# NTSB CHI67A0118: Convair 440, N4821C, Milwaukee, WI, April 15, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 15, 1967
- Place: Milwaukee, WI · MILWAUKEE, WI
- Location: 43.0389° N, 87.9065° W: Placed by OpenAirDocs: center of Milwaukee, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.0389&lon=-87.9065&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report January 18, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 118347
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI67A0118
- Page: https://openairdocs.org/ntsb/CHI67A0118

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0063  67/4/15    MILWAUKEE,WIS       CONVAIR 440         CR-  0  0  2  TRAINING                  AIRLINE TRANSPORT, AGE
        TIME - 0812                    N4821C              PX-  0  0  0                            35, 7250 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            4000 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - GENERAL MITCHELL
        OPERATOR - DELTA AIR LINES,INC.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR RETRACTED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - SPONTANEOUS-IMPROPER ACTION
           PILOT IN COMMAND - INADVERTENTLY RETRACTED GEAR
           PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
        REMARKS- SIMULATING NO HYDRAULIC PRESS/FLUID COND.PUT HYD BY-PASS HANDLE DOWN,GEAR LEVER WAS IN UP POSITION
```

## Aircraft

- Registration: [N4821C](https://openairdocs.org/deregistered/N4821C-1971-08-19), registration cancelled 1971-08-19, S/N 359 (OpenAirDocs)
- Reported make and model: CONVAIR 440
- Registry model: [Convair 440](https://openairdocs.org/model/convair-440) (registry code 2422902) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: General Mitchell

## Other investigations on N4821C (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 MIA69A0089](https://openairdocs.org/ntsb/MIA69A0089), Jun 10, 1969: Convair 440 (N4821C), Macon, GA, substantial 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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