# NTSB CHI78IA061: Lockheed L-1011, N701DA, Chicago, IL, August 31, 1978

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: August 31, 1978
- 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: 139 uninjured
- Status: Completed, report February 26, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 138961
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI78IA061
- Page: https://openairdocs.org/ntsb/CHI78IA061

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0025  78/8/31  NR.CHICAGO,IL         LOCKHEED L-1011     CR-  0  0 12  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 0630                    N701DA              PX-  0  0127                            UNK/NR, UNK/NR TOTAL
                                       DAMAGE-NONE         OT-  0  0  0                            HOURS, UNK/NR IN TYPE,
                                                                                                   INSTRUMENT RATED.
        CLASSIFIED AS INCIDENT
        OPERATOR - DELTA AIR LINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          ATLANTA,GA                  CHICAGO,IL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           PERSONNEL - OPERATIONAL SUPERVISORY PERSONNEL: FAILURE TO PROVIDE ADEQ.DIRECTIVES,MANUAL,EQUIPMENT
        FACTOR(S)
           SYSTEMS - AIR CONDITION,HEATING AND PRESSURIZATION: PRESSURIZATION CONTROL AND INDICATING SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - PRESSURE,NONE
        REMARKS- AIRCRAFT LOST CABIN PRESSURIZATION AT FL350.NO MALFUNCTION FOUND IN SYSTEM.
```

## Aircraft

- Registration: N701DA (not matched to a registry record)
- Reported make and model: LOCKHEED L-1011
- 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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