# NTSB LAX71IL031: Boeing 747, N9666, Chicago, IL, November 28, 1970

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: November 28, 1970
- 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: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 80 uninjured
- Status: Completed, report February 11, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 159497
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX71IL031
- Page: https://openairdocs.org/ntsb/LAX71IL031

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0054  70/11/28 NR.CHICAGO,ILL        BOEING 747          CR-  0  0  7  SCHED DOM PASSG SRV       CERTIFICATE UNKNOWN, AGE
        TIME - 1320                    N9666               PX-  0  0 73                            UNK/NR, UNK/NR TOTAL
                                       DAMAGE-NONE         OT-  0  0  0                            HOURS, UNK/NR IN TYPE,
                                                                                                   UNK/NR INSTRUMENT RATED.
        CLASSIFIED AS INCIDENT
        OPERATOR - AMERICAN AIRLINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
         CHICAGO,ILL                  LOS ANGLES,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        REMARKS- AUTOPILOT FLIGHT DIRECTOR MALFUNCTIONED.MODE SELECTOR PANEL P/N25-90624-914 NOT MODIFIED.
```

## Aircraft

- Registration: N9666 (not matched to a registry record)
- Reported make and model: BOEING 747
- 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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