# NTSB LAX73FUA40: Waco UPF-7, N30141, Santa Ana, CA, April 29, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 29, 1973
- Place: Santa Ana, CA · SANTA ANA, CA
- Location: 33.7368° N, 117.8829° W: Placed by OpenAirDocs: center of Santa Ana, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.7368&lon=-117.8829&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report August 20, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 190122
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX73FUA40
- Page: https://openairdocs.org/ntsb/LAX73FUA40

## NTSB brief (aircraft 2)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1812  73/4/29    SANTA ANA,CALIF     CESSNA 172          CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 26, 146
        TIME - 1414                    N78084              PX-  0  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 65 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  3                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - ORANGE COUNTY
        DEPARTURE POINT             INTENDED DESTINATION
          SANTA ANA,CALIF             LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH ON GROUND                  STATIC: IDLING ENGINE(S)
        PROBABLE CAUSE(S)
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT
        REMARKS- N30141 ON SIGHTSEEING FLT.PLT STATED 13K TAILWIND CONTRIBUTED TO NOSE OVER ONTO N78084.
```

## NTSB brief (aircraft 1)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1812  73/4/29    SANTA ANA,CALIF     WACO UPF-7          CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 41, 11875
        TIME - 1414                    N30141              PX-  0  0  2  OTHER                     TOTAL HOURS, 1720 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  1                            TYPE, INSTRUMENT RATED.
        NAME OF AIRPORT - ORANGE COUNTY
        DEPARTURE POINT             INTENDED DESTINATION
          SANTA ANA,CALIF             LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH ON GROUND                  TAXI: TO TAKEOFF
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OTHER AIRCRAFT
           PILOT IN COMMAND - MISJUDGED CLEARANCE
        FACTOR(S)
           WEATHER - UNFAVORABLE WIND CONDITIONS
        WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  RELATIVE BEARING OF WIND
          HAZE                                                     TAIL WIND 158-202 DEGREES
        TEMPERATURE-F                                            WIND DIRECTION-DEGREES
           76                                                      240
        WIND VELOCITY-KNOTS                                      TYPE OF WEATHER CONDITIONS
           13                                                      VFR
        TYPE OF FLIGHT PLAN
          NONE
        REMARKS- N30141 FOLLOWED N78084.TEMPORARILY LOST SIGHT OF N78084 HOLDING ON TWY.N30141 OVERTURNED ON N78084
```

## Aircraft 1

- Registration: [N30141](https://openairdocs.org/deregistered/N30141-2022-01-08), registration cancelled 2022-01-08, S/N 5538, built 1940 (OpenAirDocs)
- Reported make and model: WACO UPF-7
- Registry model: [Waco UPF-7](https://openairdocs.org/model/waco-upf-7) (registry code 9601302) (OpenAirDocs)
- Registry engine: [Continental W670 series](https://openairdocs.org/engine/continental-w670-series) (registry code 17018, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Orange County

## Aircraft 2

- Registration: [N78084](https://openairdocs.org/deregistered/N78084-1973-11-15), registration cancelled 1973-11-15, S/N 17257474 (OpenAirDocs)
- Reported make and model: CESSNA 172
- Registry model: [Cessna 172K](https://openairdocs.org/model/cessna-172k) (registry code 2072430) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Orange County

## FAA reports on this event (2)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19730429015361A](https://openairdocs.org/incident/19730429015361A), Apr 29, 1973: Waco UPF7, Santa Ana, CA, Substantial damage. N30141 followed N78084.temporarily lost sight of N78084 holding on twy.N30141 overturned on N78084
- [Accident 19730429015362A](https://openairdocs.org/incident/19730429015362A), Apr 29, 1973: Cessna 172D, Santa Ana, CA, Substantial damage. N30141 on sightseeing flt. Plt stated 13K tailwind contributed to nose over onto N78084.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.