# NTSB CHI66I0012: Boeing 720B, N723US, Chicago, IL, July 31, 1965

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: July 31, 1965
- Place: Chicago, IL · CHICAGO, IL
- Location: 41.8500° N, 87.6501° W: Placed by OpenAirDocs: center of Chicago, IL, within about 9 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.8500&lon=-87.6501&mi=10
- Phase of flight: [Standing](https://openairdocs.org/ntsb-phases/150) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 92 uninjured
- Status: Completed, report December 23, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 176258
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI66I0012
- Page: https://openairdocs.org/ntsb/CHI66I0012

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0021  65/7/31    CHICAGO ILL         BOEING 720B         CR-  0  0  7  SCHED DOM PASSG SRV       CERTIFICATE UNKNOWN, AGE
        TIME - 0823                    N723US              PX-  0  0 85                            UNK/NR, UNK/NR TOTAL
                                       DAMAGE-MINOR        OT-  0  0  0                            HOURS, UNK/NR IN TYPE,
                                                                                                   UNK/NR INSTRUMENT RATED.
        CLASSIFIED AS INCIDENT
        NAME OF AIRPORT - OHARE INTERNATL
        OPERATOR - NORTHWEST AIRLINES,INC.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR COLLAPSED                                           STATIC: IDLING ENGINE(S)
```

## 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: Minor damage
- Airport: Ohare Internatl

## 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 UNK64X0855](https://openairdocs.org/ntsb/UNK64X0855), Mar 9, 1964: Boeing 720B (N723US), La Crosse, WI, incident, 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.