# NTSB CHI79FEM16: Cessna 421B, N699DT, Cadillac, MI, February 28, 1979

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: February 28, 1979
- Place: Cadillac, MI · CADILLAC, MI
- Location: 44.2466° N, 85.4323° W: Placed by OpenAirDocs: center of Cadillac, MI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.2466&lon=-85.4323&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report April 17, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 137895
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI79FEM16
- Page: https://openairdocs.org/ntsb/CHI79FEM16

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0232  79/2/28    CADILLAC,MI         CESSNA 421B         CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 46, 5620
        TIME - 1230                    N699DT              PX-  0  0  2  BUSINESS                  TOTAL HOURS, 250 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - WEXFORD COUNTY
        DEPARTURE POINT             INTENDED DESTINATION
          MINNEAPOLIS,MN              CADILLAC,MI
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           AIRFRAME - LANDING GEAR: NORMAL RETRACTION/EXTENSION ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPER ALIGNMENT/ADJUSTMENT
        REMARKS- L/G BRACE ASSY OUT OF RIG BECAUSE OF BUCKLE NEAR NEAR FWD TRUNNION,CALSE OF BUCKLE UNDET.
```

## Aircraft

- Registration: [N699DT](https://openairdocs.org/deregistered/N699DT-1993-11-19), registration cancelled 1993-11-19, S/N 421B0540 (OpenAirDocs)
- Reported make and model: CESSNA 421B
- Registry model: [Cessna 421B](https://openairdocs.org/model/cessna-421b) (registry code 2076014) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Wexford County

## 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 19790228003869A](https://openairdocs.org/incident/19790228003869A), Feb 28, 1979: Cessna 421B, Cadillac, MI, Substantial damage. Landing gear collapsed on landing. Landing gear downlock improperly rigged.

## Other investigations on N699DT (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 ATL93LA108](https://openairdocs.org/ntsb/ATL93LA108), Jun 10, 1993: Cessna 421B (N699DT), Attalla, AL, destroyed. Probable cause: THE FAILURE OF THE LEFT ENGINE TURBOCHARGER DUE TO ROTOR SHAFT SEIZURE, WHICH RESULTED IN A LOSS OF ENGINE POWER.

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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