Narrative:

The left side pilot window blew out at cruise flight, 3500 ft. There was a crack in the plastic window about 6 inches long from the lower edge of the window up to the air vent door. On the ground the crack was flush and virtually unnoticeable. Once we were airborne, the pressure differential between the inside and outside of the airplane caused the window to bow outward about 1/4-1/2 inch. The crack in the window was causing a lot of static on the microphone headsets and I was adjusting the squelch when the window popped out. Our initial reaction was that of being somewhat startled at first, but immediately thereafter myself and the other pilot began to laugh for about 10 mins. Approximately 1 min after the window blew out we informed bay approach of our situation. They proceeded to ask us a series of questions and asked if we needed assistance. The flight was continued to bracket field in los angeles because due to a little extra noise and an inspection of the tail section which indicated no damage, the flight characteristics of the aircraft were the same, although we did have to turn on the alternate air to get our pitot static instruments to read accurately. The rest of the flight was uneventful and ran smoothly. We landed at bracket field and notified our employer.

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Original NASA ASRS Text

Title: A MULTI-ENGED CPR ACFT BEING USED FOR FLT TRAINING DURING A REPOSITIONING FLT HAS THE L SIDE PLT'S WINDOW BREAK AND DEPART THE ACFT WHILE OVER THE SFO BAY. THE FLC CONTINUE THE FLT FROM CCR TO POC AFTER CHKING THE ACFT FOR SECONDARY DAMAGE AND FOR HANDLING CHARACTERISTICS. EMER, APPARENTLY, NOT DECLARED.

Narrative: THE L SIDE PLT WINDOW BLEW OUT AT CRUISE FLT, 3500 FT. THERE WAS A CRACK IN THE PLASTIC WINDOW ABOUT 6 INCHES LONG FROM THE LOWER EDGE OF THE WINDOW UP TO THE AIR VENT DOOR. ON THE GND THE CRACK WAS FLUSH AND VIRTUALLY UNNOTICEABLE. ONCE WE WERE AIRBORNE, THE PRESSURE DIFFERENTIAL BTWN THE INSIDE AND OUTSIDE OF THE AIRPLANE CAUSED THE WINDOW TO BOW OUTWARD ABOUT 1/4-1/2 INCH. THE CRACK IN THE WINDOW WAS CAUSING A LOT OF STATIC ON THE MICROPHONE HEADSETS AND I WAS ADJUSTING THE SQUELCH WHEN THE WINDOW POPPED OUT. OUR INITIAL REACTION WAS THAT OF BEING SOMEWHAT STARTLED AT FIRST, BUT IMMEDIATELY THEREAFTER MYSELF AND THE OTHER PLT BEGAN TO LAUGH FOR ABOUT 10 MINS. APPROX 1 MIN AFTER THE WINDOW BLEW OUT WE INFORMED BAY APCH OF OUR SIT. THEY PROCEEDED TO ASK US A SERIES OF QUESTIONS AND ASKED IF WE NEEDED ASSISTANCE. THE FLT WAS CONTINUED TO BRACKET FIELD IN LOS ANGELES BECAUSE DUE TO A LITTLE EXTRA NOISE AND AN INSPECTION OF THE TAIL SECTION WHICH INDICATED NO DAMAGE, THE FLT CHARACTERISTICS OF THE ACFT WERE THE SAME, ALTHOUGH WE DID HAVE TO TURN ON THE ALTERNATE AIR TO GET OUR PITOT STATIC INSTS TO READ ACCURATELY. THE REST OF THE FLT WAS UNEVENTFUL AND RAN SMOOTHLY. WE LANDED AT BRACKET FIELD AND NOTIFIED OUR EMPLOYER.

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.