# NTSB DEN78FI014: Boeing 747, N4727U, Denver, CO, October 12, 1977

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: October 12, 1977
- Place: Denver, CO · DENVER, CO
- Location: 39.7392° N, 104.9847° W: Placed by OpenAirDocs: center of Denver, CO, within about 7 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.7392&lon=-104.9847&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 164 uninjured
- Status: Completed, report April 4, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 144272
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN78FI014
- Page: https://openairdocs.org/ntsb/DEN78FI014

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0024  77/10/12   DENVER,CO           BOEING 747          CR-  0  0 14  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1042                    N4727U              PX-  0  0150                            UNK/NR, UNK/NR TOTAL
                                       DAMAGE-NONE         OT-  0  0  0                            HOURS, UNK/NR IN TYPE,
                                                                                                   INSTRUMENT RATED.
        CLASSIFIED AS INCIDENT
        NAME OF AIRPORT - STAPLETON INTL
        OPERATOR - UNITED AIR LINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          DENVER,CO                   LOS ANGELES,CA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            TAKEOFF: RUN
        PROBABLE CAUSE(S)
           PERSONNEL - TRAFFIC CONTROL PERSONNEL: INADEQUATE SPACING OF AIRCRAFT
        FACTOR(S)
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT
        REMARKS- GC CLEARED A BEECH DUKE TO CROSS ACTIVE 3SEC BFR FLT CLEARED FOR TKOF. DC-10 ALSO LATE RPT ON FNL.
```

## Aircraft

- Registration: [N4727U](https://openairdocs.org/deregistered/N4727U-1998-02-17), registration cancelled 1998-02-17, S/N 19883 (OpenAirDocs)
- Reported make and model: BOEING 747
- Registry model: [Boeing 747-122](https://openairdocs.org/model/boeing-747-122) (registry code 1384872) (OpenAirDocs)
- Category: Airplane
- Engines: turbo fan
- Damage: No damage
- Airport: Stapleton 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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