WX factors affected an air carrier flight crew's non-compliance with a crossing restr.

Attributes
ACN	303200
Time
Date	199505
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ott
State Reference	MD
Altitude	msl bound lower : 24000 msl bound upper : 25000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	enroute airway : zdc
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer pilot : cfi
Experience	flight time last 90 days : 240 flight time total : 20000 flight time type : 2500
ASRS Report	303200
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 270 flight time total : 18000 flight time type : 10000
ASRS Report	303530
Events
Anomaly	altitude deviation : crossing restriction not met inflight encounter : weather non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ATC issued to cross ott at FL240. Descent delayed because of icing and turbulence in clouds. Descent established to FL240 and slight course deviation due to cloud build-up. Did not advise ATC of deviation because we thought we could make restr but icing more prevalent than thought. Turbulence continued down to FL180. Restr complied with immediately after deviation. Supplemental information from acn 303530: and on course by 10 mi east. Didn't think this build up was a factor until close proximity and too late to advise ATC.

Original NASA ASRS Text

Title: WX FACTORS AFFECTED AN ACR FLC'S NON-COMPLIANCE WITH A XING RESTR.

Narrative: ATC ISSUED TO CROSS OTT AT FL240. DSCNT DELAYED BECAUSE OF ICING AND TURB IN CLOUDS. DSCNT ESTABLISHED TO FL240 AND SLIGHT COURSE DEV DUE TO CLOUD BUILD-UP. DID NOT ADVISE ATC OF DEV BECAUSE WE THOUGHT WE COULD MAKE RESTR BUT ICING MORE PREVALENT THAN THOUGHT. TURB CONTINUED DOWN TO FL180. RESTR COMPLIED WITH IMMEDIATELY AFTER DEV. SUPPLEMENTAL INFO FROM ACN 303530: AND ON COURSE BY 10 MI E. DIDN'T THINK THIS BUILD UP WAS A FACTOR UNTIL CLOSE PROX AND TOO LATE TO ADVISE ATC.

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.