# NTSB OAK74DVA51: Alouette Iiib, N7326, Turlock, CA, March 30, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: March 30, 1974
- Place: Turlock, CA · TURLOCK, CA
- Location: 37.5055° N, 120.8593° W: Placed by OpenAirDocs: center of Turlock, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.5055&lon=-120.8593&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 1, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 186564
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK74DVA51
- Page: https://openairdocs.org/ntsb/OAK74DVA51

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0486  74/3/30    TURLOCK,CALIF       ALOUETTE IIIB       CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1000                    N7326               PX-  0  0  0  CONSTRUCTION              AGE 30, 4112 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            66 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - TURLOCK
        DEPARTURE POINT             INTENDED DESTINATION
          TURLOCK,CALIF               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: HOVERING
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - LUBRICATING SYSTEM: COOLER,OIL
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - OIL EXHAUSTION-ENGINE LUBRICATION SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - RPM-UNCONTROLLABLE-OVERSPEED
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- DURING HOVER FOR SLING LOAD ATTACH RPM SURGED DUE LOSS OF OIL TO GOV WHEN OIL COOLER RUPTURED.
```

## Aircraft

- Registration: [N7326](https://openairdocs.org/deregistered/N7326-1986-06-03), registration cancelled 1986-06-03, S/N 1924 (OpenAirDocs)
- Reported make and model: ALOUETTE IIIB
- Registry model: [Sud SA316B ALOUETTE III](https://openairdocs.org/model/sud-sa316b-alouette-iii) (registry code 8680207) (OpenAirDocs)
- Category: Helicopter
- Engines: turbo shaft
- Damage: Substantial damage
- Airport: Turlock

## 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 19740330007019A](https://openairdocs.org/incident/19740330007019A), Mar 30, 1974: Aerosp SA316B, Turlock, CA, Substantial damage. During hover for sling load attach RPM surged due loss of oil to gov when oil cooler ruptured.

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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