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A B737 air carrier flight crew encountered moderate to severe turbulence during their climb above FL230. They stopped their climb and requested a lower altitude and, apparently, started an unauthorized descent before being cleared to level at FL230.
| Attributes | |
| ACN | 393350 |
| Time | |
| Date | 199802 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : vqq |
| State Reference | FL |
| Altitude | msl bound lower : 23000 msl bound upper : 23700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx tower : sfo |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 9200 flight time type : 6000 |
| ASRS Report | 393350 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : undershoot inflight encounter : weather non adherence : far non adherence : clearance |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | other |
Narrative:
Encountered moderate 'plus' turbulence on climb around FL230 to FL235. Captain advised ATC that we needed lower as soon as possible. We leveled off at FL232 as best we could in the rough air. Received clearance to FL230 where ride was smooth. Remainder of flight normal.
Original NASA ASRS Text
Title: A B737 ACR FLC ENCOUNTERED MODERATE TO SEVERE TURB DURING THEIR CLB ABOVE FL230. THEY STOPPED THEIR CLB AND REQUESTED A LOWER ALT AND, APPARENTLY, STARTED AN UNAUTH DSCNT BEFORE BEING CLRED TO LEVEL AT FL230.
Narrative: ENCOUNTERED MODERATE 'PLUS' TURB ON CLB AROUND FL230 TO FL235. CAPT ADVISED ATC THAT WE NEEDED LOWER ASAP. WE LEVELED OFF AT FL232 AS BEST WE COULD IN THE ROUGH AIR. RECEIVED CLRNC TO FL230 WHERE RIDE WAS SMOOTH. REMAINDER OF FLT NORMAL.
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.