# NTSB LAX71IL042: Boeing 747, N4704U, Los Angeles, CA, December 29, 1970

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: December 29, 1970
- Place: Los Angeles, CA · LOS ANGELES, CA
- Location: 34.0522° N, 118.2437° W: Placed by OpenAirDocs: center of Los Angeles, CA, within about 12 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.0522&lon=-118.2437&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed, report April 30, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 159505
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX71IL042
- Page: https://openairdocs.org/ntsb/LAX71IL042

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0071  70/12/29   LOS ANGELES,CALIF   BOEING 747          CR-  0  0  5  TRAINING                  CERTIFICATE UNKNOWN, AGE
        TIME - 1922                    N4704U              PX-  0  0  0                            UNK/NR, UNK/NR TOTAL
                                       DAMAGE-MINOR        OT-  0  0  0                            HOURS, UNK/NR IN TYPE,
                                                                                                   UNK/NR INSTRUMENT RATED.
        CLASSIFIED AS INCIDENT
        NAME OF AIRPORT - LOS ANGELES INTL
        OPERATOR - UNITED AIR LINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          LOS ANGELES,CALIF           LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           AIRFRAME - FLIGHT CONTROL SURFACES: FLAP ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        REMARKS- NR 3 AND 4 LDG FLAP TRAILING EDGE FAIRINGS SEPARATED.ONE HIT HOUSE.BOEING SERVICE BULLETINS COVER.
```

## Aircraft

- Registration: N4704U (not matched to a registry record)
- Reported make and model: BOEING 747
- Category: Airplane
- Engines: turbo fan
- Damage: Minor damage
- Airport: Los Angeles 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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