# NTSB ANC81FA082: Hughes 369D, N8366F, Umiat, AK, July 21, 1981

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: July 21, 1981
- Place: Umiat, AK · UMIAT, AK
- Location: 69.3669° N, 152.1442° W: Placed by OpenAirDocs: center of Umiat, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=69.3669&lon=-152.1442&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 3 minor
- Status: Completed, report April 26, 1982
- Report: Brief approved by the director
- NTSB case key (mKey): 123628
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC81FA082
- Page: https://openairdocs.org/ntsb/ANC81FA082

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3556  81/7/21  NR.UMIAT,AK           HUGHES 369D         CR-  0  0  1  COMMERCIAL                ATP,FLIGHT INSTR., AGE
        TIME - 1500                    N8366F              PX-  0  0  2  AIR TAXI-PASSG            29, 3510 TOTAL HOURS, 310
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         UMIAT,AK                     LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: HOVERING
        PROBABLE CAUSE(S)
           ROTORCRAFT - FLIGHT CONTROL SYSTEMS: CYCLIC PITCH CONTROL SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        REMARKS- NOSED OVR FM 3FT HOVER.FND CYCLIC TRIM MOTOR/ACTUATOR FULL FWD,WORN,BUT CKD NORMAL.CO FLT PLN.
```

## Aircraft

- Registration: [N8366F](https://openairdocs.org/aircraft/N8366F), registered now, S/N 270082D (OpenAirDocs)
- Reported make and model: HUGHES 369D
- Registry model: [Hughes Helicopters HUGHES 369D](https://openairdocs.org/model/hughes-helicopters-hughes-369d) (registry code 4470706) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- 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 19810721043729A](https://openairdocs.org/incident/19810721043729A), Jul 21, 1981: Hughes 369D, Umiat, AK, Substantial damage. Helicopter began to nose down on takeoff. Unable to correct. Cause undetermined. Suspect cyclic malfunction.

## Other investigations on N8366F (2)

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 SEA03LA021](https://openairdocs.org/ntsb/SEA03LA021), Dec 24, 2002: Hughes 369D (N8366F), Boise, ID, substantial damage. Probable cause: The failure of the operator's maintenance personnel to properly rig the left/right seat twistgrip throttles to the engine fuel control, the pilot in command's failure to adhere to the rotorcraft…
- [NTSB LAX88LA095](https://openairdocs.org/ntsb/LAX88LA095), Jan 24, 1988: Hughes 369D (N8366F), Rialto, CA, substantial damage

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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