# NTSB DEN82FA003: Aerospatial SA315B, N49531, Springville, UT, October 20, 1981

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: October 20, 1981
- Place: Springville, UT · SPRINGVILLE, UT
- Location: 40.1643° N, 111.6195° W: Placed by OpenAirDocs: center of Springville, UT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.1643&lon=-111.6195&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 3 minor, 2 uninjured
- Status: Completed, report November 13, 1981
- Report: Brief approved by the director
- Safety recommendations: Yes
- NTSB case key (mKey): 80136
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN82FA003
- Page: https://openairdocs.org/ntsb/DEN82FA003

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2485  81/10/20   SPRINGVILLE,UT      AEROSPATIAL SA315B  CR-  0  0  1  COMMERCIAL                ATP,FLIGHT INSTR., AGE
        TIME - 0736                    N49531              PX-  0  0  4  AIR TAXI-PASSG            33, 3503 TOTAL HOURS, 137
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          SPRINGVILLE,UT              LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: MAIN ROTOR                      IN FLIGHT: CLIMB TO CRUISE
           ROLL OVER                                                LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: CLUTCH ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPER ALIGNMENT/ADJUSTMENT
           MISCELLANEOUS ACTS,CONDITIONS - WRONG PART
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  SUSPECTED MECHANICAL DISCREPANCY
                                  UNUSUAL NOISE
        REMARKS- INCORRECT ENG MOUNT INSTALLED,PWR TRN NOT ALIGNED.LNDD ON NARROW RD LINED W TREES,ROLLED OVR.
```

## Aircraft

- Registration: N49531 (not matched to a registry record)
- Reported make and model: AEROSPATIAL SA315B
- 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 19811020068949A](https://openairdocs.org/incident/19811020068949A), Oct 20, 1981: Aerosp SA315B, Springville, UT, Substantial damage. Loud engine sound. Vibration. Hit trees, auto landing on a road. Bogus rear engine mount. Misaligned clutch tore up

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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