# NTSB SEA71AS024: Mooney M20C, Seattle, WA, November 1, 1970

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: November 1, 1970
- Place: Seattle, WA · SEATTLE, WA
- Location: 47.6062° N, 122.3321° W: Placed by OpenAirDocs: center of Seattle, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=47.6062&lon=-122.3321&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 4 fatal, 2 uninjured
- Status: Completed, report July 19, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 158527
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA71AS024
- Page: https://openairdocs.org/ntsb/SEA71AS024

## NTSB brief (aircraft 2)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3914   70/11/1   SEATTLE,WASH        CESSNA 182N         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 53, 1135
        TIME - 1421                    N92711              PX-  0  0  1  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 43 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  4  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - BOEING
        DEPARTURE POINT             INTENDED DESTINATION
          EASTSOUND,WASH              SEATTLE,WASH
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  LANDING: TRAFFIC PATTERN-CIRCLING
        PROBABLE CAUSE(S)
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - CONGESTED TRAFFIC-PATTERN
           PERSONNEL - TRAFFIC CONTROL PERSONNEL: FAILURE TO ADVISE OF OTHER TRAFFIC
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-FOREIGN GEN.AV.
          CONTROLLING AGENCY - TOWER                               RADAR CTL/SURVEILLANCE - UNKNOWN/NOT REPORTED
          TRAFFIC ADVISORY ISSUED - NONE                           CONTROLLED/UNCONTROLLED AIRPORT - CONTROLLED AIRPORT
          CONTROL ZONE/AREA - YES                                  HORIZONTAL COLLISION ANGLE-DEGREES -   37
          EVASIVE ACTION TAKEN - NO                                ANTI-COLLISION LIGHTS - INSTALLED,OPERATION UNKNOWN
        REMARKS- CF-DBR NOT OBS BY TWR PERSONNEL UNTIL ACFT ABOUT MIDFIELD.N92711 HORIZ STAB SLASHED.LNDD OK.
```

## NTSB brief (aircraft 1)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3914   70/11/1   SEATTLE,WASH        MOONEY M20C         CR-  1  0  0  NONCOMMERCIAL             CERTIFICATE OTHER, AGE
        TIME - 1421                    CF-DBR              PX-  3  0  0  PLEASURE/PERSONAL TRANSP  25, 238 TOTAL HOURS, 217
                                       DAMAGE-DESTROYED    OT-  0  0  2                            IN TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - BOEING
        DEPARTURE POINT             INTENDED DESTINATION
          VANCOUVER,BC,CAN            SEATTLE,WASH
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  LANDING: TRAFFIC PATTERN-CIRCLING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OTHER AIRCRAFT
        FACTOR(S)
           PILOT IN COMMAND - FAILED TO FOLLOW APPROVED PROCEDURES,DIRECTIVES,ETC.
           MISCELLANEOUS ACTS,CONDITIONS - CONGESTED TRAFFIC-PATTERN
           PERSONNEL - TRAFFIC CONTROL PERSONNEL: FAILURE TO ADVISE OF OTHER TRAFFIC
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-FOREIGN GEN.AV.
          CONTROLLING AGENCY - TOWER                               RADAR CTL/SURVEILLANCE - UNKNOWN/NOT REPORTED
          TRAFFIC ADVISORY ISSUED - BY LOCAL CONTROL               CONTROLLED/UNCONTROLLED AIRPORT - CONTROLLED AIRPORT
          CONTROL ZONE/AREA - YES                                  HORIZONTAL COLLISION ANGLE-DEGREES -   37
          EVASIVE ACTION TAKEN - UNKNOWN/NOT REPORTED              ANTI-COLLISION LIGHTS - INSTALLED,OPERATION UNKNOWN
        REMARKS- CF-DBR OBS TO RAPIDLY OVERTAKE N92711 ON DOWNWIND LEG.R OUTER WG PANEL OF CF-DBR SEPARATED IN FLT.
```

## Aircraft 1

- Registration: CF-DBR (not matched to a registry record)
- Reported make and model: MOONEY M20C
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Boeing

## Aircraft 2

- Registration: N92711 (not matched to a registry record)
- Reported make and model: CESSNA 182N
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Boeing

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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From OpenAirDocs.org, an independent open copy of NTSB and FAA data. The NTSB's own report is the official record of an investigation.