# NTSB FTW74AF009: Aero Comdr 690A, N333CA, Alex, OK, August 22, 1973

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: August 22, 1973
- Place: Alex, OK · ALEX, OK
- Location: 34.9228° N, 97.7763° W: Placed by OpenAirDocs: center of Alex, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.9228&lon=-97.7763&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report March 5, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 188828
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW74AF009
- Page: https://openairdocs.org/ntsb/FTW74AF009

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3972  73/8/22    ALEX,OKLA           AERO COMDR 690A     CR-  2  0  0  MISCELLANEOUS             COMMERCIAL, AGE 53, 8950
        TIME - 1420                    N333CA              PX-  0  0  0  TEST                      TOTAL HOURS, 1944 IN
                                       DAMAGE-DESTROYED    OT-  0  0  0                            TYPE, INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          BETHANY,OKLA                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           SYSTEMS - ELECTRICAL SYSTEM: SWITCHES
           SYSTEMS - AIR CONDITION,HEATING AND PRESSURIZATION: PRESSURIZATION CONTROL AND INDICATING SYSTEM
           COPILOT - LACK OF FAMILIARITY WITH AIRCRAFT
           COPILOT - FAILED TO USE OR INCORRECTLY USED MISC.EQUIPMENT
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
           MISCELLANEOUS ACTS,CONDITIONS - EXPLOSIVE DECOMPRESSION
        FACTOR(S)
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
         FIRE AFTER IMPACT
        REMARKS- PROD TEST FLT.PLT R SEAT.C/P SLCTD UNCOVERED PRESSURIZATION DUMP SWITCH.DIF PANEL PSN 690 MODEL.
```

## Aircraft

- Registration: [N333CA](https://openairdocs.org/aircraft/N333CA), registered now, S/N 093904 (OpenAirDocs)
- Reported make and model: AERO COMDR 690A
- Registry model: [Aerovodochody L-29 DELFIN](https://openairdocs.org/model/aerovodochody-l-29-delfin) (registry code 0564310) (OpenAirDocs)
- Registry engine: [Motorlet M-701C](https://openairdocs.org/engine/motorlet-m-701c) (registry code 46000, turbo-jet) (OpenAirDocs)
- Category: Airplane
- Engines: turbo prop
- 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 19730822035929A](https://openairdocs.org/incident/19730822035929A), Aug 22, 1973: Rkwell 690, Alex, OK, Destroyed. Prod test flt. Plt r seat.c/p slctd uncovered pressurization dump switch. Dif panel psn 690 model.

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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