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A B747-200 dumps fuel and returns to msp after having received ongoing indications of low EPR, high egt and nacelle temperatures with high stage open light on, near onl, northeast.
| Attributes | |
| ACN | 466058 |
| Time | |
| Date | 200003 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| State Reference | NE |
| Altitude | msl single value : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zmp.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B747-100 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Route In Use | enroute airway : ns.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine pilot : instrument pilot : flight engineer pilot : commercial |
| Experience | flight time last 90 days : 140 flight time total : 18000 flight time type : 2000 |
| ASRS Report | 466058 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 120 flight time total : 10000 flight time type : 1500 |
| ASRS Report | 466068 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : oil guage other flight crewa |
| Resolutory Action | flight crew : landed as precaution flight crew : diverted to another airport |
| Consequence | other other other |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
On takeoff out of msp, #2 engine slow to accelerate. Reached normal takeoff EPR prior to V1, but egt higher than normal in yellow caution area. On climb out, reduced thrust on #2 engine to out of caution range. While climbing, #2 engine high stage light came on and #2 engine nacelle temperature increased a lot with constant speed drive temperature rise. We closed respective #2 bleed valve and engine nacelle temperature began to decrease back to normal temperature range. We performed company related emergency procedures in company operations manual. We then advised company on both ACARS and radio (maintenance and dispatch) of problem. Decided to return to msp/st paul international. We requested to dump fuel with msp ATC and declared emergency to dump fuel, approved by ATC. Dumped 70000 pounds. We returned msp after dumping. Engine #2 separating normal, did not secure. Had emergency equipment standing by. Landed with all engines operating. Taxied clear of runway and to gate. Landed normal and situation normal after landing. Supplemental information from acn 466068: informed dispatch and maintenance control. After some time, maintenance control advised us to return to airport because of suspected blown duct and its unpredictability (possible fire warning). Dumped fuel at cruise altitude (FL350 and FL330) after declaring emergency.
Original NASA ASRS Text
Title: A B747-200 DUMPS FUEL AND RETURNS TO MSP AFTER HAVING RECEIVED ONGOING INDICATIONS OF LOW EPR, HIGH EGT AND NACELLE TEMPS WITH HIGH STAGE OPEN LIGHT ON, NEAR ONL, NE.
Narrative: ON TKOF OUT OF MSP, #2 ENG SLOW TO ACCELERATE. REACHED NORMAL TKOF EPR PRIOR TO V1, BUT EGT HIGHER THAN NORMAL IN YELLOW CAUTION AREA. ON CLBOUT, REDUCED THRUST ON #2 ENG TO OUT OF CAUTION RANGE. WHILE CLBING, #2 ENG HIGH STAGE LIGHT CAME ON AND #2 ENG NACELLE TEMP INCREASED A LOT WITH CONSTANT SPD DRIVE TEMP RISE. WE CLOSED RESPECTIVE #2 BLEED VALVE AND ENG NACELLE TEMP BEGAN TO DECREASE BACK TO NORMAL TEMP RANGE. WE PERFORMED COMPANY RELATED EMER PROCS IN COMPANY OPS MANUAL. WE THEN ADVISED COMPANY ON BOTH ACARS AND RADIO (MAINT AND DISPATCH) OF PROB. DECIDED TO RETURN TO MSP/ST PAUL INTL. WE REQUESTED TO DUMP FUEL WITH MSP ATC AND DECLARED EMER TO DUMP FUEL, APPROVED BY ATC. DUMPED 70000 LBS. WE RETURNED MSP AFTER DUMPING. ENG #2 SEPARATING NORMAL, DID NOT SECURE. HAD EMER EQUIP STANDING BY. LANDED WITH ALL ENGS OPERATING. TAXIED CLR OF RWY AND TO GATE. LANDED NORMAL AND SIT NORMAL AFTER LNDG. SUPPLEMENTAL INFO FROM ACN 466068: INFORMED DISPATCH AND MAINT CTL. AFTER SOME TIME, MAINT CTL ADVISED US TO RETURN TO ARPT BECAUSE OF SUSPECTED BLOWN DUCT AND ITS UNPREDICTABILITY (POSSIBLE FIRE WARNING). DUMPED FUEL AT CRUISE ALT (FL350 AND FL330) AFTER DECLARING EMER.
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.