Widebody transport crew departed in icing conditions. In an attempt to make a crossing restr the cap...

Narrative:

Depart mxp runway 35L approximately 540000 pounds. Rmg 16F departure aosta 8 J transition. Moderate icing reported until 11000 ft. We performed a full power takeoff with engine anti-ice on. Iaco-a departure noise abatement departure with engine anti-ice on sometime after takeoff. We delayed flap retraction until first few crossing restrs were complied with. The captain wished to delay slat retraction until further restrs were complied with. During climb out I suggested 3 times we accelerate to slat retraction speed and retract the slats. As it was obvious if we accelerate we would not make the crossing restrs I suggested 1 turn in holding. At my second request the captain seemed to agree, commanded that we accelerate and asked for a turn in holding. Approximately 30 KTS below slat retraction speed the captain changed his mind and commanded that the nose of the aircraft be raised and canceled the holding clearance. At this point at 15000 ft I stated we needed to clean the aircraft up. The captain very forcefully stated this is how I want you to do it. (Slats extended.) as we climbed through 18000 ft milan control called us and stated we were flying into a minimum radar altitude of 19000 ft. At this time the captain requested a turn in holding. ATC authority/authorized a right turn toward the north. We executed this turn with the slats extended as this was the desire of the captain. At 20000 ft MSL the captain commanded the first officer to lower the nose to slat retraction speed. 10 KTS above slat retraction speed the slats were retracted. Immediately upon slat retraction pronounced buffet occurred and the aircraft wallowed pitched about. The slats were extended and the buffeting ceased. The slats were again retracted at a higher speed, buffeting resumed. Stall recovery procedures were successfully executed without a loss of altitude. I believe the buffet was caused by prolonged exposure to moderate icing exposure due to the high pitch attitude and slow speed.

Original NASA ASRS Text

Title: WDB CREW DEPARTED IN ICING CONDITIONS. IN AN ATTEMPT TO MAKE A XING RESTR THE CAPT DIRECTED THE FO TO PULL THE NOSE UP, AND THEN RETRACTED THE SLATS. ACFT STALL RESULTED.

Narrative: DEPART MXP RWY 35L APPROX 540000 LBS. RMG 16F DEP AOSTA 8 J TRANSITION. MODERATE ICING RPTED UNTIL 11000 FT. WE PERFORMED A FULL PWR TKOF WITH ENG ANTI-ICE ON. IACO-A DEP NOISE ABATEMENT DEP WITH ENG ANTI-ICE ON SOMETIME AFTER TKOF. WE DELAYED FLAP RETRACTION UNTIL FIRST FEW XING RESTRS WERE COMPLIED WITH. THE CAPT WISHED TO DELAY SLAT RETRACTION UNTIL FURTHER RESTRS WERE COMPLIED WITH. DURING CLBOUT I SUGGESTED 3 TIMES WE ACCELERATE TO SLAT RETRACTION SPD AND RETRACT THE SLATS. AS IT WAS OBVIOUS IF WE ACCELERATE WE WOULD NOT MAKE THE XING RESTRS I SUGGESTED 1 TURN IN HOLDING. AT MY SECOND REQUEST THE CAPT SEEMED TO AGREE, COMMANDED THAT WE ACCELERATE AND ASKED FOR A TURN IN HOLDING. APPROX 30 KTS BELOW SLAT RETRACTION SPD THE CAPT CHANGED HIS MIND AND COMMANDED THAT THE NOSE OF THE ACFT BE RAISED AND CANCELED THE HOLDING CLRNC. AT THIS POINT AT 15000 FT I STATED WE NEEDED TO CLEAN THE ACFT UP. THE CAPT VERY FORCEFULLY STATED THIS IS HOW I WANT YOU TO DO IT. (SLATS EXTENDED.) AS WE CLBED THROUGH 18000 FT MILAN CTL CALLED US AND STATED WE WERE FLYING INTO A MINIMUM RADAR ALT OF 19000 FT. AT THIS TIME THE CAPT REQUESTED A TURN IN HOLDING. ATC AUTH A R TURN TOWARD THE N. WE EXECUTED THIS TURN WITH THE SLATS EXTENDED AS THIS WAS THE DESIRE OF THE CAPT. AT 20000 FT MSL THE CAPT COMMANDED THE FO TO LOWER THE NOSE TO SLAT RETRACTION SPD. 10 KTS ABOVE SLAT RETRACTION SPD THE SLATS WERE RETRACTED. IMMEDIATELY UPON SLAT RETRACTION PRONOUNCED BUFFET OCCURRED AND THE ACFT WALLOWED PITCHED ABOUT. THE SLATS WERE EXTENDED AND THE BUFFETING CEASED. THE SLATS WERE AGAIN RETRACTED AT A HIGHER SPD, BUFFETING RESUMED. STALL RECOVERY PROCS WERE SUCCESSFULLY EXECUTED WITHOUT A LOSS OF ALT. I BELIEVE THE BUFFET WAS CAUSED BY PROLONGED EXPOSURE TO MODERATE ICING EXPOSURE DUE TO THE HIGH PITCH ATTITUDE AND SLOW SPD.

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.

Attributes
ACN	423333
Time
Date	199812
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : bla
State Reference	FO
Altitude	msl bound lower : 20000 msl bound upper : 20000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : cfi
Experience	flight time last 90 days : 250 flight time total : 12000 flight time type : 8000
ASRS Report	423333
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	altitude deviation : crossing restriction not met non adherence other other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited adverse environment other
Consequence	Other
Supplementary
Air Traffic Incident	Pilot Deviation

Widebody transport crew departed in icing conditions. In an attempt to make a crossing restr the captain directed the first officer to pull the nose up, and then retracted the slats. Aircraft stall resulted.