An air carrier MD80 flight crew climbs to optimum altitude then finds that the aircraft performance is insufficient to hold that altitude when they put the anti-ice on. The flight crew started down before they requested a descent due to both performance and engine compressor stall problems.

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Attributes
ACN	344190
Time
Date	199608
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : swl
State Reference	MD
Altitude	msl bound lower : 35000 msl bound upper : 35000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc tracon : den
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 8000
ASRS Report	344190
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : issued new clearance other other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Climbed to FL350 at maximum weight for altitude. After level off required engine anti-ice. Could not hold speed and then had a compressor stall on the right engine, requested a lower altitude as descent was started. Should have requested a lower altitude as soon as airspeed started to decay.

Original NASA ASRS Text

Title: AN ACR MD80 FLC CLBS TO OPTIMUM ALT THEN FINDS THAT THE ACFT PERFORMANCE IS INSUFFICIENT TO HOLD THAT ALT WHEN THEY PUT THE ANTI-ICE ON. THE FLC STARTED DOWN BEFORE THEY REQUESTED A DSCNT DUE TO BOTH PERFORMANCE AND ENG COMPRESSOR STALL PROBS.

Narrative: CLBED TO FL350 AT MAX WT FOR ALT. AFTER LEVEL OFF REQUIRED ENG ANTI-ICE. COULD NOT HOLD SPD AND THEN HAD A COMPRESSOR STALL ON THE R ENG, REQUESTED A LOWER ALT AS DSCNT WAS STARTED. SHOULD HAVE REQUESTED A LOWER ALT AS SOON AS AIRSPD STARTED TO DECAY.

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.