# NTSB DCA71A0010: Douglas DC-9, N9345, Duarte, CA, June 6, 1971

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: June 6, 1971
- Place: Duarte, CA · DUARTE, CA
- Location: 34.1609° N, 117.9505° W: Placed by OpenAirDocs: center of Duarte, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.1609&lon=-117.9505&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 50 fatal, 1 uninjured
- Status: Completed, report November 30, 1972
- Safety recommendations: Yes
- NTSB case key (mKey): 79719
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DCA71A0010
- Board report AAR7226 (PDF): https://www.ntsb.gov/investigations/AccidentReports/Reports/AAR7226.pdf
- Page: https://openairdocs.org/ntsb/DCA71A0010

## NTSB brief (aircraft 2)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0005   71/6/6  NR.DUARTE,CALIF       MCDNNL-DOUG F-4B    CR-  1  0  1  MISCELLANEOUS             COMMERCIAL, FL.INSTR.,
        TIME - 1711                    USMC458             PX-  0  0  0  OTHER PUBLIC              AGE 27, 840 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT- 49  0  0                            170 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          MTN HOME AFB,CALIF          MCAS EL TORO,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OTHER AIRCRAFT
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - US AIR CARRIER-US MILITARY
          RADAR CTL/SURVEILLANCE - NOT UNDER RADAR CONTACT         CONVERGENCE ANGLE-DEGREES -  37
          HORIZONTAL COLLISION ANGLE-DEGREES -   104               EVASIVE ACTION TAKEN - YES
         FIRE AFTER IMPACT
        REMARKS- OTR C/F-CREW OF USMC458 FAILED TO REQ RARAD SVC,TINOP.OTR C/F INCL VERY HIGH CLOSURE RATE BTN ACFT
```

## NTSB brief (aircraft 1)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0005   71/6/6  NR.DUARTE,CALIF       DOUGLAS DC-9        CR-  5  0  0  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1711                    N9345               PX- 44  0  0                            50, 15490 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  1  0  1                            2562 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        OPERATOR - HUGHES AIRWEST
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          LOS ANGELES,CALIF           SEATTLE,WASH                 YAKIMA,WASH
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  IN FLIGHT: CLIMB TO CRUISE
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OTHER AIRCRAFT
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - US AIR CARRIER-US MILITARY
          CONTROLLING AGENCY - CENTER EN-ROUTE                     RADAR CTL/SURVEILLANCE - UNDER RADAR CONTACT
          TRAFFIC ADVISORY ISSUED - NONE                           CONVERGENCE ANGLE-DEGREES -  39
          HORIZONTAL COLLISION ANGLE-DEGREES -   104               EVASIVE ACTION TAKEN - NO
         FIRE AFTER IMPACT
        REMARKS- BOTH CREWS HAD ONLY MRGL CPBLTY TO SEE AND AVOID.OTR C/F -ATC SYS LTD,PRECLUDED EFF IFR/VFR SEPN.
```

## Aircraft 1

- Registration: [N9345](https://openairdocs.org/deregistered/N9345-1971-12-03), registration cancelled 1971-12-03, S/N 47441 (OpenAirDocs)
- Reported make and model: DOUGLAS DC-9
- Registry model: [Douglas DC-9-31](https://openairdocs.org/model/douglas-dc-9-31) (registry code 3022065) (OpenAirDocs)
- Category: Airplane
- Engines: turbo fan
- Damage: Destroyed

## Aircraft 2

- Registration: USMC458 (not matched to a registry record)
- Reported make and model: MCDNNL-DOUG F-4B
- Category: Airplane
- Engines: turbo jet
- Damage: Destroyed

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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