# NTSB SEA71AS031: Dehavilland DH125, N36MK, B0ise, ID, December 28, 1970

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: December 28, 1970
- Place: B0ise, ID · B0ISE, ID
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report March 9, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 159567
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA71AS031
- Page: https://openairdocs.org/ntsb/SEA71AS031

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4604  70/12/28 NR.B0ISE,ID           DEHAVILLAND DH125   CR-  2  0  0  NONCOMMERCIAL             ATP,FLIGHT INSTR., AGE
        TIME - 1837                    N36MK               PX-  0  0  0  CORP/EXEC                 56, 16871 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            2183 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          BILLINGS,MONT               BOISE,ID
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: CONTROLLED                  IN FLIGHT: OTHER
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER IFR OPERATION
           PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.
           MISCELLANEOUS ACTS,CONDITIONS - INSTRUMENTS-MISREAD OR FAILED TO READ
         FIRE AFTER IMPACT
        REMARKS- ACFT NE-CLNC,1LS 10L RPT BO OBND-LVG 10000.RPTD LVG ALT DSCNDD BLO MSA 8600FT HIT GND 5690FT MSL.
```

## Aircraft

- Registration: [N36MK](https://openairdocs.org/deregistered/N36MK-1971-02-18), registration cancelled 1971-02-18, S/N 25073, built 1966 (OpenAirDocs)
- Reported make and model: DEHAVILLAND DH125
- Registry model: [Hawker Siddeley DH.125-1A](https://openairdocs.org/model/hawker-siddeley-dh-125-1a) (registry code 4230106) (OpenAirDocs)
- Category: Airplane
- Engines: turbo jet
- Damage: Destroyed

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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From OpenAirDocs.org, an independent open copy of NTSB and FAA data. The NTSB's own report is the official record of an investigation.