# NTSB CHI74FEI04: Thorp T-18, N702MS, Marlboro, OH, July 22, 1973

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: July 22, 1973
- Place: Marlboro, OH · MARLBORO, OH
- Location: 40.9506° N, 81.2169° W: Placed by OpenAirDocs: center of Marlboro, OH, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.9506&lon=-81.2169&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report November 8, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 188928
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI74FEI04
- Page: https://openairdocs.org/ntsb/CHI74FEI04

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2935  73/7/22    MARLBORO,OHIO       THORP T-18          CR-  1  0  0  NONCOMMERCIAL             PRIVATE, AGE 56, 457
        TIME - 1630                    N702MS              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 76 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - SUNSET STRIP
        DEPARTURE POINT             INTENDED DESTINATION
          MARLBORO,OHIO               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           STALL: SPIN                                              TAKEOFF: INITIAL CLIMB
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
        REMARKS- NO EVIDENCE OF CTL SYSTEM OR PWR PLANT MALFUNCTION FOUND.
```

## Aircraft

- Registration: [N702MS](https://openairdocs.org/deregistered/N702MS-1973-10-02), registration cancelled 1973-10-02, S/N 245B, built 1972 (OpenAirDocs)
- Reported make and model: THORP T-18
- Registry model: [Simkanin THORP T-18](https://openairdocs.org/model/simkanin-thorp-t-18) (registry code 89510BD) (OpenAirDocs)
- Category: Airplane, amateur-built
- Engines: reciprocating
- Damage: Destroyed
- Airport: Sunset Strip

## 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 19730722022789A](https://openairdocs.org/incident/19730722022789A), Jul 22, 1973: Amtr 8951041, Marlboro, OH, Destroyed. No evidence of ctl system or pwr plant malfunction found.

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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