# NTSB DEN90LA132: Lund Mustang II, N81BL, Hamilton, MT, June 5, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 5, 1990, 09:15 local (15:15 UTC)
- Place: Hamilton, MT
- Coordinates: 46.160037, -114.13961 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.1600&lon=-114.1396&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 4, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 17949
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN90LA132
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17949/pdf
- Page: https://openairdocs.org/ntsb/DEN90LA132

## Probable cause

THE INADEQUATE COMPENSATION FOR THE WIND CONDITIONS BY THE PILOT.

## Sequence of events

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

- On ground/water encounter with weather, landing - roll
  - weather condition - gusts (contributing factor)
  - compensation for wind conditions - inadequate, pilot in command (cause)
  - weather condition - crosswind (contributing factor)
- Loss of control - on ground/water, landing - roll
- Dragged wing,rotor,pod,float or tail/skid, landing - roll

## Analysis

THE PRIVATE PILOT AND A PAX WERE COMPLETING A X-COUNTRY FLIGHT IN HIS HOMEBUILT MUSTANG II. HE REPORTED LANDING ON RWY 16 (4,200 X 75 FT ASPHALT RWY) WITH WINDS HE ESTIMATED WERE FROM 250 DEG AT 25, GUSTING TO 45 KNOTS. HE SAID THAT DURING THE LANDING ROLL, A GUST LIFTED THE RIGHT WING AND DRAGGED THE LEFT WING ON THE RWY. HE CONTINUED TO THE TIEDOWN AND FOUND THE WING SPAR BENT.

## Aircraft

- Registration: N81BL (not matched to a registry record)
- Reported make and model: LUND MUSTANG II
- Category: Airplane, amateur-built
- Serial number: 1043
- Engines: LYCOMING IO-360-B1A 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Burt G. Lund
- Registered owner: Unknown
- Departed: V35, CALDWELL, ID
- Flight plan: VFR
- Airport: 6S5, Ravalli City, runway 16, 4,200 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 74; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 909 total, 417 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 10 knots, gusting 45
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: -0 °F, dew point -0 °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 19900605020069A](https://openairdocs.org/incident/19900605020069A), Jun 5, 1990: Amtrbb MUSTANG2, Hamilton, MT, Substantial damage. Wind lifted a wing while landing in severe crosswind. Low wing hit runway. Taxied in and found bent wing spar.

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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