# NTSB DEN88LA018: Cessna 210, N6551X, Greeley, CO, October 24, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 24, 1987, 11:55 local (17:55 UTC)
- Place: Greeley, CO
- Location: 40.4374° N, 104.6332° W: Placed by OpenAirDocs at GREELEY-WELD COUNTY (GXY), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.4374&lon=-104.6332&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 11, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 17412
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN88LA018
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17412/pdf
- Page: https://openairdocs.org/ntsb/DEN88LA018

## Sequence of events

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

- Hard landing, landing - flare/touchdown
  - flare - misjudged, dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (cause)
- Loss of control - on ground/water, taxi - from landing
  - directional control - not possible (contributing factor)
  - proper assistance - not performed, pilot in command(cfi) (cause)
- On ground/water encounter with terrain/water, taxi - from landing
  - terrain condition - ditch (contributing factor)

## Analysis

THE CFI WAS INSTRUCTING THE PRIVATE RATED PLT IN SIMULATED FORCED LANDINGS.  THE PLT REPORTED THAT AFTER A FULL STOP LANDING, THE AIRCRAFT WOULD NOT TURN PROPERLY TO THE RIGHT, AND SHE SUSPECTED BRAKE SYSTEM FAILURE.  THE CFI TOOK CONTROL AND ATTEMPTED TO TAXI TO THE RAMP.  THE CFI REPORTED THAT THE AIRCRAFT WENT OFF THE TAXIWAY AND DROPPED OFF AN INCLINE. THE PROPELLER STRUCK THE TERRAIN AND THE MAIN GEAR ALSO DROPPED OFF THE INCLINE.  THE PLANE CAME TO AN ABRUPT STOP.  A POST ACCIDENT INSPECTION REVEALED DAMAGE TYPICAL OF HARD LANDING DAMAGE.  THE INSPECTION DID NOT REVEAL EVIDENCE OF PRE-ACCIDENT BRAKE SYSTEM DAMAGE OR FAILURE.

## Aircraft

- Registration: [N6551X](https://openairdocs.org/deregistered/N6551X-1990-08-14), registration cancelled 1990-08-14, S/N 57551 (OpenAirDocs)
- Reported make and model: CESSNA 210
- Registry model: [Cessna 210](https://openairdocs.org/model/cessna-210) (registry code 2073402) (OpenAirDocs)
- Category: Airplane
- Serial number: 57551
- Airframe hours: 2930
- Engines: CONTINENTAL IO-470-E 260 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Hoffman,Richard W.
- Registered owner: Hoffman, Richard W.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, March 13, 1987, 31 hours before
- Departed: 1W1, DENVER, CO
- Destination: GXY, GREELEY, CO
- Airport: GXY, Greeley-Weld County, runway 9, 7,035 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 71; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 11,501 total, 328 in this make and model, 11,318 as pilot in command, 93 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 30 statute miles
- Lowest ceiling: none

## 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 19871024065929A](https://openairdocs.org/incident/19871024065929A), Oct 24, 1987: Cessna 210, Greeley, CO, Substantial damage. Made a hard landing. Damaged done to this aircraft indicates a stall landing.

## Other investigations on N6551X (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 OAK68F0264](https://openairdocs.org/ntsb/OAK68F0264), Jan 3, 1968: Cessna 210 (N6551X), Forest Hill, CA, 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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.