# NTSB CHI80FA067: Aero Comdr 680FL, N4700E, Chicago, IL, September 3, 1980

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: September 3, 1980
- 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: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report December 15, 1980
- Report: Brief approved by the director
- NTSB case key (mKey): 128622
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI80FA067
- Page: https://openairdocs.org/ntsb/CHI80FA067

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2881   80/9/3    CHICAGO,IL          AERO COMDR 680FL    CR-  1  0  0  COMMERCIAL                ATP,FLIGHT INSTR., AGE
        TIME - 0453                    N4700E              PX-  0  0  0  AIR TAXI-CARGO            29, 2079 TOTAL HOURS, 10
                                       DAMAGE-DESTROYED    OT-  0  0  0                            IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - CHICAGO MIDWAY
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          CHICAGO,IL                  BLOOMINGTON,IL               PEORIA,IL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           COLLIDED WITH: TREES                                     LANDING: TRAFFIC PATTERN-CIRCLING
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         FIRE AFTER IMPACT
        REMARKS- NO 5 EXHAUST VLV SEAT IN L ENG CAME OUT OF RECESS.WITNESS OBSD ACFT IN TIGHT TURN BACK TO ARPT.
```

## Aircraft

- Registration: [N4700E](https://openairdocs.org/deregistered/N4700E-1981-03-30), registration cancelled 1981-03-30, S/N 1779148 (OpenAirDocs)
- Reported make and model: AERO COMDR 680FL
- Registry model: [Aero Commander 680FL](https://openairdocs.org/model/aero-commander-680fl) (registry code 0141608) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Chicago Midway

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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