# NTSB ANC74DAD15: Hughes 369HS, N9099F, Petersburg, AK, April 2, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 2, 1974
- Place: Petersburg, AK · PETERSBURG, AK
- Location: 56.8113° N, 132.9513° W: Placed by OpenAirDocs: center of Petersburg, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=56.8113&lon=-132.9513&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 4, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 170197
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC74DAD15
- Page: https://openairdocs.org/ntsb/ANC74DAD15

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3343   74/4/2  NR.PETERSBURG,ALAS    HUGHES 369HS        CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 33, 2486
        TIME - 1245                    N9099F              PX-  0  0  0  CORP/EXEC                 TOTAL HOURS, 394 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          PETERSBURG,ALAS            PETERSBURG,ALAS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            LANDING: POWER-ON LANDING
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - TURBINE ASSEMBLY: WHEEL TURBINE
           MISCELLANEOUS ACTS,CONDITIONS - OVERHEATED
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
           PILOT IN COMMAND - MISJUDGED SPEED AND ALTITUDE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- THERMAL FATIGUE,1ST STAGE.
```

## Aircraft

- Registration: N9099F (not matched to a registry record)
- Reported make and model: HUGHES 369HS
- 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 19740402011569A](https://openairdocs.org/incident/19740402011569A), Apr 2, 1974: Hughes 369HS, Petersburg, AK, Substantial damage. Thermal fatigue,1st stage.

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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