# NTSB UNK64X0855: Boeing 720B, N723US, La Crosse, WI, March 9, 1964

- Type: NTSB incident investigation
- Classification: Incident · Minor injuries · Closed
- Date: March 9, 1964
- Place: La Crosse, WI · LA CROSSE, WI
- Location: 43.8251° N, 91.2246° W: Placed by OpenAirDocs: center of La Crosse, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.8251&lon=-91.2246&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 4 minor, 74 uninjured
- Status: Completed, report February 24, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 184809
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X0855
- Page: https://openairdocs.org/ntsb/UNK64X0855

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0050   64/3/9    LA CROSSE WISC      BOEING 720B         CR-  0  0  7  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 0750                    N723US              PX-  0  0 71                            58, 25377 TOTAL HOURS,
                                       DAMAGE-NONE         OT-  0  0  0                            2282 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        CLASSIFIED AS INCIDENT
        OPERATOR - NORTHWEST AIRLINES,INC.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           TURBULENCE                                               IN FLIGHT: NORMAL CRUISE
        REMARKS- INJURED PASSENGERS SEAT BELTS NOT PROPERLY FASTENED.INJURED STEWARDESS SEAT BELT NOT FASTENED.
```

## Aircraft

- Registration: [N723US](https://openairdocs.org/deregistered/N723US-1972-03-22), registration cancelled 1972-03-22, S/N 18353 (OpenAirDocs)
- Reported make and model: BOEING 720B
- Registry model: [Boeing 720-051B](https://openairdocs.org/model/boeing-720-051b) (registry code 1383861) (OpenAirDocs)
- Category: Airplane
- Engines: turbo fan
- Damage: No damage

## Other investigations on N723US (1)

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.

- [NTSB CHI66I0012](https://openairdocs.org/ntsb/CHI66I0012), Jul 31, 1965: Boeing 720B (N723US), Chicago, IL, incident, minor 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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