# NTSB ANC84LA179: Cessna 140, N90170, Middle River, AK, September 17, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 16, 1984, 16:00 local (Sep 17, 1984, 00:00 UTC)
- Place: Middle River, AK
- 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 office: Alaska Regional Office
- NTSB case key (mKey): 4373
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC84LA179
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4373/pdf
- Page: https://openairdocs.org/ntsb/ANC84LA179

## 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 - undetermined (cause)
  - directional control - not possible, pilot in command
- On ground/water collision with object, landing - roll
  - object - tree(s)

## Analysis

PLT STATED RIGHT BRAKE PRESSURE WAS LOST DURING LANDING ROLL. ACFT VEERED OFF LEFT SIDE OF RWY AND CONTACTED TREES. POST ACCIDENT TESTING REVEALED NO EVIDENCE OF A RIGHT BRAKE FAILURE OR MALFUNCTION.

## Aircraft

- Registration: [N90170](https://openairdocs.org/deregistered/N90170-2013-05-17), registration cancelled 2013-05-17, S/N 9235, built 1946 (OpenAirDocs)
- Reported make and model: CESSNA 140
- Registry model: [Cessna 140](https://openairdocs.org/model/cessna-140) (registry code 2071602) (OpenAirDocs)
- Registry engine: [Continental C85 series](https://openairdocs.org/engine/continental-c85-series) (registry code 17008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 9235
- Engines: CONTINENTAL C-85 85 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Martin Williams
- Airworthiness certificate: Standard, Normal
- Departed: MRI, ANCHORAGE, AK
- Destination: MIDDLE RIVER, AK
- Airport: Middle River, runway 36, 1,000 ×  ft, dirt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 27; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 600 total, 300 in this make and model, 538 as pilot in command, 102 in the last 90 days, 50 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 10 knots
- Visibility: 100 statute miles
- Lowest ceiling: none
- Temperature: 55 °F, dew point 25 °F

## 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 19840916049239A](https://openairdocs.org/incident/19840916049239A), Sep 16, 1984: Cessna 140, Middle River, AK, Substantial damage. On landing rollout, right brake failed. Veered off side of runway. Crack in brake caliper housing but checked ok.

## Other investigations on N90170 (1)

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.

- [NTSB MIA66D0054](https://openairdocs.org/ntsb/MIA66D0054), May 31, 1965: Cessna 140 (N90170), Franklin, NC, substantial damage

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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