Narrative:

[We] were scheduled to do a round trip to bzn. We started the day with no issues. The first turn was in the middle of our day and the flight out to bzn we were delayed about 30 minutes because of weather at the time of our departure. We had to deice and it put us arriving into bzn about 30 minutes late. The flight was normal except for the fact it was my first time flying into bzn. The first officer had been to bzn once before however it was a VFR clear day for him. I felt comfortable flying into the airport because I have spent time in montana and was familiar with the terrain. The issue we had was on departure we received our clearance; as filed direct bzn; V86... Cleared to FL370. I was rushing things to try and make up time because of our late arrival and never heard the first officer get the clearance from ATC because I was on the phone talking to my wife. Our set up had been completed and the only thing remained was departure brief and before start checklist. We discussed the clearance and continued with the departure brief the first officer was the pilot flying. I believe he briefed runway heading; FL370 and then with the return plan to bzn in the event of an engine failure; it was a special procedure. During the brief and clearance ATC did not assign a departure procedure; so a departure procedure was not part of our takeoff briefing. It also was not part of our filed flight plan. We were cleared for takeoff and no heading instruction was issued from tower. We departed runway 12 on the runway heading and contacted salt lake center. I checked on the frequency and advised him we are off bzn; runway heading; climbing I believe it was around 8;500 ft MSL. The clouds in our area were around 9;500. ATC asked if we were assigned runway heading. I read back that I believed we were. He ask us to standby. He also indicated that the minimum IFR altitude is 11;500 and we were about to enter the clouds at 9;500. I did not have adequate terrain visibility; however we were able to climb and maintain 15;000 and turned on course to V86. I was informed that we were not assigned runway heading and that we were supposed to be on the BZN3 departure. I told him we were never assigned a departure at all. To which he said that it's expected that we fly a departure procedure out of bzn. We discussed this further and he told me one of our aircraft did the same thing a week ago. He then handed me off to the next controller once we were on course. The suggestions I have for avoiding this in the future are as follows: 1. Provide the pilots with specific mountain flying training; not just a memo.2. We currently do not have the color photos of the airport in bzn; I'm sure bzn is also a special airport qualification because of the terrain.3. Have the departure procedure be a part of the filed flight plan.4. Issue a guide for all special airports that we currently fly to in mountainous terrain.

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Original NASA ASRS Text

Title: An air carrier departed BZN on the runway heading when they were supposed to fly the BZN3 SID even though it was not read back as part of the clearance.

Narrative: [We] were scheduled to do a round trip to BZN. We started the day with no issues. The first turn was in the middle of our day and the flight out to BZN we were delayed about 30 minutes because of weather at the time of our departure. We had to deice and it put us arriving into BZN about 30 minutes late. The flight was normal except for the fact it was my first time flying into BZN. The First Officer had been to BZN once before however it was a VFR clear day for him. I felt comfortable flying into the airport because I have spent time in Montana and was familiar with the terrain. The issue we had was on departure we received our clearance; as filed direct BZN; V86... cleared to FL370. I was rushing things to try and make up time because of our late arrival and never heard the First Officer get the clearance from ATC because I was on the phone talking to my wife. Our set up had been completed and the only thing remained was departure brief and before start checklist. We discussed the clearance and continued with the departure brief the First Officer was the pilot flying. I believe he briefed runway heading; FL370 and then with the return plan to BZN in the event of an engine failure; it was a special procedure. During the brief and clearance ATC did not assign a departure procedure; so a departure procedure was not part of our takeoff briefing. it also was not part of our filed flight plan. We were cleared for takeoff and no heading instruction was issued from Tower. We departed Runway 12 on the runway heading and contacted Salt Lake Center. I checked on the frequency and advised him we are off BZN; runway heading; climbing I believe it was around 8;500 FT MSL. The clouds in our area were around 9;500. ATC asked if we were assigned runway heading. I read back that I believed we were. He ask us to standby. He also indicated that the minimum IFR altitude is 11;500 and we were about to enter the clouds at 9;500. I did not have adequate terrain visibility; however we were able to climb and maintain 15;000 and turned on course to V86. I was informed that we were not assigned runway heading and that we were supposed to be on the BZN3 departure. I told him we were never assigned a departure at all. To which he said that it's expected that we fly a departure procedure out of BZN. We discussed this further and he told me one of our aircraft did the same thing a week ago. He then handed me off to the next controller once we were on course. The suggestions I have for avoiding this in the future are as follows: 1. Provide the pilots with specific mountain flying training; not just a memo.2. We currently do not have the color photos of the airport in BZN; I'm sure BZN is also a special airport qualification because of the terrain.3. have the departure procedure be a part of the filed flight plan.4. issue a guide for all special airports that we currently fly to in mountainous terrain.

Data retrieved from NASA's ASRS site as of April 2012 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.