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A CRJ700 developed a high engine vibe reading on climb to cruise. The vibe was worse at cruise and the engine was shut down. The flight descended to FL200 where the engine was restarted.
| Attributes | |
| ACN | 806043 |
| Time | |
| Date | 200809 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zzz.artcc |
| State Reference | US |
| Altitude | msl single value : 21000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 700 ER&LR |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 255 flight time total : 18000 flight time type : 5400 |
| ASRS Report | 806043 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | aircraft equipment other aircraft equipment : eng vib other flight crewa |
| Resolutory Action | aircraft : equipment problem dissipated flight crew : overcame equipment problem |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
Midway through climb out to ZZZ1 the #1 engine N1 vibe began increasing and entered into the yellow arc of the vibe gauge. The vibe could be felt and heard. The QRH was referenced and procedures reviewed. Thrust was adjusted to keep the vibe in the green until cruise altitude was reached. We thought that a cruise thrust setting might keep the vibe within limits; but in fact the vibe became worse. Per the QRH; a precautionary shutdown was executed. We notified ATC of our emergency; contacted dispatch and maintenance on commercial radio; and spoke to our flight attendants and passenger about our status. We began a descent with ZZZ2 as our divert field. We did not suspect engine damage (vibe only) and per the QRH an engine relight was conducted upon reaching 21000 ft. Power was brought up to cruise thrust with the vibes gone and engine indicators normal. Confident that the problem had been fixed; we canceled our emergency with ATC; notified dispatch of our status; spoke to our passenger; and continued uneventfully to ZZZ1.
Original NASA ASRS Text
Title: A CRJ700 DEVELOPED A HIGH ENG VIBE READING ON CLB TO CRUISE. THE VIBE WAS WORSE AT CRUISE AND THE ENG WAS SHUT DOWN. THE FLT DSNDED TO FL200 WHERE THE ENG WAS RESTARTED.
Narrative: MIDWAY THROUGH CLBOUT TO ZZZ1 THE #1 ENG N1 VIBE BEGAN INCREASING AND ENTERED INTO THE YELLOW ARC OF THE VIBE GAUGE. THE VIBE COULD BE FELT AND HEARD. THE QRH WAS REFED AND PROCS REVIEWED. THRUST WAS ADJUSTED TO KEEP THE VIBE IN THE GREEN UNTIL CRUISE ALT WAS REACHED. WE THOUGHT THAT A CRUISE THRUST SETTING MIGHT KEEP THE VIBE WITHIN LIMITS; BUT IN FACT THE VIBE BECAME WORSE. PER THE QRH; A PRECAUTIONARY SHUTDOWN WAS EXECUTED. WE NOTIFIED ATC OF OUR EMER; CONTACTED DISPATCH AND MAINT ON COMMERCIAL RADIO; AND SPOKE TO OUR FLT ATTENDANTS AND PAX ABOUT OUR STATUS. WE BEGAN A DSCNT WITH ZZZ2 AS OUR DIVERT FIELD. WE DID NOT SUSPECT ENG DAMAGE (VIBE ONLY) AND PER THE QRH AN ENG RELIGHT WAS CONDUCTED UPON REACHING 21000 FT. PWR WAS BROUGHT UP TO CRUISE THRUST WITH THE VIBES GONE AND ENG INDICATORS NORMAL. CONFIDENT THAT THE PROB HAD BEEN FIXED; WE CANCELED OUR EMER WITH ATC; NOTIFIED DISPATCH OF OUR STATUS; SPOKE TO OUR PAX; AND CONTINUED UNEVENTFULLY TO ZZZ1.
Data retrieved from NASA's ASRS site as of May 2009 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.