B727 crew departed bzn without contacting the tower.

Attributes
ACN	425577
Time
Date	199901
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bzn
State Reference	MT
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727-200
Flight Phase	climbout : initial climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 200 flight time total : 7000 flight time type : 3000
ASRS Report	425577
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	other anomaly other
Supplementary
Air Traffic Incident	other

Narrative:

Made a normal takeoff out of bzn after receiving IFR clearance from ZLC on 132.40. Made advisories on unicom. Later on climb out we heard ZLC hand an airplane over to bzn tower. We were unaware that a tower was in operation at bzn. No NOTAMS or advisories were published stating that the bzn tower was now operational. We knew they were planning to open the tower soon but had heard the operational date would be sometime in march 1999. To make long story short, we took off out of bzn without contacting the tower which apparently is now in service.

Original NASA ASRS Text

Title: B727 CREW DEPARTED BZN WITHOUT CONTACTING THE TWR.

Narrative: MADE A NORMAL TKOF OUT OF BZN AFTER RECEIVING IFR CLRNC FROM ZLC ON 132.40. MADE ADVISORIES ON UNICOM. LATER ON CLBOUT WE HEARD ZLC HAND AN AIRPLANE OVER TO BZN TWR. WE WERE UNAWARE THAT A TWR WAS IN OP AT BZN. NO NOTAMS OR ADVISORIES WERE PUBLISHED STATING THAT THE BZN TWR WAS NOW OPERATIONAL. WE KNEW THEY WERE PLANNING TO OPEN THE TWR SOON BUT HAD HEARD THE OPERATIONAL DATE WOULD BE SOMETIME IN MARCH 1999. TO MAKE LONG STORY SHORT, WE TOOK OFF OUT OF BZN WITHOUT CONTACTING THE TWR WHICH APPARENTLY IS NOW IN SVC.

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.