# NTSB ATL82FIG07: Grumman G-164A, N6620Q, Frederick, MD, May 27, 1982

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Final report
- Date: May 27, 1982, 14:15 local (18:15 UTC)
- Place: Frederick, MD
- Location: 39.4385° N, 77.4117° W: Placed by OpenAirDocs: center of Frederick, MD, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.4385&lon=-77.4117&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal, 1 minor; on the ground: 1 fatal
- Status: Completed, report May 27, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 70749
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL82FIG07
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/70749/pdf
- Page: https://openairdocs.org/ntsb/ATL82FIG07

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, cruise - normal
  - fluid,fuel - contamination (cause)
  - fluid,fuel - water (cause)
  - maintenance,service of aircraft/equipment - improper (cause)
- Forced landing, landing - flare/touchdown
- In flight collision with object, landing - flare/touchdown
  - object - vehicle (contributing factor)
  - clearance - misjudged, pilot in command (cause)

## Analysis

THE PILOT REPORTED THAT 1 TO 2 OUNCES OF WATER WAS DRAINED FROM THE LOW POINT FUEL SUMP, BUT NO WATER WAS DETECTED FROM THE OTHER SUMPS. HE STATED THAT HE DRAINED THE SUMP UNTIL NO WATER WAS DETECTED. DURING THE FLIGHT, THE ENGINE SURGED TWICE, THEN LOST POWER MOMENTARILY. IT WAS RESTARTED, BUT A SHORT TIME LATER, IT STOPPED AGAIN AND COULD NOT BE RESTARTED. REPORTEDLY, A FOUR LANE HIGHWAY WAS THE ONLY SUITABLE LANDING AREA. DURING THE LANDING, THE PILOT ATTEMPTED TO LAND IN A CLEAR SPACE BETWEEN THE VEHICLES ON THE ROADWAY. HOWEVER, THE AIRCRAFT STRUCK A CAR, THEN WENT INTO A DITCH AND NOSED OVER. THE CAR STRUCK THE ROAD EMBANKMENT, AND LATER, THE DRIVER DIED. WATER AND MUDDY RESIDUE WERE FOUND IN THE MAIN FUEL STRAINER AND CARBURETOR. WATER WAS ALSO FOUND IN THE FUEL FILTER FOR THE UNDERGROUND FUEL STORAGE TANK AND THE TRUCK-MOUNTED PORTABLE FUEL TANK.

## Aircraft

- Registration: [N6620Q](https://openairdocs.org/aircraft/N6620Q), registered now, S/N 1693, built 1976 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164A
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1693
- Airframe hours: 1700
- Engines: P & W R-3140 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 137
- Operator: Shenandoah
- Registered owner: Shenandoah
- Departed: MARTINSBURG, WV
- Destination: ROTSTRAVER, PA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; flight hours: 6,000 total, 2,500 in this make and model, 5,800 as pilot in command, 80 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 3 statute miles
- Lowest ceiling: 1,000 ft overcast

## 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 19820527019519A](https://openairdocs.org/incident/19820527019519A), May 27, 1982: Scwzer G164A, Frederick, MD, Substantial damage, 1 fatal. Engine quit. Struck a vehicle during emergency landing on a highway. Dirty water in fuel.

## Other investigations on N6620Q (2)

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 NYC06LA180](https://openairdocs.org/ntsb/NYC06LA180), Jul 23, 2006: Grumman G-164A (N6620Q), Vineland, NJ, substantial damage. Probable cause: A loss of engine power due to foreign object damage for undetermined reasons. Contributing to the accident was the furrowed field.
- [NTSB NYC96LA105](https://openairdocs.org/ntsb/NYC96LA105), May 14, 1996: Grumman-Schweizer G-164A (N6620Q), Vineland, NJ, substantial damage. Probable cause: failure of the number 8 cylinder, which resulted in loss of engine power, a forced landing in soft terrain, and subsequent nose over of the airplane.

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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