# NTSB ANC79DA086: Hughes 500C, N9090F, Alakanuk, AK, September 2, 1979

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: September 2, 1979
- Place: Alakanuk, AK · ALAKANUK, AK
- Location: 62.6889° N, 164.6153° W: Placed by OpenAirDocs: center of Alakanuk, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=62.6889&lon=-164.6153&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious, 1 minor
- Status: Completed, report August 18, 1980
- Report: Brief approved by the director
- ADs cited in the narratives: [AD 78-14-08](https://openairdocs.org/ad/78-14-08) (OpenAirDocs)
- NTSB case key (mKey): 133818
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC79DA086
- Page: https://openairdocs.org/ntsb/ANC79DA086

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3875   79/9/2  NR.ALAKANUK,AK        HUGHES 500C         CR-  0  0  1  COMMERCIAL                ATP,FLIGHT INSTR., AGE
        TIME - 1025                    N9090F              PX-  0  2  0  AIR TAXI-PASSG            28, 5410 TOTAL HOURS, 900
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         ALAKANUK,AK                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: HOVERING
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           POWERPLANT - FUEL SYSTEM: PUMP,FUEL
           MISCELLANEOUS ACTS,CONDITIONS - EXCESSIVE-WEAR/PLAY
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- FUEL PUMP DRIVE SHAFT SPLINES WORN.AD 78-14-08 NCW.ENG PWR LOST DRG HOVER AT APRX 50FT AGL.
```

## Aircraft

- Registration: [N9090F](https://openairdocs.org/deregistered/N9090F-2013-06-27), registration cancelled 2013-06-27, S/N 610325S, built 1971 (OpenAirDocs)
- Reported make and model: HUGHES 500C
- Registry model: [Hughes 369HS](https://openairdocs.org/model/hughes-369hs) (registry code 4470728) (OpenAirDocs)
- Registry engine: [Allison 250 SER 250HP](https://openairdocs.org/engine/allison-250-ser-250hp) (registry code 03002, turbo-shaft) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- Damage: 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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