National Transportation Safety Board Aviation Incident Final Report
Location: LAS CRUCES, NM Incident Number: LAX85IA206
Date & Time: 04/16/1985, 1137 MST
Registration: N718AA
Aircraft: BOEING 727-227
Aircraft Damage: Minor Defining Event: Injuries: 89 None Flight Conducted Under: Part 121: Air Carrier - Scheduled
Analysis
WHILE CRUISING AT FLT LEVEL 350 IN CLEAR SMOOTH AIR, A LOUD NOISE WAS HEARD, ACCOMPANIED BY A SEVERE JOLT ON THE RIGHT SIDE OF THE CABIN, AS THE NUMBER 3 END SEPARATED FROM ITS MOUNTS. SUBSEQUENT INVESTIGATION DISCLOSED THAT THE FORWARD LAVATORY WAS LEAKING DEODORANT FLUID AND WATER. DEODORANT STAINS EXISTED ALONG THE RIGHT SIDE OF THE FUSELAGE, & WERE SUBSEQUENTLY IDENTIFIED ON THE NUMBER 3 ENGINE NOSE COWL & INLET NOSE CONE. ALL BUT 6 OF THE FIRST STAGE FAN BLADES WERE RECOVERED AT THE ENG IMPACT SITE, & THESE 6 BLADES WERE LOCATED WITHIN A 180 DEGREE SEGMENT OF THE FAN. LEAKAGE OF THE LAVATORY WASTE DRAIN VALVE WAS THE RESULT OF A DAMAGED 'O' RING SEAL. LEAKAGE OF THE DUMP VALVE WAS THE RESULT OF DISBONDING OF A RUBBER BOOT ON ITS SHAFT.
Probable Cause and Findings
The National Transportation Safety Board determines the probable cause(s) of this incident to be:
Findings
Occurrence #1: AIRFRAME/COMPONENT/SYSTEM FAILURE/MALFUNCTION Phase of Operation: CRUISE - NORMAL
Findings 1. (C) WATER AND WASTE SYSTEM - LEAK 2. (F) MAINTENANCE,SERVICE BULLETIN/LETTER - NOT ISSUED - MANUFACTURER 3. (F) INSUFFICIENT STANDARDS/REQUIREMENTS,MANUFACTURER - MANUFACTURER 4. (F) FLUID,WATER - FROZEN 5. (F) WEATHER CONDITION - TEMPERATURE EXTREMES ---------
Occurrence #2: ENGINE TEARAWAY Phase of Operation: CRUISE - NORMAL
Findings 6. (F) ENGINE ASSEMBLY - SEPARATION 7. (F) ENGINE INSTALLATION,SUSPENSION MOUNTS - OVERLOAD
Factual Information
Pilot Information Certificate: Airline Transport Age: 49, Male Airplane Rating(s): Multi-engine Land Seat Occupied: Left Other Aircraft Rating(s): None Restraint Used: Seatbelt, Shoulder harness Instrument Rating(s): Airplane Second Pilot Present: Yes Instructor Rating(s): None Toxicology Performed: No Medical Certification: Class 1 Valid Medical--w/ waivers/lim. Last FAA Medical Exam: 11/19/1984 Occupational Pilot: Last Flight Review or Equivalent: Flight Time: 12470 hours (Total, all aircraft), 6762 hours (Total, this make and model), 124 hours (Last 90 days, all aircraft), 3 hours (Last 24 hours, all aircraft)
Aircraft and Owner/Operator Information Aircraft Make: BOEING Registration: N718AA Model/Series: 727-227 727-227 Aircraft Category: Airplane Year of Manufacture: Amateur Built: No Airworthiness Certificate: Transport Serial Number: 20611 Landing Gear Type: Retractable - Tricycle Seats: 162 Date/Type of Last Inspection: 04/15/1985, AAIP Certified Max Gross Wt.: 178000 lbs Time Since Last Inspection: 5 Hours Engines: 3 Turbo Fan Airframe Total Time: 36704 Hours Engine Manufacturer: P&W ELT: Not installed Engine Model/Series: JT8D-9A Registered Owner: AMERICAN AIRLINES, INC. Rated Power: 14500 lbs Operator: AMERICAN AIRLINES, INC. Operating Certificate(s) Held: Flag carrier (121)
Meteorological Information and Flight Plan Conditions at Accident Site: Visual Conditions Condition of Light: Day Observation Facility, Elevation: DMN, 4309 ft msl Distance from Accident Site: 30 Nautical Miles Observation Time: 1150 MST Direction from Accident Site: 272° Lowest Cloud Condition: Scattered / 8000 ft agl Visibility 60 Miles Lowest Ceiling: Broken / 12000 ft agl Visibility (RVR): 0 ft Wind Speed/Gusts: 6 knots / Turbulence Type Forecast/Actual: / Wind Direction: 230° Turbulence Severity Forecast/Actual: / Altimeter Setting: 30 inches Hg Temperature/Dew Point: 28°C / -2°C Precipitation and Obscuration: Departure Point: DALLAS-FT WORTH, TX (DFW) Type of Flight Plan Filed: IFR Destination: SAN DIEGO, CA (SAN) Type of Clearance: IFR Departure Time: 1025 MST Type of Airspace: Class E
Airport Information Airport: LAS CRUCES (LRU) Runway Surface Type: Airport Elevation: 0 ft Runway Surface Condition: Runway Used: 0 IFR Approach: None Runway Length/Width: VFR Approach/Landing: None
Wreckage and Impact Information Crew Injuries: 8 None Aircraft Damage: Minor Passenger Injuries: 81 None Aircraft Fire: None Ground Injuries: N/A Aircraft Explosion: None Total Injuries: 89 None Latitude, Longitude:
Administrative Information Investigator In Charge (IIC): A L CRAWFORD Adopted Date: Additional Participating Persons: WARREN V WANDEL; FORT WORTH, TX R. J HIGHTOWER; TULSA, OK DON HOLLIMAN; TX
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