# NTSB MKC80DER10: Cessna 421A, N4025L, Crystal, MN, November 9, 1979

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: November 9, 1979
- Place: Crystal, MN · CRYSTAL, MN
- Location: 45.0373° N, 93.3595° W: Placed by OpenAirDocs: center of Crystal, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.0373&lon=-93.3595&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report March 19, 1980
- Report: Brief approved by the director
- NTSB case key (mKey): 132758
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC80DER10
- Page: https://openairdocs.org/ntsb/MKC80DER10

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3836   79/11/9   CRYSTAL,MN          CESSNA 421A         CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 23, 2378
        TIME - 2115                    N4025L              PX-  0  0  2  BUSINESS                  TOTAL HOURS, 13 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - CRYSTAL
        DEPARTURE POINT             INTENDED DESTINATION
          EDEN PRAIRIE,MN             CRYSTAL,MN
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           WHEELS-UP                                                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO ASSURE THE GEAR WAS DOWN AND LOCKED
        FACTOR(S)
           AIRFRAME - LANDING GEAR: LANDING GEAR WARNING AND INDICATING COMPONENTS
        REMARKS- LNDG GEAR FAILED TO EXTD FOR UNKN RSN.GEAR WRNG FLASHER UNIT,PN R102-12,INOP.
```

## Aircraft

- Registration: [N4025L](https://openairdocs.org/deregistered/N4025L-1991-08-21), registration cancelled 1991-08-21, S/N 421A0125 (OpenAirDocs)
- Reported make and model: CESSNA 421A
- Registry model: [Cessna 421A](https://openairdocs.org/model/cessna-421a) (registry code 2076012) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Crystal

## 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 19791109041109A](https://openairdocs.org/incident/19791109041109A), Nov 9, 1979: Cessna 421A, Crystal, MN, Substantial damage. Landed on runway, wheels up. Failed to ascertain gear down. Gear horn inop. Unknown why gear would not extend.

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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