# NTSB ATL90LA094: Grumman AA-5B, N74651, Stone Mountain, GA, April 9, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 9, 1990, 13:20 local (17:20 UTC)
- Place: Stone Mountain, GA
- Location: 33.8042° N, 84.1714° W: Placed by OpenAirDocs: center of Stone Mountain, GA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.8042&lon=-84.1714&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 9, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 8228
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL90LA094
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/8228/pdf
- Page: https://openairdocs.org/ntsb/ATL90LA094

## Probable cause

THE PILOT'S MISJUDGED APPROACH WHICH RESULTED IN A LONG, FAST LANDING AND SUBSEQUENT OVERRUN OF THE DEPARTURE THRESHOLD. FACTORS IN THE ACCIDENT WERE THE PILOT'S FAILURE TO LOWER THE FLAPS AND ESTABLISH A PROPER GLIDEPATH.

## Sequence of events

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

- Loss of engine power(partial) - nonmechanical, cruise
  - reason for occurrence undetermined (cause)
- Overrun, landing - roll
  - planned approach - misjudged, pilot in command (cause)
  - lowering of flaps - not performed, pilot in command (contributing factor)
  - proper glidepath - not selected, pilot in command (contributing factor)

## Analysis

THE PILOT REPORTED A ROUGH RUNNING ENGINE & HIS INTENTION TO LAND AT THE AIRPORT. HE STATED HE PLANNED TO LAND ON RWY 35 BUT WAS HIGH WHEN OVER THE RWY. A GO-AROUND WAS EXECUTED. HE SAID THE ENGINE RAN ROUGHLY THROUGH-OUT THE GO-AROUND SO HE KEPT HIS ALTITUDE. A LONG FAST LANDING RESULTED FOLLOWED BY RWY OVERRUN & NOSING OVER INVERTED. THE AIRPORT MANAGER SAID THE ENGINE SPUTTERED WHEN THE GO-AROUND WAS BEGUN BUT RAN WITHOUT HESITATION AFTERWARDS. THE FLAPS WERE RETRACTED AND THERE WERE NO FLAT SPOTS ON THE TIRES. NOTHING WAS FOUND TO INDICATE THAT THE ENGINE COULD NOT OPERATE. THE SPARK PLUGS INDICATED NORMAL OPERATION.

## Aircraft

- Registration: [N74651](https://openairdocs.org/deregistered/N74651-1991-10-17), registration cancelled 1991-10-17, S/N AA5B0324 (OpenAirDocs)
- Reported make and model: GRUMMAN AA-5B
- Registry model: [Grumman American Avn. AA-5B](https://openairdocs.org/model/grumman-american-avn-aa-5b) (registry code 3960105) (OpenAirDocs)
- Category: Airplane
- Serial number: AA5B-0324
- Airframe hours: 2966
- Engines: LYCOMING O-360-A4K 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: Robert E. Bridges
- Registered owner: Tiger Services, Inc.
- Last inspection: Annual, July 18, 1989, 144 hours before
- Departed: PDK, CHAMBLEE, GA
- Destination: BUY, BURLINGTON, NC
- Flight plan: IFR
- Airport: 00A, Stone Mountain-Britt Mem., runway 17, 2,812 × 45 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; private; airplane ratings: single-engine sea; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; flight hours: 387 total, 2 in this make and model, 272 as pilot in command, 20 in the last 90 days, 15 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 120° at 11 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 66 °F, dew point 30 °F
- Altimeter: 30.00 inHg
- Observed at: PDK, 5 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 19900409007949A](https://openairdocs.org/incident/19900409007949A), Apr 9, 1990: Gulstm AA5B, Stone Mountain, GA, Substantial damage. Rough engine,too high to land on 34.landed fast and long on 17, ran off into fence. Had oil fouled spark plugs.

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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