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S80 flight crew has an encounter with clear air turbulence at FL330. They request an altitude change to FL290. PIC declares an emergency after they leave FL330 for FL290 prior to receiving a response from ZOA.
| Attributes | |
| ACN | 353162 |
| Time | |
| Date | 199611 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : czq |
| State Reference | CA |
| Altitude | msl bound lower : 29000 msl bound upper : 33000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other descent other other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| ASRS Report | 353162 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter other non adherence : far non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : exited adverse environment other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
ATC facility: ZOA. Location: czq -- 270 -- 90. Flying at FL330 we entered an area of moderate to severe turbulence. We requested a descent to FL290. The captain initiated a descent to FL290 while we were waiting for a response from ZOA. We then declared an emergency to get the lower altitude.
Original NASA ASRS Text
Title: S80 FLC HAS AN ENCOUNTER WITH CLR AIR TURB AT FL330. THEY REQUEST AN ALT CHANGE TO FL290. PIC DECLARES AN EMER AFTER THEY LEAVE FL330 FOR FL290 PRIOR TO RECEIVING A RESPONSE FROM ZOA.
Narrative: ATC FACILITY: ZOA. LOCATION: CZQ -- 270 -- 90. FLYING AT FL330 WE ENTERED AN AREA OF MODERATE TO SEVERE TURB. WE REQUESTED A DSCNT TO FL290. THE CAPT INITIATED A DSCNT TO FL290 WHILE WE WERE WAITING FOR A RESPONSE FROM ZOA. WE THEN DECLARED AN EMER TO GET THE LOWER ALT.
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.