# NTSB MKC90FA057: Beech B36TC, N3077G, Inver Grove Hgt, MN, March 1, 1990

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: March 1, 1990, 13:50 local (19:50 UTC)
- Place: Inver Grove Hgt, MN
- Coordinates: 44.879745, -93.040336 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.8797&lon=-93.0403&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report June 16, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 34880
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC90FA057
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34880/pdf
- Page: https://openairdocs.org/ntsb/MKC90FA057

## Probable cause

PREMATURE LIFT-OFF BY THE PILOT, WHILE TAKING OFF WITH A HEAVY GROSS WEIGHT IN UNFAVORABLE WINDS, AND THE PILOT'S FAILURE TO ATTAIN/MAINTAIN ADEQUATE AIRSPEED, WHICH RESULTED IN AN INADVERTENT STALL/MUSH.

## Sequence of events

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

- In flight collision with object, takeoff
  - weather condition - unfavorable wind
  - aircraft weight and balance - excessive
  - lift-off - premature, pilot in command (cause)
  - airspeed - not attained, pilot in command (cause)
  - stall/mush - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - water

## Analysis

THE ACFT WAS EQUIPPED WITH A TEMPORARY FUEL SYS TO FERRY IT TO SOUTH AFRICA.  ALSO, IT WAS APPROVED FOR SPECIAL FLT OPNS & A MAXIMUM GROSS WT LIMITATION OF 4235 LBS.  ITS ACTUAL WEIGHT FOR TAKEOFF WAS CALCULATED TO BE 3956 LBS.  THE PLT TOOK OFF ON RWY 16 FOR THE INITIAL FLT WITH THE WIND FROM ABOUT 240 DEG AT 17 KTS.  SHORTLY AFTER LIFT-OFF, THE ACFT WAS OBSERVED FLYING JUST ABOVE THE TREES IN A NOSE HI ATTITUDE. THE PLT TURNED THE ACFT ABOUT 90 DEG TO THE LEFT TOWARD A RIVER (DOWN SLOPE).  HE THEN TURNED IT FURTHER LEFT & ALIGNED ITS FLT PATH WITH THE RIVER.  HOWEVER, THE ACFT HIT A POLE ON A BOAT DOCK & CRASHED IN THE RIVER.  NO PREIMPACT PART FAILURE OR MALFUNCTION OF THE ACFT WAS FOUND DURING THE INVESTIGATION.  ONE WITNESS, WHO SAW THE ACFT AFTER TAKEOFF, SAID IT WAS MUSHING AS THE LNDG GEAR WAS BEING RETRACTED, THEN THE PLT 'MADE A STEEP BANK TO THE LEFT & WENT BELOW THE TREES.'

## Aircraft

- Registration: [N3077G](https://openairdocs.org/deregistered/N3077G-2018-02-15), registration cancelled 2018-02-15, S/N EA-424 (OpenAirDocs)
- Reported make and model: BEECH B36TC
- Registry model: [Beech B36TC](https://openairdocs.org/model/beech-b36tc) (registry code 1151609) (OpenAirDocs)
- Category: Airplane
- Serial number: EA-383
- Engines: CONTINENTAL TSIO-520-UB 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Ferry, Part 91
- Registered owner: Avex, Inc.
- Airworthiness certificate: Standard, Utility; Special, Special flight (Special)
- Departed: D97, SOUTH ST PAUL, MN
- Destination: SOUTH AFRICA
- Airport: D97, South St Paul Muni, runway 16, 4,000 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 26; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 1,073 total, 8 in this make and model, 919 as pilot in command, 75 in the last 90 days, 70 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 240° at 17 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 57 °F, dew point 25 °F
- Altimeter: 29.00 inHg
- Observed at: MSP, 20 nm away

## 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 19900301004869A](https://openairdocs.org/incident/19900301004869A), Mar 1, 1990: Beech B36TC, Inver Grove Hgt, MN, Destroyed, 1 fatal. Over normal gross due to overseas ferry tanks. Unable to climb, stalled, hit poles on dock and fell into river.

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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