# NTSB OAK68A0056: Convair 640, N5510K, Hilo, HI, January 28, 1968

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: January 28, 1968
- Place: Hilo, HI · HILO, HI
- Location: 19.7225° N, 155.0868° W: Placed by OpenAirDocs: center of Hilo, HI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=19.7225&lon=-155.0868&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 1 minor, 43 uninjured
- Status: Completed, report January 24, 1969
- Report: Brief approved by the director
- NTSB case key (mKey): 112130
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK68A0056
- Page: https://openairdocs.org/ntsb/OAK68A0056

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0035  68/1/28  NR.HILO,HAWAII        CONVAIR 640         CR-  0  0  3  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1415                    N5510K              PX-  0  1 41                            47, 19350 TOTAL HOURS,
                                       DAMAGE-NONE         OT-  0  0  0                            875 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        OPERATOR - HAWAIIAN AIRLINES,INC.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           TURBULENCE                                               IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PASSENGER
           MISCELLANEOUS ACTS,CONDITIONS - SEAT BELT NOT FASTENED
           WEATHER - TURBULENCE, ASSOCIATED W/CLOUDS AND/OR THUNDERSTORMS
        WEATHER BRIEFING - BRIEFED BY WEATHER BUREAU PERSONEL, BY PHONE
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          OVERCAST/LOWER SCATTERED                                  10000
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          ZERO                                                     HAIL
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TYPE OF WEATHER CONDITIONS
          NONE                                                     VFR
        TYPE OF FLIGHT PLAN
          IFR
        REMARKS- SEAT BELT SIGN ON. PAX INADVERTENTLY RELEASED SEAT BELT DURING TURB, WAS THROWN FROM SEAT.
```

## Aircraft

- Registration: [N5510K](https://openairdocs.org/deregistered/N5510K-2002-03-27), registration cancelled 2002-03-27, S/N 76, built 1953 (OpenAirDocs)
- Reported make and model: CONVAIR 640
- Registry model: [Convair 640-340D](https://openairdocs.org/model/convair-640-340d) (registry code 2422814) (OpenAirDocs)
- Registry engine: [Rolls-Royce DART-542 series](https://openairdocs.org/engine/rolls-royce-dart-542-series) (registry code 54522, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Engines: turbo prop
- Damage: No 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.

---
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.