# NTSB IAD74FIA02: Piper PA-22, N3939P, Brandywine, MD, August 11, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 11, 1973
- Place: Brandywine, MD · BRANDYWINE, MD
- Location: 38.6828° N, 76.8845° W: Placed by OpenAirDocs: center of Brandywine, MD, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.6828&lon=-76.8845&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report October 17, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 189096
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD74FIA02
- Page: https://openairdocs.org/ntsb/IAD74FIA02

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2654  73/8/11    BRANDYWINE,MD       PIPER PA-22         CR-  0  0  2  NONCOMMERCIAL             COMMERCIAL, AGE 28, 3004
        TIME - 1830                    N3939P              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, UNK/NR IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          CRISFIELD,MD                CLINTON,MD
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           POWERPLANT - IGNITION SYSTEM: SPARK PLUG
           POWERPLANT - ENGINE STRUCTURE: CYLINDER ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - LOW COMPRESSION
           TERRAIN - HIDDEN OBSTRUCTIONS
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- NR 3 CYL SHOWED LOW COMPRESSION SPARK PLUGS SHOWED SHOWED DETONATION,FOULING.NOSE GR ENTRD HOLE.
```

## Aircraft

- Registration: [N3939P](https://openairdocs.org/deregistered/N3939P-2018-07-19), registration cancelled 2018-07-19, S/N 22-3614, built 1956 (OpenAirDocs)
- Reported make and model: PIPER PA-22
- Registry model: [Piper PA-22-150](https://openairdocs.org/model/piper-pa-22-150) (registry code 7102210) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## 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 19730811024609A](https://openairdocs.org/incident/19730811024609A), Aug 11, 1973: Piper PA22150, Brandywine, VA, Substantial damage. Nr 3 cyl showed low compression spark plugs showed showed detonation,fouling. Nose gr entrd hole.

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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