# NTSB NYC77FHD16: Grum Amer AA1-B, N9686L, Bristol, PA, July 4, 1977

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: July 4, 1977
- Place: Bristol, PA · BRISTOL, PA
- Location: 40.1023° N, 74.8519° W: Placed by OpenAirDocs: center of Bristol, PA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.1023&lon=-74.8519&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report November 22, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 146053
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC77FHD16
- Page: https://openairdocs.org/ntsb/NYC77FHD16

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3320   77/7/4    BRISTOL,PA          GRUM AMER AA1-B     CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 17, 80 TOTAL
        TIME - 1330                    N9686L              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  HOURS, 73 IN TYPE, NOT
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - 3M ARPRT
        DEPARTURE POINT             INTENDED DESTINATION
          BRISTOL,PA                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           STALL: MUSH                                              LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: MASTER AND CONNECTING RODS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- ENG RAN ROUGH.PILOT SHUT DOWN IN TRAFFIC PATTERN.CONNECTING ROD CAP #3 CYL HAD SEPARATED.
```

## Aircraft

- Registration: [N9686L](https://openairdocs.org/deregistered/N9686L-2013-07-29), registration cancelled 2013-07-29, S/N AA1B-0186, built 1973 (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)
- Registry engine: [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series) (registry code 41505, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: 3m Arprt

## 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 19770704022709A](https://openairdocs.org/incident/19770704022709A), Jul 4, 1977: Grumav AA1B, Bristol, PA, Substantial damage. Eng ran rough. Pilot shut down in traffic pattern. Connecting rod cap #3 cyl had separated.

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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