# NTSB MIA77DA022: Piper PA-23, N4573P, Missing Aircraft, December 28, 1976

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: December 28, 1976
- Place: Missing Aircraft · MISSING AIRCRAFT, UN
- Phase of flight: [Unknown](https://openairdocs.org/ntsb-phases/990) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 6 fatal
- Status: Completed, report January 17, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 157106
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA77DA022
- Page: https://openairdocs.org/ntsb/MIA77DA022

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4039  76/12/28   MISSING AIRCRAFT    PIPER PA-23         CR-  1  0  0  COMMERCIAL                COMMERCIAL, AGE UNK/NR,
        TIME - UNK/NR                  N4573P              PX-  5  0  0  AIR TAXI-PASSG            1321 TOTAL HOURS, 1000 IN
                                       DAMAGE-DESTROYED    OT-  0  0  0                            TYPE, INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          ANGUILLA ISLAND,WI          BEEF ISLAND,WI
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISSING AIRCRAFT,NOT RECOVERED                           UNKNOWN/NOT REPORTED
        PROBABLE CAUSE(S)
           MISCELLANEOUS - UNDETERMINED
        FACTOR(S)
           WEATHER - TURBULENCE, ASSOCIATED W/CLOUDS AND/OR THUNDERSTORMS
           WEATHER - THUNDERSTORM ACTIVITY
        WEATHER BRIEFING - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          UNKNOWN/NOT REPORTED                                     UNKNOWN/NOT REPORTED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          UNKNOWN/NOT REPORTED                                     UNKNOWN/NOT REPORTED
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TYPE OF WEATHER CONDITIONS
          UNKNOWN/NOT REPORTED                                     IFR
        TYPE OF FLIGHT PLAN
          NONE
        REMARKS- DAMAGE AND INJURY INDEX PRESUMED.
```

## Aircraft

- Registration: [N4573P](https://openairdocs.org/deregistered/N4573P-2012-07-24), registration cancelled 2012-07-24, S/N 27-82, built 1960 (OpenAirDocs)
- Reported make and model: PIPER PA-23
- Registry model: [Piper PA-23-250](https://openairdocs.org/model/piper-pa-23-250) (registry code 7102308) (OpenAirDocs)
- Registry engine: [Lycoming 0-540 series](https://openairdocs.org/engine/lycoming-0-540-series) (registry code 41532, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed

## 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 19761228042539A](https://openairdocs.org/incident/19761228042539A), Dec 28, 1976: Piper PA23250, Missing Aircraf, Destroyed, 5 fatal. Damage and injury index presumed.

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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