# NTSB MKC77FER09: Aero Comdr 520, N4178B, St Paul, MN, December 7, 1976

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: December 7, 1976
- Place: St Paul, MN · ST PAUL, MN
- Location: 44.9444° N, 93.0933° W: Placed by OpenAirDocs: center of St. Paul, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.9444&lon=-93.0933&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 7 uninjured
- Status: Completed, report March 8, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 156649
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC77FER09
- Page: https://openairdocs.org/ntsb/MKC77FER09

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3862   76/12/7   ST PAUL,MN          AERO COMDR 520      CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 44, 453
        TIME - 0200                    N4178B              PX-  0  0  6  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 192 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - ST PAUL MUNI
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          EUGENE,OR                   ST PAUL,MN                   ROCK SPRINGS,WY
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR RETRACTED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO ASSURE THE GEAR WAS DOWN AND LOCKED
        FACTOR(S)
           AIRFRAME - LANDING GEAR: GEAR LOCKING MECHANISM
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
        REMARKS- RIGHT GEAR LIGHT DID NOT INDICATE GREEN LIGHT PRIOR TO LANDING.
```

## Aircraft

- Registration: [N4178B](https://openairdocs.org/deregistered/N4178B-2012-08-01), registration cancelled 2012-08-01, S/N 520-85, built 1953 (OpenAirDocs)
- Reported make and model: AERO COMDR 520
- Registry model: [Aero Commander 520](https://openairdocs.org/model/aero-commander-520) (registry code 0141202) (OpenAirDocs)
- Registry engine: [Lycoming GO-435C&D series](https://openairdocs.org/engine/lycoming-go-435c-d-series) (registry code 41521, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: St Paul Muni

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19761207040499A](https://openairdocs.org/incident/19761207040499A), Dec 7, 1976: Rkwell 520, St Paul, MN, Substantial damage. Right gear light did not indicate green light prior to landing.

## Other investigations on N4178B (2)

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 FTW79DRD16](https://openairdocs.org/ntsb/FTW79DRD16), Mar 4, 1979: Aero Comm 520 (N4178B), New Orleans, LA, destroyed
- [NTSB MKC78DCG06](https://openairdocs.org/ntsb/MKC78DCG06), Oct 29, 1977: Aero Comdr 520 (N4178B), Lamar, MO, 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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