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Fuel dumped and diversion to another airport after a B747-100 cargo flight loses its #1 pack at FL330 on frequency with rjtg.
| Attributes | |
| ACN | 634987 |
| Time | |
| Date | 200410 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : goc.vor |
| State Reference | FO |
| Altitude | msl single value : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : rjtg.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B747-100 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | enroute : pacific |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | controller military : 20 controller non radar : 31 controller radar : 31 flight time last 90 days : 135 flight time total : 12000 flight time type : 2000 |
| ASRS Report | 634987 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : diverted to another airport other |
| Consequence | other other |
| Factors | |
| Maintenance | performance deficiency : inspection performance deficiency : testing |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
While at cruise altitude of 33000 ft, flight crew experienced a #1 pack trip (on a 2-PACK aircraft). Crew elected to descend to 21000 ft, jettison approximately 62000 pounds of fuel, all with ATC approval and divert to nearby tokyo's narita airport. This aircraft had recently undergone numerous maintenance performed on pressurization and air conditioning system. Recommend special maintenance on this aircraft's pack system, with follow up checks.
Original NASA ASRS Text
Title: FUEL DUMPED AND DIVERSION TO ANOTHER ARPT AFTER A B747-100 CARGO FLT LOSES ITS #1 PACK AT FL330 ON FREQ WITH RJTG.
Narrative: WHILE AT CRUISE ALT OF 33000 FT, FLT CREW EXPERIENCED A #1 PACK TRIP (ON A 2-PACK ACFT). CREW ELECTED TO DSND TO 21000 FT, JETTISON APPROX 62000 LBS OF FUEL, ALL WITH ATC APPROVAL AND DIVERT TO NEARBY TOKYO'S NARITA ARPT. THIS ACFT HAD RECENTLY UNDERGONE NUMEROUS MAINT PERFORMED ON PRESSURIZATION AND AIR CONDITIONING SYS. RECOMMEND SPECIAL MAINT ON THIS ACFT'S PACK SYS, WITH FOLLOW UP CHKS.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.