# NTSB DEN80IA050: Douglas DC-10, N1802U, Chicago, IL, July 24, 1980

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: July 24, 1980
- Place: Chicago, IL · CHICAGO, IL
- Location: 41.8500° N, 87.6501° W: Placed by OpenAirDocs: center of Chicago, IL, within about 9 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.8500&lon=-87.6501&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report August 18, 1980
- Report: Brief approved by the director
- NTSB case key (mKey): 129357
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN80IA050
- Page: https://openairdocs.org/ntsb/DEN80IA050

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0006  80/7/24    CHICAGO,IL          DOUGLAS DC-10       CR-  0  0  3  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1310                    N1802U              PX-  0  0  0                            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
          CHICAGO,IL                  DENVER,CO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           AIRFRAME FAILURE: IN FLIGHT                              IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           SYSTEMS - FLIGHT CONTROL SYSTEMS: HORIZONTAL STABILIZER DRIVE SYSTEM
           SYSTEMS - HYDRAULIC SYSTEM: HYDRAULIC MOTORS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - LEAK/LEAKAGE
           MISCELLANEOUS ACTS,CONDITIONS - HYDRAULIC FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - UNDER TORQUED
        REMARKS- LOST NO 3 HYD SYS.2 ADJ BOLTS,FAILED IN 2 HOR STAB TRIM MOTORS,MR27448.SOME OTR BOLTS UNDERTORQUED
```

## Aircraft

- Registration: N1802U (not matched to a registry record)
- Reported make and model: DOUGLAS DC-10
- 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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