FTW74IF077

NTSB incident investigation · Boeing 727 · Sierra Blanca, TX · April 30, 1974

Incident · No injuriesClosed
Date
April 30, 1974
Place
Sierra Blanca, TX · SIERRA BLANCA, TX
Injuries
97 uninjured
Damage
Minor damage
Phase of flight
Enroute
Aircraft
N4736Boeing 727
Status
Completed · report October 24, 1974
Report
Brief approved by the director
Safety recommendations
Yes
Case key
79459

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

On this page

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
----------------------------------------------------------------------------------------------------------------------------
4-0007  74/4/30  NR.SIERRA BLANCA,TEX  BOEING 727          CR-  0  0  8  SCHED DOM PASSG SRV       AIRLINE TRANSPORT, AGE
        TIME - 1710                    N4736               PX-  0  0 89                            53, 13429 TOTAL HOURS,
                                       DAMAGE-MINOR        OT-  0  0  0                            4002 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        CLASSIFIED AS INCIDENT
        OPERATOR - NATIONAL AIRLINES,INC
        DEPARTURE POINT             INTENDED DESTINATION         LAST ENROUTE STOP
          SAN DIEGO,CALIF             MIAMI,FLA                    NEW ORLEANS,LA
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           ENGINE TEARAWAY                                          IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPERLY SERVICED AIRCRAFT (GROUND CREW)
           INSTRUMENTS/EQUIPMENT AND ACCESSORIES - MISCELLANEOUS EQUIPMENT: OTHER
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY SECURED
           MISCELLANEOUS ACTS,CONDITIONS - LEAK/LEAKAGE
           POWERPLANT - MISCELLANEOUS: FOREIGN OBJECT DAMAGE
           POWERPLANT - ENGINE STRUCTURE: MOUNT AND VIBRATION ISOLATORS
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT
                                  SUSPECTED OR KNOWN AIRCRAFT DAMAGE
        REMARKS- FLUID LK FM R FWD LAV TANK DRAIN DONUT PLUG.IMPACT DMG R LDG LT,HUMAN WASTE ON #3 ENG NOSE CONE.

Aircraft

Registration
N4736
Reported as
Boeing 727
Category
Airplane
Engine
turbo fan
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.