# NTSB SEA92LA103: E.E. Shilling Q-2, N21QQ, Billings, MT, May 16, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 16, 1992, 15:00 local (21:00 UTC)
- Place: Billings, MT
- Coordinates: 45.980422, -108.680519 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.9804&lon=-108.6805&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 28, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 41679
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA92LA103
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41679/pdf
- Page: https://openairdocs.org/ntsb/SEA92LA103

## Probable cause

AN UNDETERMINED LOSS OF ENGINE POWER.

## Sequence of events

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

- Loss of engine power, climb - to cruise
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - open field

## Analysis

DURING A TEST FLIGHT FOLLOWING AN ENGINE OVERHAUL, THE PILOT REPORTED THAT EVERYTHING WAS NORMAL FOR THE START, TAXI, TAKEOFF AND CLIMB TO 2,000 FEET AGL. A SLIGHT ROUGHNESS WAS NOTED AND CORRECTED WITH A RICHER MIXTURE. A SHORT TIME LATER, THE ENGINE BEGAN TO RUN ROUGH AGAIN AND A FULL RICH MIXTURE WAS REQUIRED FOR NORMAL OPERATION. THE FLIGHT WAS RETURNING TO THE AIRPORT WHEN THE ENGINE ROUGHNESS INCREASED UNTIL THERE WAS A TOTAL POWER LOSS. UNABLE TO REACH THE RUNWAY, THE PILOT INITIATED A FORCED LANDING TO A WHEAT FIELD. DURING THE LANDING ROLL, THE AIRPLANE COLLIDED WITH THE TERRAIN. DURING THE POST-CRASH INVESTIGATION, THE PILOT REPORTED THAT THIS ENGINE HAD EXPERIENCED SEVERAL POWER LOSSES OVER THE PAST 28 HOURS FLIGHT TIME SINCE THE AIRPLANE WAS BUILT, WITH NO DEFINITE REASON FOUND AS TO THE CAUSE OF THE PROBLEMS. THE PILOT STATED THAT HE WAS GOING TO REPLACE THE ENGINE WITH ANOTHER AND WAS NOT GOING TO HAVE THE ACCIDENT ENGINE INSPECTED.

## Aircraft

- Registration: [N21QQ](https://openairdocs.org/aircraft/N21QQ), registered now, S/N 2005, built 1983 (OpenAirDocs)
- Reported make and model: E.E. SHILLING Q-2
- Registry model: [Shilling E E Q-2](https://openairdocs.org/model/shilling-e-e-q-2) (registry code 05645MA) (OpenAirDocs)
- Registry engine: [Revmaster 2100](https://openairdocs.org/engine/revmaster-2100) (registry code 52550, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 2005
- Airframe hours: 275
- Engines: REVMASTER 2100 DQ 80 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Michael R. Moore
- Registered owner: Michael R. Moore
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, October 4, 1991, 10 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 32; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 179 total, 21 in this make and model, 132 as pilot in command, 5 in the last 90 days, 4 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 4 knots, gusting 6
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 70 °F, dew point 39 °F

## 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 19920516015099A](https://openairdocs.org/incident/19920516015099A), May 16, 1992: Amtrqk QUICKIE2, Billings, MT, Substantial damage. Engine quit on test flight after engine overhaul. Damaged landing in rough field.

## Other investigations on N21QQ (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 DEN86LA228](https://openairdocs.org/ntsb/DEN86LA228), Aug 8, 1986: E. E. Schilling Q-2 (N21QQ), Billings, MT, 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.

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