# NTSB IAD75FIG03: Amer Avco AA1-B, Laytonsville, MD, August 20, 1974

- Type: NTSB accident investigation
- Date: August 20, 1974
- Place: Laytonsville, MD · LAYTONSVILLE, MD
- Location: 39.2089° N, 77.1353° W: Placed by OpenAirDocs: center of Laytonsville, MD, within about 6 miles (OpenAirDocs)
- Highest injury: Fatal
- Injuries: 1 fatal, 1 serious
- Status: Completed
- Report: DirectorBrief, October 11, 1974
- NTSB case key (mKey): 136860
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD75FIG03
- Page: https://openairdocs.org/ntsb/IAD75FIG03

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2774  74/8/20    LAYTONSVILLE,MD     AMER AVCO AA1-B     CR-  0  1  0  NONCOMMERCIAL             COMMERCIAL, AGE 26, 248
        TIME - 1936                    N9946L              PX-  1  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 35 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - BUTTS FARM
        DEPARTURE POINT             INTENDED DESTINATION
          LAYTONSVILLE,MD             FREDERICK,MD
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: TREES                                     TAKEOFF: INITIAL CLIMB
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           PILOT IN COMMAND - MISJUDGED DISTANCE,SPEED,ALTITUDE OR CLEARANCE
        FACTOR(S)
           AIRPORTS/AIRWAYS/FACILITIES - AIRPORT CONDITIONS: HIGH VEGETATION
           TERRAIN - HIGH OBSTRUCTIONS
        REMARKS- ACFT ABT 15LB OVR G/W.OWNERS MANUAL-HARD SFC 1915FT TO CLR 50FT OBSTACLE.TREE 2040FT FM PT OF DEP.
```

## Sequence of events

- Initial climb

## Aircraft

- Registration: N9946L, a cancelled registration (https://openairdocs.org/deregistered/N9946L-1975-06-11) (OpenAirDocs)
- Reported make and model: AMER AVCO AA1-B
- Registry model: Grumman American Avn. AA-1B (registry code 3960103, https://openairdocs.org/model/grumman-american-avn-aa-1b) (OpenAirDocs)
- Category: Airplane
- Damage: Substantial damage
- Airport: BUTTS FARM
- FAA reports: 19740820027799A (https://openairdocs.org/incident/19740820027799A) (OpenAirDocs)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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From OpenAirDocs.org, an independent open copy of NTSB and FAA data. The NTSB's own report is the official record of an investigation.