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An air carrier medium large transport tried to climb too high for it's weight with a load of ice and was unable to maintain altitude.
| Attributes | |
| ACN | 211430 |
| Time | |
| Date | 199205 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : shv |
| State Reference | LA |
| Altitude | msl bound lower : 32200 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 184 flight time total : 5960 flight time type : 1440 |
| ASRS Report | 211430 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 7500 flight time type : 4000 |
| ASRS Report | 211731 |
| Events | |
| Anomaly | altitude deviation : undershoot inflight encounter : weather non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : declared emergency |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While departing houston passing FL260, ZHU cleared us to cross FL330 by 35 DME south of shv. About this time we were experiencing very light, occasional rime ice. Anti-ice was turned on slightly reducing thrust available. Leveling at FL330 at 35 DME we encountered mild stall buffet and had to descend to FL322 to increase airspeed and and stabilize the aircraft. We informed center of these actions and were able to avoid any serious conflict. We were later cleared to FL310 until out of the WX and later back to FL350. Most likely a vector would have been our better choice since the aircraft was originally too heavy to meet climb and level off conditions.
Original NASA ASRS Text
Title: AN ACR MLG TRIED TO CLB TOO HIGH FOR IT'S WT WITH A LOAD OF ICE AND WAS UNABLE TO MAINTAIN ALT.
Narrative: WHILE DEPARTING HOUSTON PASSING FL260, ZHU CLRED US TO CROSS FL330 BY 35 DME S OF SHV. ABOUT THIS TIME WE WERE EXPERIENCING VERY LIGHT, OCCASIONAL RIME ICE. ANTI-ICE WAS TURNED ON SLIGHTLY REDUCING THRUST AVAILABLE. LEVELING AT FL330 AT 35 DME WE ENCOUNTERED MILD STALL BUFFET AND HAD TO DSND TO FL322 TO INCREASE AIRSPD AND AND STABILIZE THE ACFT. WE INFORMED CTR OF THESE ACTIONS AND WERE ABLE TO AVOID ANY SERIOUS CONFLICT. WE WERE LATER CLRED TO FL310 UNTIL OUT OF THE WX AND LATER BACK TO FL350. MOST LIKELY A VECTOR WOULD HAVE BEEN OUR BETTER CHOICE SINCE THE ACFT WAS ORIGINALLY TOO HVY TO MEET CLB AND LEVEL OFF CONDITIONS.
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.