|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||airport : dfw|
|Altitude||agl bound lower : 0|
agl bound upper : 0
|Operator||common carrier : air carrier|
|Make Model Name||Medium Large Transport, Low Wing, 2 Turbojet Eng|
|Flight Phase||ground : preflight|
ground other : taxi
|Affiliation||company : air carrier|
|Function||flight crew : first officer|
|Qualification||pilot : cfi|
pilot : atp
|Experience||flight time last 90 days : 200|
flight time total : 8000
flight time type : 1300
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : atp|
|Anomaly||aircraft equipment problem : less severe|
non adherence : published procedure
non adherence : far
other anomaly other
|Independent Detector||other flight crewa|
|Resolutory Action||none taken : anomaly accepted|
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
During pwrback from the gate at dfw, possible engine damage occurred due to ice and snow ingestion by the engine. Dallas had experienced ice pellets, freezing rain and snow the night before, and runways and ramps were snow and ice packed. During pwrback 2 compressor stalls were heard, but the engines appeared normal on taxi out. The aircraft was then deiced at the deicing bay. Both engines started and a normal takeoff made for chi, il. During climb through 30000', 3 compressor stalls were heard and the right engine throttled back. At reduced power the engine operated normally, but if climb power was applied, it would again compressor stall. A discussion took place in regards to landing at the nearest suitable airport, but the captain decided since the engine was operating ok at reduced power. We would continue on to our destination. Upon arrival in chi, turbine blade damage was noticed during the post-flight walk around. In my opinion a number of bad judgements were made on this flight. Pwrback from the gate is not authority/authorized by our operations specifications, and yet we did so, even with ice and snow contaminating the ramp. Although I expressed concern of not being able to pwrback due to ice and snow build up, I was not forceful enough to change the captain's decision. At altitude I again suggested that we deviation to the nearest airport, but was not forceful enough to influence the captain's decision to continue to chi.
Original NASA ASRS Text
Title: ACR MLG POWERED BACK WITH ICE AND SNOW ON RAMP CAUSING COMPRESSOR STALLS, THEN CONTINUED FLT WITHOUT DAMAGE CHECK.
Narrative: DURING PWRBACK FROM THE GATE AT DFW, POSSIBLE ENG DAMAGE OCCURRED DUE TO ICE AND SNOW INGESTION BY THE ENG. DALLAS HAD EXPERIENCED ICE PELLETS, FREEZING RAIN AND SNOW THE NIGHT BEFORE, AND RWYS AND RAMPS WERE SNOW AND ICE PACKED. DURING PWRBACK 2 COMPRESSOR STALLS WERE HEARD, BUT THE ENGS APPEARED NORMAL ON TAXI OUT. THE ACFT WAS THEN DEICED AT THE DEICING BAY. BOTH ENGS STARTED AND A NORMAL TKOF MADE FOR CHI, IL. DURING CLB THROUGH 30000', 3 COMPRESSOR STALLS WERE HEARD AND THE RIGHT ENG THROTTLED BACK. AT REDUCED PWR THE ENG OPERATED NORMALLY, BUT IF CLB PWR WAS APPLIED, IT WOULD AGAIN COMPRESSOR STALL. A DISCUSSION TOOK PLACE IN REGARDS TO LNDG AT THE NEAREST SUITABLE ARPT, BUT THE CAPT DECIDED SINCE THE ENG WAS OPERATING OK AT REDUCED PWR. WE WOULD CONTINUE ON TO OUR DEST. UPON ARR IN CHI, TURBINE BLADE DAMAGE WAS NOTICED DURING THE POST-FLT WALK AROUND. IN MY OPINION A NUMBER OF BAD JUDGEMENTS WERE MADE ON THIS FLT. PWRBACK FROM THE GATE IS NOT AUTH BY OUR OPERATIONS SPECS, AND YET WE DID SO, EVEN WITH ICE AND SNOW CONTAMINATING THE RAMP. ALTHOUGH I EXPRESSED CONCERN OF NOT BEING ABLE TO PWRBACK DUE TO ICE AND SNOW BUILD UP, I WAS NOT FORCEFUL ENOUGH TO CHANGE THE CAPT'S DECISION. AT ALT I AGAIN SUGGESTED THAT WE DEV TO THE NEAREST ARPT, BUT WAS NOT FORCEFUL ENOUGH TO INFLUENCE THE CAPT'S DECISION TO CONTINUE TO CHI.
Data retrieved from NASA's ASRS site as of August 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.