Individually Owned: 150,657
Corporate Owned: 137,281
Tokyo-Narita Airport
Aircraft Accident/Incident Report
Nr Tokyo,Japan
Monday, May 2, 1988 18:16 BST
NTSB Narrative Summary Released at Completion of Accident
UNITED FLT 97 EXPERIENCED INDICATIONS OF UNEVEN FUEL FLOW FROM MAIN TANKS 2 AND 3 AT FL360 BEGINNING ABOUT 4- HOURS AFTER DEPARTURE ON AN 11-HOUR TRANSPACIFIC FLIGHT. THE FUEL SYSTEM HAD BEEN SET UP FOR ALL ENGINE FEED FROM THE NOS 2 AND 3 TANKS. ALTHOUGH IT WAS LATER ESTABLISHED THAT THE NUMBER 2 CROSSFEED VALVE FAILED IN THE CLOSED POSITION, THE S/O INFORMED THE CAPT THAT THE INTRANSIT LIGHT HAD ILLUMINATED WHEN THE VALVE SELECTOR WAS MOVED TO THE CLOSED POSITION - INDICATING NORMAL CROSSFEED VALVE OPERATION. FUEL SYSTEM PROBLEM WAS MISDIAGNOSED AS A PROBLEM OF FAULTY FUEL GAGE INDICATIONS. FUEL MONITORING INDICATED INSUFFICIENT FUEL FLOW FROM NO 2 TANK WHEN CROSSFEEDING. ENGS 1, 3, AND 4 FLAMED OUT WHEN FUEL WAS EXPENDED FROM ALL TANKS EXCEPT NO 2. EMERGENCY DESCENT WAS MADE TO DESTINATION TOKYO-NARITA AIRPORT. CREW REPORTED THEY USED FLAPS-20, BUT DFDR SHOWED FLAPS-1 WAS USED FOR LANDING. 3 TIRES BLEW ON LANDING. ALL 3 FLIGHTCREW QUALIFIED IN THE B-747 IN THE 13-MONTHS BEFORE THE INCIDENT.
NTSB Probable Cause Narrative
Not Yet Reported
Event Information
| Type of Event | Incident |
| Event Date | 5/2/1988 |
| Event Day of the Week | Monday |
| Time of Event | 1816 |
| Event Time Zone | Bering Standard Time |
| Event City | NR TOKYO,JAPAN |
| Event State | PACIFIC OCEAN |
| Event Country | -- |
| Zipcode of the event site | |
| Event Date Year | 1988 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | TOKYO-NARITA |
| Event Location Nearest Airport ID | NRT |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | -- |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Pilot |
| Time of the weather observation | 0 |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | |
| Elevation of weather observation facility | 0 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Unknown |
| Sky Condition for Lowest Ceiling | Unknown |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 5 |
| Air Temperature at event time (in degrees celsius) | -- |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 0 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 0 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 258 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 5114 |
| NTSB Notification Source | -- |
| NTSB Notification Date | May 2 1988 12:00AM |
| NTSB Notification Time | 0 |
| Fiche Number and/or location -used to find docket information | 40452 |
| Date of most recent change to record | Dec 13 2000 11:44AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N157UA |
| NTSB Number | DCA88IA056 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 121: Air Carrier |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | -- |
| Damage | Minor |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | BOEING |
| Aircraft Model | 747-123 |
| Aircraft Series Identifier | 747-123 |
| Aircraft Serial Number | 20106 |
| Certified Max Gross Weight | 734000 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 419 |
| Number of Engines | 4 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | -- |
| Airframe Hours | 39950 |
| ELT Installed | Unknown |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | UNITED AIRLINES |
| Aircraft Owner Street Address | SAN FRANCISCO INT'L AIRPORT |
| Aircraft Owner City | SAN FRANCISCO |
| Aircraft Owner State | CA |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 94128 |
| Operator is an individual? | -- |
| Operator Name | UNITED AIRLINES |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | |
| Operator City | |
| Operator State | |
| Operator Country | |
| Operator Zip code | |
| Operator Code | UALA |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Scheduled |
| Indicates Domestic or International Flight | International |
| Operator carrying Pax/Cargo/Mail | Passenger Only |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | LAX |
| Departure City | LOS ANGELES |
| Departure State | CA |
| Departure Country | |
| Departure Time | 1901 |
| Departure Time Zone | UTC |
| Destination Same as Local Flt | -- |
| Destination Airport Code | NRT |
| Destination City | TOKYO, JAPAN |
| Destination State | OF |
| Destination Country | |
| Specific Phase of Flight | Cruise |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Dec 20 2002 12:42PM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 34 |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |