 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
B727 cruising FL310 got #2 engine compressor stall. Reduced thrust to idle and stall quit. Slowly advanced #2 engine and got compressor stall again. Reduced thrust to idle and elected to operate engine at idle. Declared an emergency and cleared direct msp. Landing normal. Found turbine blade missing. Company questioning not shutting engine down.
| Attributes | |
| ACN | 343632 |
| Time | |
| Date | 199608 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : msp |
| State Reference | MN |
| Altitude | msl bound lower : 31000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zmp |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 15000 flight time type : 2800 |
| ASRS Report | 343632 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 199 flight time total : 5200 flight time type : 199 |
| ASRS Report | 343490 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem flight crew : declared emergency none taken : anomaly accepted |
| Consequence | faa : investigated other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
At FL310 B727 engine #2 compressor stalled! Condition of the engine was normal, all gauges indicated normal. Engine brought back to idle and stall conditions subsided. Engine #2 was then advanced and stalled again. It was decided to operate #2 at idle as normal engine readings were observed. The landing was uneventful. We declared an emergency after first stall and descended into msp. Crash fire rescue equipment was notified for a precaution. Later found out from maintenance control that we had lost a turbine blade. Note: we are being criticized for leaving engine #2 running. I believe it is the captain's discretion and it only makes sense if you're producing any power you should leave the engine running as long as all other indications are normal. Supplemental information from acn 343490: approximately 130 NM ese of msp, ATC requested us to increase our airspeed. As the captain increased thrust the #2 engine compressor stalled.
Original NASA ASRS Text
Title: B727 CRUISING FL310 GOT #2 ENG COMPRESSOR STALL. REDUCED THRUST TO IDLE AND STALL QUIT. SLOWLY ADVANCED #2 ENG AND GOT COMPRESSOR STALL AGAIN. REDUCED THRUST TO IDLE AND ELECTED TO OPERATE ENG AT IDLE. DECLARED AN EMER AND CLRED DIRECT MSP. LNDG NORMAL. FOUND TURBINE BLADE MISSING. COMPANY QUESTIONING NOT SHUTTING ENG DOWN.
Narrative: AT FL310 B727 ENG #2 COMPRESSOR STALLED! CONDITION OF THE ENG WAS NORMAL, ALL GAUGES INDICATED NORMAL. ENG BROUGHT BACK TO IDLE AND STALL CONDITIONS SUBSIDED. ENG #2 WAS THEN ADVANCED AND STALLED AGAIN. IT WAS DECIDED TO OPERATE #2 AT IDLE AS NORMAL ENG READINGS WERE OBSERVED. THE LNDG WAS UNEVENTFUL. WE DECLARED AN EMER AFTER FIRST STALL AND DSNDED INTO MSP. CFR WAS NOTIFIED FOR A PRECAUTION. LATER FOUND OUT FROM MAINT CTL THAT WE HAD LOST A TURBINE BLADE. NOTE: WE ARE BEING CRITICIZED FOR LEAVING ENG #2 RUNNING. I BELIEVE IT IS THE CAPT'S DISCRETION AND IT ONLY MAKES SENSE IF YOU'RE PRODUCING ANY PWR YOU SHOULD LEAVE THE ENG RUNNING AS LONG AS ALL OTHER INDICATIONS ARE NORMAL. SUPPLEMENTAL INFO FROM ACN 343490: APPROX 130 NM ESE OF MSP, ATC REQUESTED US TO INCREASE OUR AIRSPD. AS THE CAPT INCREASED THRUST THE #2 ENG COMPRESSOR STALLED.
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.