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CL65 flight crew requested an immediate descent to a lower altitude since aircraft performance was insufficient for maintaining cruise altitude.
| Attributes | |
| ACN | 533595 |
| Time | |
| Date | 200112 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : als.vor |
| State Reference | CO |
| Altitude | msl single value : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65, Undifferentiated or Other Model |
| 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 |
| Qualification | pilot : multi engine pilot : cfi pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 7200 flight time type : 450 |
| ASRS Report | 533595 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | other anomaly other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : stall warning other flight crewa |
| Resolutory Action | controller : issued new clearance controller : provided flight assist flight crew : regained aircraft control other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
We were cruising at FL340 when we encountered continuous light chop. We checked the FMS to see if we could climb to FL370. The FMS said we could. ZDV gave us clearance to FL370. Upon reaching FL370, we were 20 KTS above stall. Airspeed continued to decrease even in level flight (behind the power curve). We asked for lower -- FL350 or FL330. ZDV said FL350 wasn't available, he'd check FL330. We then told ZDV that we needed to descend (stall shaker) 15 KTS. The stall shaker then went off. I took over controls manually and started a descent. The first officer requested immediate descent. At FL367 ZDV told us to descend to FL330. At FL360 ZDV requested to expedite descent. We descended at 3000 FPM and ZDV thanked us for our help. Don't always believe the FMS.
Original NASA ASRS Text
Title: CL65 FLC REQUESTED AN IMMEDIATE DSCNT TO A LOWER ALT SINCE ACFT PERFORMANCE WAS INSUFFICIENT FOR MAINTAINING CRUISE ALT.
Narrative: WE WERE CRUISING AT FL340 WHEN WE ENCOUNTERED CONTINUOUS LIGHT CHOP. WE CHKED THE FMS TO SEE IF WE COULD CLB TO FL370. THE FMS SAID WE COULD. ZDV GAVE US CLRNC TO FL370. UPON REACHING FL370, WE WERE 20 KTS ABOVE STALL. AIRSPD CONTINUED TO DECREASE EVEN IN LEVEL FLT (BEHIND THE PWR CURVE). WE ASKED FOR LOWER -- FL350 OR FL330. ZDV SAID FL350 WASN'T AVAILABLE, HE'D CHK FL330. WE THEN TOLD ZDV THAT WE NEEDED TO DSND (STALL SHAKER) 15 KTS. THE STALL SHAKER THEN WENT OFF. I TOOK OVER CTLS MANUALLY AND STARTED A DSCNT. THE FO REQUESTED IMMEDIATE DSCNT. AT FL367 ZDV TOLD US TO DSND TO FL330. AT FL360 ZDV REQUESTED TO EXPEDITE DSCNT. WE DSNDED AT 3000 FPM AND ZDV THANKED US FOR OUR HELP. DON'T ALWAYS BELIEVE THE FMS.
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.