# NTSB MIA72IM019: Douglas DC-8, N8034U, No.Atlantic Ocean (Atlantic Ocean), August 21, 1971

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: August 21, 1971
- Place: No.Atlantic Ocean (Atlantic Ocean) · NO.ATLANTIC OCEAN, AO
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 156 uninjured
- Status: Completed, report August 16, 1972
- Report: Brief approved by the director
- NTSB case key (mKey): 163670
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA72IM019
- Page: https://openairdocs.org/ntsb/MIA72IM019

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0046  71/8/21    NO.ATLANTIC OCEAN   DOUGLAS DC-8        CR-  0  0  7  NS/CTR REVENUE PASSG INTL CERTIFICATE UNKNOWN, AGE
        TIME - 1340                    N8034U              PX-  0  0149                            UNK/NR, UNK/NR TOTAL
                                       DAMAGE-NONE         OT-  0  0  0                            HOURS, UNK/NR IN TYPE,
                                                                                                   UNK/NR INSTRUMENT RATED.
        CLASSIFIED AS INCIDENT
        OPERATOR - UNITED AIR LINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          FREEPORT,BAHAMAS            MIAMI,FLA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            IN FLIGHT: DESCENDING
        PROBABLE CAUSE(S)
           SYSTEMS - FLIGHT CONTROL SYSTEMS: HORIZONTAL STABILIZER DRIVE SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - SHEARED
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        REMARKS- STABILIZER DRIVE SPROCKET SHEARED ON SPROCKET ASSY. STAB JAMMED 2 DEG NOSE UP ATTITUDE.
```

## Aircraft

- Registration: N8034U (not matched to a registry record)
- Reported make and model: DOUGLAS DC-8
- Category: Airplane
- Engines: turbo fan
- Damage: No damage

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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