# NTSB DEN89LA066: Cessna 172RG, N9439B, Larimore, ND, January 21, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: January 21, 1989, 09:50 local (15:50 UTC)
- Place: Larimore, ND
- Coordinates: 47.899173, -97.620018 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.8992&lon=-97.6200&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report January 22, 1991
- Report: Approved by Office Director
- NTSB case key (mKey): 17666
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN89LA066
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17666/pdf
- Page: https://openairdocs.org/ntsb/DEN89LA066

## Probable cause

INADEQUATE SUPERVISION BY THE FLIGHT INSTRUCTOR.  FACTORS RELATED TO THE ACCIDENT WERE:  FAILURE OF THE STUDENT PILOT TO ATTAIN A PROPER TOUCHDOWN POINT, HIS DELAY IN CONFIGURING THE AIRCRAFT & EXECUTING THE GO-AROUND, ICY/SNOWY RUNWAY CONDITIONS, AND THE SNOWBANK.

## Sequence of events

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

- On ground/water encounter with terrain/water, landing
  - touch-and-go - initiated
  - proper touchdown point - not attained, dual student (contributing factor)
  - touch-and-go - delayed, dual student (contributing factor)
  - supervision - inadequate, pilot in command(cfi) (cause)
  - airport facilities,runway/landing area condition - snow covered (contributing factor)
  - airport facilities,runway/landing area condition - icy (contributing factor)
  - terrain condition - snowbank (contributing factor)
- Nose over, landing

## Analysis

THE CFI SAID THE STUDENT PLT WAS AT THE CONTROLS & WAS MAKING A TOUCH-&-GO LANDING ON RWY 12, WHICH WAS 2800 X 50 FT. THE WIND WAS FROM THE SOUTH AT 10 KTS. THE TRAINEE LANDED LONG, & BY THE TIME THE ACFT WAS RECONFIGURED FOR TAKEOFF, ONLY ABOUT 800 FT OF RWY WAS REMAINING. THE CFI THOUGHT THE TRAINEE WOULD STOP & TAXI BACK FOR TAKEOFF; HOWEVER, THE TRAINEE ADVANCED THE THROTTLE FOR TAKEOFF. AT THAT TIME, THE CFI TOOK THE CONTROLS, CLOSED THE THROTTLE & ATTEMPTED TO STOP. THE ACFT SLID TO THE LEFT ON THE PACKED SNOW & ICE COVERED RWY, COLLIDED WITH A SNOW BANK BESIDE THE RWY & NOSED OVER.

## Aircraft

- Registration: [N9439B](https://openairdocs.org/aircraft/N9439B), registered now, S/N 172RG0822, built 1981 (OpenAirDocs)
- Reported make and model: CESSNA 172RG
- Registry model: [Cessna 172RG](https://openairdocs.org/model/cessna-172rg) (registry code 2072438) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 172RG0822
- Airframe hours: 4195
- Engines: LYCOMING O-360-F1A6 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: University Of North Dakota
- Registered owner: David A. Vaaler
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, January 14, 1989, 12 hours before
- Departed: GFK, GRAND FORKS, ND
- Destination: GFK
- Airport: ND31, Larimore, runway 12, 2,800 × 50 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 21; commercial, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 589 total, 59 in this make and model, 457 as pilot in command, 29 in the last 90 days, 3 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 10 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 25 °F
- Altimeter: 29.00 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 19890121001069A](https://openairdocs.org/incident/19890121001069A), Jan 21, 1989: Cessna 172RG, Larimore, ND, Substantial damage. Landed long on icy strip. Student began go around. CFI took over late,tried to stop,slid off runway and overturned.

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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