# NTSB MKC72AK013: Enstrom F-28A, N2525M, Osseo, MN, August 13, 1971

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: August 13, 1971
- Place: Osseo, MN · OSSEO, MN
- Location: 45.1179° N, 93.3992° W: Placed by OpenAirDocs: center of Osseo, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.1179&lon=-93.3992&mi=10
- Phase of flight: [Uncontrolled descent](https://openairdocs.org/ntsb-phases/650) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report May 23, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 163023
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC72AK013
- Page: https://openairdocs.org/ntsb/MKC72AK013

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3833  71/8/13  NR.OSSEO,MINN         ENSTROM F-28A       CR-  1  0  0  MISCELLANEOUS             COMMERCIAL, AGE 33, 3330
        TIME - 2330                    N2525M              PX-  1  0  0  POLICE PATROL             TOTAL HOURS, 342 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         OSSEO,MINN                   LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - CONTINUED VFR FLIGHT INTO ADVERSE WEATHER CONDITIONS
           PILOT IN COMMAND - SPATIAL DISORIENTATION
        FACTOR(S)
           WEATHER - LOW CEILING
           WEATHER - FOG
        WEATHER BRIEFING - BRIEFED BY FLIGHT SERVICE PERSONNEL, BY PHONE
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          OVERCAST                                                 UNKNOWN/NOT REPORTED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          UNKNOWN/NOT REPORTED                                     DRIZZLE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TYPE OF WEATHER CONDITIONS
          FOG                                                      UNKNOWN/NOT REPORTED
        TYPE OF FLIGHT PLAN
          NONE
```

## Aircraft

- Registration: [N2525M](https://openairdocs.org/deregistered/N2525M-1971-10-07), registration cancelled 1971-10-07, S/N 017, built 1968 (OpenAirDocs)
- Reported make and model: ENSTROM F-28A
- Registry model: [Enstrom F-28A](https://openairdocs.org/model/enstrom-f-28a) (registry code 3300406) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Destroyed

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.