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An air carrier aircraft experienced a mountain wave climbing to FL340 causing a rate of climb increase. Another aircraft at FL350 reacted to a TCAS RA from this aircraft.
| Attributes | |
| ACN | 687856 |
| Time | |
| Date | 200602 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl bound lower : 34100 msl single value : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : commercial pilot : multi engine pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 15 flight time total : 16000 flight time type : 1500 |
| ASRS Report | 687856 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe inflight encounter other non adherence : clearance |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | flight crew : returned to assigned altitude |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Environmental Factor |
| Primary Problem | Environmental Factor |
Narrative:
Climbing out with the autoplt in indicated airspeed mode. Approaching FL330 we experienced some wave (mountain) that caused our airspeed to rise above the selected airspeed. This caused the autoplt to pitch up sharply. Our climb rate momentarily increased to +2000 FPM. Another airliner was above us level at FL350. The airliner above us got an RA and had to climb. We leveled off at FL341 and immediately returned to FL340. The first officer was the PF and didn't react to the sudden climb. I tried callouts first which wasted valuable time. I should have been more aggressive.
Original NASA ASRS Text
Title: AN ACR ACFT EXPERIENCED A MOUNTAIN WAVE CLBING TO FL340 CAUSING A RATE OF CLB INCREASE. ANOTHER ACFT AT FL350 REACTED TO A TCAS RA FROM THIS ACFT.
Narrative: CLBING OUT WITH THE AUTOPLT IN INDICATED AIRSPD MODE. APCHING FL330 WE EXPERIENCED SOME WAVE (MOUNTAIN) THAT CAUSED OUR AIRSPD TO RISE ABOVE THE SELECTED AIRSPD. THIS CAUSED THE AUTOPLT TO PITCH UP SHARPLY. OUR CLB RATE MOMENTARILY INCREASED TO +2000 FPM. ANOTHER AIRLINER WAS ABOVE US LEVEL AT FL350. THE AIRLINER ABOVE US GOT AN RA AND HAD TO CLB. WE LEVELED OFF AT FL341 AND IMMEDIATELY RETURNED TO FL340. THE FO WAS THE PF AND DIDN'T REACT TO THE SUDDEN CLB. I TRIED CALLOUTS FIRST WHICH WASTED VALUABLE TIME. I SHOULD HAVE BEEN MORE AGGRESSIVE.
Data retrieved from NASA's ASRS site as of January 2009 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.