A B757-200 flight crew fails to make an altitude crossing restr during their troubleshooting of a malfunctioning window heat system while at FL330 near lewey intersection, ZKC, mo.

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Attributes
ACN	476521
Time
Date	200006
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : cap.vortac
State Reference	IL
Altitude	msl bound lower : 24000 msl bound upper : 33000
Environment
Flight Conditions	IMC
Weather Elements	Thunderstorm
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	other other vortac
Flight Phase	cruise : level cruise : enroute altitude change
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 3000 flight time type : 250
ASRS Report	476521
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : crossing restriction not met altitude deviation : undershoot inflight encounter : weather non adherence : clearance other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	other
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Aircraft Environmental Factor
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While diverting around thunderstorms in IFR conditions, we were given a clearance to cross lewey intersection at FL240. We were not presently on a route, we were giving ourselves headings around the WX after being cleared for the deviation. Immediately after getting clearance to cross lewey at FL240 we had a malfunction with the window heat system and, while working to resolve that, we maintained our current altitude of FL330 and missed the lewey restr. We asked center if they still wanted us to descend and he said no, descend to FL290. I am not aware of any conflicts caused by our inattn and center didn't mention any. We should not have accepted a clearance to cross a fix without first being cleared on a route, direct, etc.

Original NASA ASRS Text

Title: A B757-200 FLC FAILS TO MAKE AN ALT XING RESTR DURING THEIR TROUBLESHOOTING OF A MALFUNCTIONING WINDOW HEAT SYS WHILE AT FL330 NEAR LEWEY INTXN, ZKC, MO.

Narrative: WHILE DIVERTING AROUND TSTMS IN IFR CONDITIONS, WE WERE GIVEN A CLRNC TO CROSS LEWEY INTXN AT FL240. WE WERE NOT PRESENTLY ON A RTE, WE WERE GIVING OURSELVES HDGS AROUND THE WX AFTER BEING CLRED FOR THE DEV. IMMEDIATELY AFTER GETTING CLRNC TO CROSS LEWEY AT FL240 WE HAD A MALFUNCTION WITH THE WINDOW HEAT SYS AND, WHILE WORKING TO RESOLVE THAT, WE MAINTAINED OUR CURRENT ALT OF FL330 AND MISSED THE LEWEY RESTR. WE ASKED CTR IF THEY STILL WANTED US TO DSND AND HE SAID NO, DSND TO FL290. I AM NOT AWARE OF ANY CONFLICTS CAUSED BY OUR INATTN AND CTR DIDN'T MENTION ANY. WE SHOULD NOT HAVE ACCEPTED A CLRNC TO CROSS A FIX WITHOUT FIRST BEING CLRED ON A RTE, DIRECT, ETC.

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.