# NTSB LAX74IL021: Boeing 720B, N57204, Ontario, CA, September 13, 1973

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: September 13, 1973
- Place: Ontario, CA · ONTARIO, CA
- Location: 34.0633° N, 117.6509° W: Placed by OpenAirDocs: center of Ontario, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.0633&lon=-117.6509&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 7 uninjured
- Status: Completed, report March 18, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 187733
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX74IL021
- Page: https://openairdocs.org/ntsb/LAX74IL021

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0029  73/9/13    ONTARIO,CALIF       BOEING 720B         CR-  0  0  7  FERRY                     AIRLINE TRANSPORT, AGE
        TIME - 0747                    N57204              PX-  0  0  0                            44, UNK/NR TOTAL HOURS,
                                       DAMAGE-MINOR        OT-  0  0  0                            3055 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        CLASSIFIED AS INCIDENT
        NAME OF AIRPORT - ONTARIO INTL
        OPERATOR - CONTINENTAL AIR LINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          LOS ANGELES,CALIF           ONTARIO,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: WIRES/POLES                               LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           COPILOT - IMPROPER IFR OPERATION
           COPILOT - MISJUDGED ALTITUDE AND CLEARANCE
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
        FACTOR(S)
           WEATHER - LOW CEILING
           WEATHER - FOG
           TERRAIN - HIGH OBSTRUCTIONS
        WEATHER BRIEFING - BRIEFING RECEIVED-METHOD UNKNOWN
        WEATHER FORECAST - UNKNOWN/NOT REPORTED
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          OVERCAST                                                  400
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          1/2 MILE OR LESS                                         DRIZZLE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TEMPERATURE-F
          FOG                                                       62
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          180                                                       5
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          IFR                                                      IFR
        REMARKS- 2ND LOC/VOR RWY 25 APCH.HIT WIRES 3.5MI SHORT OF RWY.
```

## Aircraft

- Registration: N57204 (not matched to a registry record)
- Reported make and model: BOEING 720B
- Category: Airplane
- Engines: turbo jet
- Damage: Minor damage
- Airport: Ontario Intl

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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