Small transport corp aircraft has captain's front outer pane break at FL250.

Attributes
ACN	265143
Time
Date	199403
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : tul
State Reference	OK
Altitude	msl bound lower : 25000 msl bound upper : 25000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc
Operator	general aviation : corporate
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 91
Flight Phase	cruise other descent other other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 6600 flight time type : 4000
ASRS Report	265143
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical altitude deviation : overshoot non adherence : published procedure non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance flight crew : exited adverse environment flight crew : declared emergency
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Cruise FL250. Left windshield outer pane broke. Asked center for lower, got FL240. Told center need to get down lower, then got FL160, but by that time was out of FL240 -- more like FL235 -- when I got the 16000 ft ATC was great and very fast to get me down below 18000 ft. Leveled off at 10000 ft. Cabin differential was at .5 IAS, was 140 KTS. Went home at that altitude. Copilot flew ILS to rog without incident.

Original NASA ASRS Text

Title: SMT CORP ACFT HAS CAPT'S FRONT OUTER PANE BREAK AT FL250.

Narrative: CRUISE FL250. L WINDSHIELD OUTER PANE BROKE. ASKED CTR FOR LOWER, GOT FL240. TOLD CTR NEED TO GET DOWN LOWER, THEN GOT FL160, BUT BY THAT TIME WAS OUT OF FL240 -- MORE LIKE FL235 -- WHEN I GOT THE 16000 FT ATC WAS GREAT AND VERY FAST TO GET ME DOWN BELOW 18000 FT. LEVELED OFF AT 10000 FT. CABIN DIFFERENTIAL WAS AT .5 IAS, WAS 140 KTS. WENT HOME AT THAT ALT. COPLT FLEW ILS TO ROG WITHOUT INCIDENT.

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.