# NTSB IAD77FA058: Grum Amer AA1-B, N9677L, Unity, MD, August 11, 1977

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: August 11, 1977
- Place: Unity, MD · UNITY, MD
- Location: 39.2262° N, 77.0694° W: Placed by OpenAirDocs: center of Unity, MD, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.2262&lon=-77.0694&mi=10
- Phase of flight: [Uncontrolled descent](https://openairdocs.org/ntsb-phases/650) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report January 10, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 145473
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD77FA058
- Page: https://openairdocs.org/ntsb/IAD77FA058

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3932  77/8/11    UNITY,MD            GRUM AMER AA1-B     CR-  1  0  0  NONCOMMERCIAL             PRIVATE, AGE 23, 294
        TIME - 2145                    N9677L              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 109 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          COLLEGE PARK,MD             FINDLAY OH
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - CONTINUED VFR FLIGHT INTO ADVERSE WEATHER CONDITIONS
           PILOT IN COMMAND - SPATIAL DISORIENTATION
        FACTOR(S)
           WEATHER - THUNDERSTORM ACTIVITY
           MISCELLANEOUS ACTS,CONDITIONS - PILOT FATIGUE
        WEATHER BRIEFING - BRIEFED BY FLIGHT SERVICE PERSONNEL, BY PHONE
        WEATHER FORECAST - WEATHER SLIGHTLY WORSE THAN FORECAST
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          OVERCAST                                                 UNKNOWN/NOT REPORTED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          UNKNOWN/NOT REPORTED                                      THUNDERSTORM, RAIN SHOWERS
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TYPE OF WEATHER CONDITIONS
          UNKNOWN/NOT REPORTED                                     IFR
        TYPE OF FLIGHT PLAN
          NONE
        REMARKS- PLT ON-DUTY AT LEAST 17 HRS PRIOR TO ACDNT.
```

## Aircraft

- Registration: [N9677L](https://openairdocs.org/deregistered/N9677L-1978-03-03), registration cancelled 1978-03-03, S/N AA1B-0177 (OpenAirDocs)
- Reported make and model: GRUM AMER AA1-B
- Registry model: [Grumman American Avn. AA-1B](https://openairdocs.org/model/grumman-american-avn-aa-1b) (registry code 3960103) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed

## 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 19770811038709A](https://openairdocs.org/incident/19770811038709A), Aug 11, 1977: Grumav AA1B, Unity, MD, Destroyed. Plt on-duty at least 17 hrs prior to acdnt.

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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