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After requesting a climb to FL410 for smoother air, a B737 crew was unable to reach the altitude in the required 5 mins.
| Attributes | |
| ACN | 572972 |
| Time | |
| Date | 200301 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zab.artcc |
| State Reference | NM |
| Altitude | msl bound lower : 37000 msl bound upper : 41000 |
| Environment | |
| Weather Elements | Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zab.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : vacating altitude cruise : enroute altitude change |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zab.artcc |
| Make Model Name | Commercial Fixed Wing |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 572972 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | non adherence : clearance |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance controller : separated traffic |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance |
| Primary Problem | Aircraft |
Narrative:
We were level at FL370 with ZAB. The ride was terrible. FL410 was reported smooth. We were filed for and capable of FL410, so we requested a climb. Initial climb rate in VNAV was 1000 FPM. Soon after beginning climb, ATC asked if we could be level at FL410 in 5 mins. I replied affirmative. Passing FL390, however, the ride and subsequently our climb rate deteriorated. Still, I thought we would make our 5 min restr. However, such was not going to be the case and I advised center around FL400 that we would not be able to reach FL410 in allotted time. He then cleared conflicting opposite direction traffic to descend to FL390. We had the traffic in sight and there appeared to be no loss of separation.
Original NASA ASRS Text
Title: AFTER REQUESTING A CLB TO FL410 FOR SMOOTHER AIR, A B737 CREW WAS UNABLE TO REACH THE ALT IN THE REQUIRED 5 MINS.
Narrative: WE WERE LEVEL AT FL370 WITH ZAB. THE RIDE WAS TERRIBLE. FL410 WAS RPTED SMOOTH. WE WERE FILED FOR AND CAPABLE OF FL410, SO WE REQUESTED A CLB. INITIAL CLB RATE IN VNAV WAS 1000 FPM. SOON AFTER BEGINNING CLB, ATC ASKED IF WE COULD BE LEVEL AT FL410 IN 5 MINS. I REPLIED AFFIRMATIVE. PASSING FL390, HOWEVER, THE RIDE AND SUBSEQUENTLY OUR CLB RATE DETERIORATED. STILL, I THOUGHT WE WOULD MAKE OUR 5 MIN RESTR. HOWEVER, SUCH WAS NOT GOING TO BE THE CASE AND I ADVISED CTR AROUND FL400 THAT WE WOULD NOT BE ABLE TO REACH FL410 IN ALLOTTED TIME. HE THEN CLRED CONFLICTING OPPOSITE DIRECTION TFC TO DSND TO FL390. WE HAD THE TFC IN SIGHT AND THERE APPEARED TO BE NO LOSS OF SEPARATION.
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.