# NTSB CHI73AC006: Piper PA-31, N212AD, Missing Aircraft, July 21, 1972

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: July 21, 1972
- Place: Missing Aircraft · MISSING AIRCRAFT, UN
- Phase of flight: [Unknown](https://openairdocs.org/ntsb-phases/990) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report January 9, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 167669
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI73AC006
- Page: https://openairdocs.org/ntsb/CHI73AC006

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1082  72/7/21    MISSING AIRCRAFT    PIPER PA-31         CR-  1  0  0  NONCOMMERCIAL             PRIVATE, AGE 45, 4100
        TIME - 0810                    N212AD              PX-  0  0  0  BUSINESS                  TOTAL HOURS, UNK/NR IN
                                       DAMAGE-DESTROYED    OT-  0  0  0                            TYPE, INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          DETROIT,MICH                MILWAUKEE,WIS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISSING AIRCRAFT,NOT RECOVERED                           UNKNOWN/NOT REPORTED
        PROBABLE CAUSE(S)
           MISCELLANEOUS - UNDETERMINED
        REMARKS- ACFT BELIEVED TO BE IN LAKE MICHIGAN. ACFT DMG AND INJURY INDEX PRESUMED.
```

## Aircraft

- Registration: [N212AD](https://openairdocs.org/deregistered/N212AD-1973-05-30), registration cancelled 1973-05-30, S/N 31-160 (OpenAirDocs)
- Reported make and model: PIPER PA-31
- Registry model: [Piper PA-31](https://openairdocs.org/model/piper-pa-31) (registry code 7103103) (OpenAirDocs)
- Category: Airplane
- 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.

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