# NTSB DEN92LA047: Cessna 172RG, N5282V, Elbert, CO, April 28, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 28, 1992, 09:20 local (15:20 UTC)
- Place: Elbert, CO
- Coordinates: 39.219314, -104.529037 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.2193&lon=-104.5290&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report July 26, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 18206
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN92LA047
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18206/pdf
- Page: https://openairdocs.org/ntsb/DEN92LA047

## Probable cause

FAILURE OF THE CRANKSHAFT LEFT ACCESSORY GEAR WHICH RESULTED IN A COMPLETE POWER LOSS.  A FACTOR WAS:  LACK OF SUITABLE TERRAIN FOR A FORCED LANDING.

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, cruise - normal
  - accessory drive assy,drive gear - fractured (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - rough/uneven
  - terrain condition - none suitable (contributing factor)

## Analysis

WHILE IN CRUISE FLIGHT AFTER BEING AIRBORNE APPROXIMATELY ONE HOUR A TOTAL LOSS OF POWER OCCURRED.  A FORCED LANDING WAS CONDUCTED TO TERRAIN WHICH WAS ROUGH AND UNEVEN.  DURING LANDING ROLL THE AIRCRAFT NOSED OVER. INVESTIGATION REVEALED A MECHANICAL FAILURE OF THE CRANKSHAFT LEFT ACCESSORY DRIVE GEAR.

## Aircraft

- Registration: [N5282V](https://openairdocs.org/deregistered/N5282V-1995-05-16), registration cancelled 1995-05-16, S/N 172RG0492 (OpenAirDocs)
- Reported make and model: CESSNA 172RG
- Registry model: [Cessna 172RG](https://openairdocs.org/model/cessna-172rg) (registry code 2072438) (OpenAirDocs)
- Category: Airplane
- Serial number: 172RG0492
- Airframe hours: 3127
- Engines: LYCOMING O-360-F1A6 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Aspen Air Corporation
- Registered owner: Flight Time One
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, January 10, 1992, 86 hours before
- Departed: APA, ENGLEWOOD, CO

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 48; airline transport, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 2,450 total, 200 in this make and model, 2,400 as pilot in command, 120 in the last 90 days, 70 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 10° at 12 knots
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 61 °F, dew point 39 °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 19920428011929A](https://openairdocs.org/incident/19920428011929A), Apr 28, 1992: Cessna 172RG, Elbert, CO, Substantial damage. Engine quit. Nosed over in rough field. Broken crankshaft idler gear.

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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