# NTSB DEN71AD013: Douglas DC-8, N8022U, Denver, CO, September 21, 1970

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: September 21, 1970
- 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: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious, 6 minor, 111 uninjured
- Status: Completed, report January 20, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 152440
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN71AD013
- Page: https://openairdocs.org/ntsb/DEN71AD013

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
1-0034  70/9/21  NR.DENVER,COLO        DOUGLAS DC-8        CR-  0  1  7  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1921                    N8022U              PX-  0  1110                            48, 17501 TOTAL HOURS,
                                       DAMAGE-MINOR        OT-  0  0  0                            1134 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        OPERATOR - UNITED AIR LINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          SAN FRANCISCO,CALIF        DENVER,COLO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           TURBULENCE                                               IN FLIGHT: DESCENDING
        PROBABLE CAUSE(S)
           WEATHER - TURBULENCE, ASSOCIATED W/CLOUDS AND/OR THUNDERSTORMS
           MISCELLANEOUS ACTS,CONDITIONS - SEAT BELT NOT FASTENED
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEAT BELT SIGN ON
        WEATHER BRIEFING - COMPANY DISPATCH
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          UNKNOWN/NOT REPORTED                                     UNKNOWN/NOT REPORTED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TYPE OF WEATHER CONDITIONS
          NONE                                                     VFR
        TYPE OF FLIGHT PLAN
          IFR
        REMARKS- FLEW INTO ISOLATED CUMULUS. WASNT DEPICTED BY ACFT OR GRND RADAR.
```

## Aircraft

- Registration: [N8022U](https://openairdocs.org/deregistered/N8022U-2013-09-17), registration cancelled 2013-09-17, S/N 45595, built 1960 (OpenAirDocs)
- Reported make and model: DOUGLAS DC-8
- Registry model: [Douglas DC-8-21](https://openairdocs.org/model/douglas-dc-8-21) (registry code 3021906) (OpenAirDocs)
- Registry engine: [Pratt & Whitney JT4A-3&5SER](https://openairdocs.org/engine/pratt-whitney-jt4a-3-5ser) (registry code 52037, turbo-jet) (OpenAirDocs)
- Category: Airplane
- Engines: turbo jet
- Damage: Minor damage

## Other investigations on N8022U (1)

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.

- [NTSB NYC70I0041](https://openairdocs.org/ntsb/NYC70I0041), Oct 9, 1969: Douglas DC-8 (N8022U), Jamaica, NY, incident, no 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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