# NTSB IAD71II034: Boeing 747, N4710U, Dulles Int Apt, DC, January 17, 1971

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: January 17, 1971
- Place: Dulles Int Apt, DC · DULLES INT APT, DC
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 130 uninjured
- Status: Completed, report July 10, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 160385
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD71II034
- Page: https://openairdocs.org/ntsb/IAD71II034

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0022  71/1/17  NR.DULLES INT APT,DC  BOEING 747          CR-  0  0 15  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1902                    N4710U              PX-  0  0115                            UNK/NR, UNK/NR TOTAL
                                       DAMAGE-MINOR        OT-  0  0  0                            HOURS, UNK/NR IN TYPE,
                                                                                                   INSTRUMENT RATED.
        CLASSIFIED AS INCIDENT
        OPERATOR - UNITED AIR LINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          LOS ANGELES,CALIF           JAMAICA,NY
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           AIRFRAME - FUSELAGE: WINDSHIELDS,WINDOWS,CANOPIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT
                                  SUSPECTED OR KNOWN AIRCRAFT DAMAGE
        REMARKS- PLTS WINDSHIELD CRACKED FOR UNDETERMINED REASON.
```

## Aircraft

- Registration: N4710U (not matched to a registry record)
- Reported make and model: BOEING 747
- Category: Airplane
- Engines: turbo fan
- Damage: Minor damage

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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