# NTSB NYC85LA248: Grumman American AA-1B, N2640R, Hamburg, NY, September 25, 1985

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: September 25, 1985, 18:20 local (23:20 UTC)
- Place: Hamburg, NY
- Coordinates: 42.720611, -78.830238 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.7206&lon=-78.8302&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor, 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 35970
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC85LA248
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/35970/pdf
- Page: https://openairdocs.org/ntsb/NYC85LA248

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, maneuvering
  - carburetor heat - improper use of, pilot in command (cause)
  - weather condition - carburetor icing conditions (contributing factor)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - rough/uneven (contributing factor)

## Analysis

THE PLT STATED THAT HE STARTED A MANEUVER AT 2700 FT. THE MANEUVER WAS A DIVE AFTER REDUCING PWR FOLLOWED BY A CLIMB WITH A LEFT TURN AT THE TOP FOLLOWED BY A DESCENDING LEFT TURN. THE TURN 'AT THE TOP' WAS UNCOORDINATED AND G FORCES OCCURRED. THROTTLE ADVANCEMENT AFTER THE MANEUVER PRODUCED NO ENG RESPONSE. A FIELD WAS SELECTED FOR A FORCED LNDG WHILE APPLYING CARBURETOR HEAT,AUX FUEL PUMP,RICH MIXTURE AND SWITCHING FUEL TANKS. THE PLT SAID 7 GALS OF FUEL REMAINED ABOARD. PWR IMPROVED AS THE ACFT NEARED THE GROUND. THE PLT ELECTED TO CONTINUE THE LNDG EVEN THOUGH THE FIELD WAS HEAVILY FURROWED. THE ACFT NOSED OVER AFTER LANDING. POST ACC INVEST REVEALED NO EVIDENCE OF MALFUNCTION. WEATHER CONDITIONS WERE FAVORABLE TO CARBURETOR/INDUCTION ICING.

## Aircraft

- Registration: N2640R (not matched to a registry record)
- Reported make and model: Grumman American AA-1B
- Category: Airplane
- Serial number: 0540
- Airframe hours: 1670
- Engines: LYCOMING 0235-C2C 108 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: David Mcclatchey
- Last inspection: Annual, September 18, 1984, 70 hours before
- Departed: 34D, ORCHARD PARK, NY

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 458 total, 400 in this make and model, 398 as pilot in command

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 60° at 4 knots
- Visibility: 40 statute miles
- Lowest ceiling: none
- Temperature: 61 °F, dew point 39 °F
- Altimeter: 30.00 inHg
- Observed at: BUF, 5 nm away

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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