# NTSB SEA71AS025: Beech S35, N11SM, Missing Aircraft, August 7, 1970

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: August 7, 1970
- 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 March 18, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 113713
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA71AS025
- Page: https://openairdocs.org/ntsb/SEA71AS025

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2438   70/8/7    MISSING AIRCRAFT    BEECH S35           CR-  1  0  0  NONCOMMERCIAL             PRIVATE, AGE 56, 900
        TIME - UNK/NR                  N11SM               PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 80 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          ASTORIA,OREG               UNKNOWN/NOT REPORTED
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISSING AIRCRAFT,NOT RECOVERED                           UNKNOWN/NOT REPORTED
        PROBABLE CAUSE(S)
           MISCELLANEOUS - UNDETERMINED
        REMARKS- DATE,ACFT DMG AND INJURY INDEX PRESUMED.
```

## Aircraft

- Registration: [N11SM](https://openairdocs.org/deregistered/N11SM-2009-06-26), registration cancelled 2009-06-26, S/N D-7669, built 1964 (OpenAirDocs)
- Reported make and model: BEECH S35
- Registry model: [Beech S35](https://openairdocs.org/model/beech-s35) (registry code 1151532) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (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; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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