# NTSB CHI66A0074: Douglas DC-9, N3307L, Chicago, IL, March 4, 1966

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: March 4, 1966
- 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: Serious injuries
- Injuries: 1 serious, 66 uninjured
- Status: Completed, report September 14, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 174027
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI66A0074
- Page: https://openairdocs.org/ntsb/CHI66A0074

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0012   66/3/4    CHICAGO ILL         DOUGLAS DC-9        CR-  0  0  4  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1220                    N3307L              PX-  0  1 62                            UNK/NR, UNK/NR TOTAL
                                       DAMAGE-NONE         OT-  0  0  0                            HOURS, UNK/NR IN TYPE,
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - O>HARE INTL
        OPERATOR - DELTA AIR LINES,INC.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            STATIC: PARKED-ENGINES NOT OPERATING
        PROBABLE CAUSE(S)
          FUSELAGE-STAIR DOOR HANDRAIL DRIVE TAPE FAILED.
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        REMARKS- DEPLANE PAX FELL WHEN STAIR HANDRAIL TELESCOPED
```

## Aircraft

- Registration: [N3307L](https://openairdocs.org/deregistered/N3307L-1973-12-27), registration cancelled 1973-12-27, S/N 45702 (OpenAirDocs)
- Reported make and model: DOUGLAS DC-9
- Registry model: [Mcdonnell Douglas DC-9-14](https://openairdocs.org/model/mcdonnell-douglas-dc-9-14) (registry code 302203F) (OpenAirDocs)
- Category: Airplane
- Engines: turbo fan
- Damage: No damage
- Airport: O>Hare Intl

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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