# NTSB LAX77FA020: Sikorsky H34J, N95958, Mt.Wilson, AZ, January 5, 1977

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: January 5, 1977
- Place: Mt.Wilson, AZ · MT.WILSON, AZ
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 1 minor, 4 uninjured
- Status: Completed, report March 25, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 157009
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX77FA020
- Page: https://openairdocs.org/ntsb/LAX77FA020

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0177   77/1/5    MT.WILSON,AZ        SIKORSKY H34J       CR-  0  0  3  MISCELLANEOUS             COMMERCIAL, FL.INSTR.,
        TIME - 0845                    N95958              PX-  0  1  2  OTHER PUBLIC              AGE 47, 7027 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            70 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          LAS VEGAS,NV                MT.WILSON,AZ
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            LANDING: GO-AROUND
           ROLL OVER                                                LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - MISCELLANEOUS: POWERPLANT FAILURE FOR UNDETERMINED REASONS
        FACTOR(S)
           WEATHER - DOWNDRAFT,UPDRAFTS
           TERRAIN - ROUGH/UNEVEN
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          NONE                                                      32
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          110                                                       4
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
        REMARKS- PWR LOSS OR DWN DRFT ON APPRCH TO MTNS LDG SITE.PLT LNDD AMONG BOULDERS.
```

## Aircraft

- Registration: [N95958](https://openairdocs.org/deregistered/N95958-1977-07-19), registration cancelled 1977-07-19, S/N 148958 (OpenAirDocs)
- Reported make and model: SIKORSKY H34J
- Registry model: [Sikorsky H-34](https://openairdocs.org/model/sikorsky-h-34) (registry code 8141810) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- 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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