IAD71II033

NTSB incident investigation · Boeing 720 · Baltimore, MD · January 12, 1971

Incident · No injuriesClosed
Date
January 12, 1971
Place
Baltimore, MD · BALTIMORE, MD
Injuries
64 uninjured
Damage
Minor damage
Phase of flight
Enroute
Aircraft
N7207UBoeing 720
Status
Completed · report September 23, 1971
Report
Brief approved by the director
Case key
160380

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.

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NTSB brief

NTSB’s brief of the accident, as it was printed: the coded facts, with the probable cause and factors.

----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
4-0002  71/1/12    BALTIMORE,MD        BOEING 720          CR-  0  0  7  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1857                    N7207U              PX-  0  0 57                            52, 21000 TOTAL HOURS,
                                       DAMAGE-MINOR        OT-  0  0  0                            7600 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        CLASSIFIED AS INCIDENT
        OPERATOR - UNITED AIR LINES,INC.
        DEPARTURE POINT             INTENDED DESTINATION
          BALTIMORE,MD                DENVER,COLO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: CLIMB TO CRUISE
           FIRE OR EXPLOSION: IN FLIGHT                             IN FLIGHT: CLIMB TO CRUISE
        PROBABLE CAUSE(S)
           POWERPLANT - COMPRESSOR ASSEMBLY: BLADE,COMPRESSOR ROTOR
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
           MISCELLANEOUS ACTS,CONDITIONS - FIRE IN ENGINE
        FACTOR(S)
           POWERPLANT - MISCELLANEOUS: FOREIGN OBJECT DAMAGE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT
                                  SUSPECTED MECHANICAL DISCREPANCY
        REMARKS- 8TH STAGE COMPRESSOR BLADE FAILED.CAUSED PROGRESSIVE NR 1 ENG FAILURE.FIRE BOTTLE INOP.LND SAFELY.

Aircraft

Registration
N7207U
Reported as
Boeing 720
Category
Airplane
Engine
turbo jet
Damage
Minor damage

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.