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An MU3 cpr jet experiences a stick shaker after a climb and leveloff at FL390. First officer PF finally performs an altitude deviation altitude excursion during the captain's attempts to contact ATC for lower altitude.
| Attributes | |
| ACN | 418901 |
| Time | |
| Date | 199811 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : inw |
| State Reference | AZ |
| Altitude | msl bound lower : 37000 msl bound upper : 39000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zab |
| Operator | general aviation : corporate |
| Make Model Name | MU-300 Diamond 1/1A |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude cruise other other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 90 flight time total : 2300 flight time type : 350 |
| ASRS Report | 418901 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : published procedure other anomaly |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : exited adverse environment flight crew : regained aircraft control flight crew : declared emergency flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
A climb was initiated from FL370 to FL390. Upon reaching FL390, the aircraft leveled, but would not accelerate. After approximately so many seconds, the aircraft began losing airspeed. At that point, I notified center that we needed a lower altitude (I believe I was blocked on this first attempt). After the stick shaker activated, the PF initiated a descent. I then notified center a second time that we needed a lower altitude. This transmission was acknowledged. The autoplt was engaged the entire time up until the descent was initiated.
Original NASA ASRS Text
Title: AN MU3 CPR JET EXPERIENCES A STICK SHAKER AFTER A CLB AND LEVELOFF AT FL390. FO PF FINALLY PERFORMS AN ALTDEV ALT EXCURSION DURING THE CAPT'S ATTEMPTS TO CONTACT ATC FOR LOWER ALT.
Narrative: A CLB WAS INITIATED FROM FL370 TO FL390. UPON REACHING FL390, THE ACFT LEVELED, BUT WOULD NOT ACCELERATE. AFTER APPROX SO MANY SECONDS, THE ACFT BEGAN LOSING AIRSPD. AT THAT POINT, I NOTIFIED CTR THAT WE NEEDED A LOWER ALT (I BELIEVE I WAS BLOCKED ON THIS FIRST ATTEMPT). AFTER THE STICK SHAKER ACTIVATED, THE PF INITIATED A DSCNT. I THEN NOTIFIED CTR A SECOND TIME THAT WE NEEDED A LOWER ALT. THIS XMISSION WAS ACKNOWLEDGED. THE AUTOPLT WAS ENGAGED THE ENTIRE TIME UP UNTIL THE DSCNT WAS INITIATED.
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.