# NTSB DEN67A0050: Boeing 727, N7412U, Polo, IL, March 6, 1967

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: March 6, 1967
- Place: Polo, IL · POLO, IL
- Location: 41.9848° N, 89.5804° W: Placed by OpenAirDocs: center of Polo, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.9848&lon=-89.5804&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 1 minor, 72 uninjured
- Status: Completed, report June 29, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 119034
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN67A0050
- Page: https://openairdocs.org/ntsb/DEN67A0050

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0013   67/3/6    POLO,ILL            BOEING 727          CR-  0  1  5  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1340                    N7412U              PX-  0  0 68                            47, 15000 TOTAL HOURS,
                                       DAMAGE-NONE         OT-  0  0  0                            728 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        OPERATOR - UNITED AIR LINES,INC.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           TURBULENCE                                               IN FLIGHT: CLIMB TO CRUISE
        PROBABLE CAUSE(S)
           WEATHER - TURBULENCE IN FLIGHT,CLEAR AIR
           PERSONNEL - FLIGHT PERSONNEL
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEAT BELT NOT FASTENED
        WEATHER BRIEFING - COMPANY DISPATCH
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        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                  TYPE OF WEATHER CONDITIONS
          NONE                                                     VFR
        TYPE OF FLIGHT PLAN
          IFR
        REMARKS- SEAT BELT SIGN WAS ON.
```

## Aircraft

- Registration: N7412U (not matched to a registry record)
- Reported make and model: BOEING 727
- Category: Airplane
- Engines: turbo fan
- 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.

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