# NTSB SEA87LA010: Britten-Norman BN-2A-20, N25SA, Lower Loon, ID, October 10, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 10, 1986, 12:00 local (18:00 UTC)
- Place: Lower Loon, ID
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 6 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40555
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA87LA010
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40555/pdf
- Page: https://openairdocs.org/ntsb/SEA87LA010

## Sequence of events

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

- Main gear collapsed, landing - roll
  - terrain condition - wet (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause)
  - weather condition - tailwind (contributing factor)
  - proper alignment - not maintained, pilot in command (cause)
  - wrong runway - selected, pilot in command (cause)
  - airport facilities,runway/landing area condition - inadequate
- Dragged wing,rotor,pod,float or tail/skid, landing - roll

## Analysis

THE PLT DIVERTED FROM HIS ORIGINAL DESTINATION DUE TO WEATHER. UPON LANDING AT THE ALTERNATE AIRPORT WIHT A 7 KNOT TAIL WIND, WHILE USING HEAVY BRAKING ON WET SOD, THE BRAKES LOCKED. THE ACFT VEERED TO THE RIGHT OF THE CENTER PLACING THE RIGHT MAIN GEAR ON ROUGH TERRAIN WHERE IT COLLAPSED, DRAGGING THE RIGHT WING. THE AIRSTRIP IS ONLY 1100 FEET LONG.

## Aircraft

- Registration: N25SA (not matched to a registry record)
- Reported make and model: Britten-Norman BN-2A-20
- Category: Airplane
- Serial number: 766
- Airframe hours: 4920
- Engines: LYCOMING IO540K1B5 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Operator: Mountain Bird, Inc., doing business as Salmon Air Taxi
- Registered owner: Mountain Bird, Inc.
- Airworthiness certificate: Standard, Normal
- Departed: SMN, SALMON, ID
- Destination: U54, BERNARD CREEK, ID
- Flight plan: Company VFR
- Airport: Lower Loon

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 5,825 total, 800 in this make and model, 5,600 as pilot in command, 330 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 340° at 5 knots, gusting 8
- Visibility: 25 statute miles
- Lowest ceiling: none
- Temperature: 55 °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 19861010048649A](https://openairdocs.org/incident/19861010048649A), Oct 10, 1986: Bnorm BN2A20, Lemhi Co, ID, Substantial damage. The aircraft veered off the airstrip during rollout from a downwind landing. Pilot locked wheels with brakes.

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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