# NTSB ATL83FA133: Grumman American AA-1B, N6266L, Chesapeake, VA, March 10, 1983

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Field investigation · Final report
- Date: March 10, 1983, 16:30 local (21:30 UTC)
- Place: Chesapeake, VA
- Coordinates: 36.750282, -76.220924 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.7503&lon=-76.2209&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed
- Report: Approved by Office Director
- ADs cited in the narratives: [AD 81-15-03](https://openairdocs.org/ad/81-15-03) (OpenAirDocs)
- NTSB case key (mKey): 5897
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL83FA133
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5897/pdf
- Page: https://openairdocs.org/ntsb/ATL83FA133

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, climb
  - fuel system,ram air/induction air - loose (cause)
  - maintenance,compliance with ad - not performed, other maintenance personnel (cause)
  - fuel system,ram air/induction air - blocked(partial) (cause)
- Forced landing, landing - flare/touchdown
- Nose gear collapsed, landing - roll
  - terrain condition - soft (contributing factor)
  - landing gear,nose gear - overload (contributing factor)

## Analysis

THE PLT TOOK OFF ON RWY 4 & MADE A CLIMBING LEFT TURN FOR A DOWNWIND DEPARTURE. AT APRX 900 FT, THERE WAS A PARTIAL LOSS OF POWER TO ABOUT IDLE RPM. THE PLT STATED THAT HE SWITCHED FUEL TANKS, APPLIED CARBURETOR HEAT & PUMPED THE THROTTLE, ALL TO NO AVAIL. HE TURNED BACK TO THE ARPT, BUT WAS UNABLE TO REACH THE RWY. THE NOSE GEAR COLLAPSED DURING A LANDING ON SOFT TERRAIN, APRX 150 YARDS SHORT OF RWY 22. AN INVESTIGATION REVEALED THAT THE INSIDE SCREEN & SPONGE ELEMENT OF THE AIR INTAKE FILTER, PN BA-4210, HAD COME LOOSE. SUBSEQUENTLY, THE SCREEN & SPONGE HAD BECOME LODGED IN THE THROAT OF THE CARBURETOR AIR BOX & OBSTRUCTED THE AIRFLOW TO THE CARBURETOR. THE METAL IN THE SCREEN WAS FOUND TO BE NON-MAGNETIC. AD 81-15-03 HAD BEEN ISSUED TO CORRECT THE FILTER PROBLEM BY REPLACING THE ALUMINUM SCREEN WITH A STEEL SCREEN.

## Aircraft

- Registration: [N6266L](https://openairdocs.org/deregistered/N6266L-2020-12-08), registration cancelled 2020-12-08, S/N AA1B-0066, built 1972 (OpenAirDocs)
- Reported make and model: GRUMMAN AMERICAN AA-1B
- Registry model: [American AA-1B](https://openairdocs.org/model/american-aa-1b) (registry code 0630820) (OpenAirDocs)
- Registry engine: [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series) (registry code 41505, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Serial number: AA1B0066
- Airframe hours: 2723
- Engines: LYCOMING O-235 108 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Registered owner: Flightline Aviation
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, January 8, 1983, 14 hours before
- Destination: ECG, ELIZABETH CITY, NC
- Airport: W36, Chesapeake Municipal, runway 22, 3,600 × 60 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 67; private; airplane ratings: single-engine land; medical: class 3, expired; seat: left; flight hours: 8,000 total, 40 in this make and model, 10 as pilot in command, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 70° at 8 knots
- Visibility: 6 statute miles
- Lowest ceiling: none
- Temperature: 50 °F, dew point 45 °F
- Altimeter: 29.00 inHg
- Observed at: ORF, 10 nm away

## 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 19830310008599A](https://openairdocs.org/incident/19830310008599A), Mar 10, 1983: Gulstm AA1B, Chesapeake, VA, Substantial damage. Engine quit on downwind. Crash landed short of runway. Aluminum carb air filter lodged in carb intake. AD item.

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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