysis

DURING THE LANDING ROLL, THE PILOT APPLIED FULL BRAKES.  THE PILOT THEN LOST DIRECTIONAL CONTROL AND THE AIRPLANE NOSED OVER ON ITS BACK. EXAMINATION OF THE BRAKE SYSTEM REVEALED A STRESS CRACK UNDER THE SLEEVE WHICH CAUSED A COMPLETE LOSS OF BRAKE FLUID WHEN THE BRAKES WERE APPLIED BY THE PILOT.

## Aircraft

- Registration: N8295Q (not matched to a registry record)
- Reported make and model: CESSNA 206
- Category: Airplane
- Serial number: U20603156
- Airframe hours: 4716
- Engines: CONTINENTAL IO-520-F 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: Silver Bay Logging
- Registered owner: Silver Bay Logging
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, July 17, 1991, 14 hours before
- Departed: CORNER BAY, AK
- Flight plan: Company VFR
- Airport: CVW, Cube Cove, runway 18, 1,600 × 50 ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; commercial; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; flight hours: 2,160 total, 2,000 in this make and model, 2,060 as pilot in command, 77 in the last 90 days, 15 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 8 knots
- Visibility: 20 statute miles
- Lowest ceiling: 2,500 ft overcast
- Temperature: 61 °F, dew point 37 °F
- Altimeter: 30.00 inHg

## 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 19910724029789A](https://openairdocs.org/incident/19910724029789A), Jul 24, 1991: Cessna U206F, Cube Cove, AK, Substantial damage. Brakes failed on landing roll. Ran off end runway into ditch and nosed over. Aluminum brakeline cracked. Lost fluid

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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