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A DC9-30 in cruise at FL310 declared an emergency and diverted due to right engine compressor stalls. Engine operated at 70% power. Cause unknown.
| Attributes | |
| ACN | 592400 |
| Time | |
| Date | 200309 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc tower : las.tower |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 11500 flight time type : 2500 |
| ASRS Report | 592400 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : right engine indicators other flight crewa other flight crewb |
| Resolutory Action | flight crew : declared emergency flight crew : diverted to another airport |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
During cruise at FL310, the #2 engine made 2 very loud compressor stalls. Power was immediately brought back to 70% and the stalls stopped. Over ZZZ VOR, we then diverted to ZZZ1. The engine continued to run at a reduced power setting the entire flight. An emergency was declared. A normal landing, rollout and taxi to ZZZ1 gate was also made.
Original NASA ASRS Text
Title: A DC9-30 IN CRUISE AT FL310 DECLARED AN EMER AND DIVERTED DUE TO R ENG COMPRESSOR STALLS. ENG OPERATED AT 70% PWR. CAUSE UNKNOWN.
Narrative: DURING CRUISE AT FL310, THE #2 ENG MADE 2 VERY LOUD COMPRESSOR STALLS. PWR WAS IMMEDIATELY BROUGHT BACK TO 70% AND THE STALLS STOPPED. OVER ZZZ VOR, WE THEN DIVERTED TO ZZZ1. THE ENG CONTINUED TO RUN AT A REDUCED PWR SETTING THE ENTIRE FLT. AN EMER WAS DECLARED. A NORMAL LNDG, ROLLOUT AND TAXI TO ZZZ1 GATE WAS ALSO MADE.
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.