# NTSB CHI75AC005: Boeing 727, N6818, Chicago, IL, July 10, 1974

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: July 10, 1974
- 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: 2 serious, 9 minor, 42 uninjured
- Status: Completed, report November 6, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 170163
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI75AC005
- Page: https://openairdocs.org/ntsb/CHI75AC005

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0028  74/7/10    CHICAGO,ILL         BOEING 727          CR-  0  0  8  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1838                    N6818               PX-  0  2 43                            57, 19153 TOTAL HOURS,
                                       DAMAGE-NONE         OT-  0  0  0                            4100 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - O'HARE INTL
        OPERATOR - AMERICAN AIRLINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          CHICAGO,ILL                 WASHINGTON,DC
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            STATIC: PARKED-ENGINES NOT OPERATING
        PROBABLE CAUSE(S)
           SYSTEMS - FIRE WARNING SYSTEM: POWERPLANT
        FACTOR(S)
           PERSONNEL - TRAFFIC CONTROL PERSONNEL: OTHER
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT
                                  FALSE FIRE WARNING
        REMARKS- #3 ENG FIRE WARNING IN CLIMB.RTRND TO ARPT.DELAY SWITCHING TO CRASH FREQ.INJURIES ON EVAC.NO FIRE.
```

## Aircraft

- Registration: [N6818](https://openairdocs.org/deregistered/N6818-1999-09-16), registration cancelled 1999-09-16, S/N 19493 (OpenAirDocs)
- Reported make and model: BOEING 727
- Registry model: [Boeing 727-223](https://openairdocs.org/model/boeing-727-223) (registry code 1384074) (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.

---
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.