# NTSB IAD77IA057: Bell 206L, N16664, Poolesville, MD, August 7, 1977

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: August 7, 1977
- Place: Poolesville, MD · POOLESVILLE, MD
- Location: 39.1437° N, 77.4116° W: Placed by OpenAirDocs: center of Poolesville, MD, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.1437&lon=-77.4116&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 26, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 145609
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD77IA057
- Page: https://openairdocs.org/ntsb/IAD77IA057

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
5-0012   77/8/7    POOLESVILLE,MD      BELL 206L           CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1844                    N16664              PX-  0  0  0  AIR TAXI-CARGO            AGE 28, 3500 TOTAL HOURS,
                                       DAMAGE-NONE         OT-  0  0  0                            400 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        CLASSIFIED AS INCIDENT
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          NEW YORK,NY                 WASHINGTON,DC                FREDERICK,MD
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           POWERPLANT - LUBRICATING SYSTEM: COOLER,OIL
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        REMARKS- ENGINE OIL COOLER FAN SN 206-061-432-011,189.7 HRS ON PART.
```

## Aircraft

- Registration: [N16664](https://openairdocs.org/deregistered/N16664-1992-03-04), registration cancelled 1992-03-04, S/N 45076 (OpenAirDocs)
- Reported make and model: BELL 206L
- Registry model: [Bell 206L](https://openairdocs.org/model/bell-206l) (registry code 1181522) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- Damage: No damage

## Other investigations on N16664 (1)

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.

- [NTSB NYC90FA067](https://openairdocs.org/ntsb/NYC90FA067), Feb 10, 1990: Bell 206L (N16664), New York City, NY, substantial damage, 1 fatal. Probable cause: THE PILOT'S MISJUDGEMENT OF THE WIND RESULTING IN A DOWNWIND TAKEOFF. ADDITIONALLY THE LOSS OF LIFT WHEN THE HELICOPTER FLEW OFF THE HELIPORT PLATFORM, PRIOR TO REACHING EFFECTIVE TRANSLATIONAL LIFT,…

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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