# NTSB DEN83LTE11: Eipper Formance MX-2, N3133L, Granby, CO, June 24, 1983

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: June 24, 1983, 13:00 local (19:00 UTC)
- Place: Granby, CO
- Coordinates: 40.079635, -105.929847 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.0796&lon=-105.9298&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16166
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN83LTE11
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16166/pdf
- Page: https://openairdocs.org/ntsb/DEN83LTE11

## 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, takeoff - initial climb
  - ignition system,spark plug - contamination (cause)
  - ignition system,spark plug - incorrect (cause)
- Forced landing, landing - flare/touchdown
- Nose down, landing - flare/touchdown

## Analysis

THE ULTRALIGHT NOSED DOWN DURING AN EMERGENCY LANDING AFTER THE ENGINE LOST POWER AT ABOUT 100' AGL AFTER TAKEOFF. THE PILOT ATTEMPTED A LANDING ON THE REMAINING RWY AFTER THE POWER LOSS, BUT THE ACFT COULD NOT BE FLARED AND ENDED UP ON THE RWY PARTIALLY INVERTED. THE REAR SPARK PLUG OF THE ENGINE WAS FOUND TO HAVE SMALL PARTICLES OF CARBON BETWEEN THE ELECTRODE AND FIRING POINT MAKING THE SPARK PLUG INOPERATIVE. THE SPARK PLUG WAS A CHAMPION TYPE N3C USED ON TWO-CYCLE GAS ENGINES.

## Aircraft

- Registration: N3133L (not matched to a registry record)
- Reported make and model: EIPPER FORMANCE MX-2
- Category: Ultralight, amateur-built
- Serial number: 3866
- Airframe hours: 30
- Engines: CUYUNA 2F430 32 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Granby Ultral Light Aviation
- Last inspection: Annual, June 30, 1982, 255 hours before
- Departed: GRANBY, CO
- Destination: GRANBY, CO

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 28; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 435 total, 87 in this make and model, 715 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: 290° at 3 knots, gusting 5
- Lowest ceiling: 15,000 ft broken

## 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 19830624031899A](https://openairdocs.org/incident/19830624031899A), Jun 24, 1983: Amtr QUICKSILVER, Granby, CO, Substantial damage. Engine quit on takeoff. Unable to flare on forced landing. Hit runway and became inverted.

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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