# NTSB OAK74FVW20: Hughes 269C, N9631F, Las Vegas, NV, May 13, 1974

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: May 13, 1974
- Place: Las Vegas, NV · LAS VEGAS, NV
- Location: 36.1750° N, 115.1372° W: Placed by OpenAirDocs: center of Las Vegas, NV, within about 7 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.1750&lon=-115.1372&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 1 uninjured
- Status: Completed, report July 15, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 124785
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK74FVW20
- Page: https://openairdocs.org/ntsb/OAK74FVW20

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1486  74/5/13    LAS VEGAS,NEV       HUGHES 269C         CR-  0  0  2  MISCELLANEOUS             COMMERCIAL, AGE 27, 454
        TIME - 1641                    N9631F              PX-  0  0  0  POLICE PATROL             TOTAL HOURS, 271 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          LAS VEGAS,NEV               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS - EVASIVE MANEUVER TO AVOID COLLISION
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- NR 3 EXHST VALVE FAILED.PLT FLARED PREMATURELY TO AVOID CHILDREN ON BALL FLD.
```

## Aircraft

- Registration: [N9631F](https://openairdocs.org/deregistered/N9631F-1991-03-26), registration cancelled 1991-03-26, S/N 320134 (OpenAirDocs)
- Reported make and model: HUGHES 269C
- Registry model: [Hughes 269C](https://openairdocs.org/model/hughes-269c) (registry code 4470504) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- 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 19740513012879A](https://openairdocs.org/incident/19740513012879A), May 13, 1974: Hughes 269C, Las Vegas, NV, Substantial damage. Nr 3 exhst valve failed. Plt flared prematurely to avoid children on ball fld.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.