Narrative:

Prior to leaving hotel; reviewed company memo on departures out of las. I thought I had a clear understanding of issues involved. During preflight; read NOTAMS and saw different verbiage than depicted on departure chart. Amended FMS to what I believed the NOTAM said and asked sic who was the pilot flying to verify my understanding and changes to FMS. He did so and concurred. The departure was the SHEAD7 off of runway 1L. Departed normally and discovered error when ATC notified us of non-compliance with altitude restrictions. The changes in the FMS resulted in the deviation. After reading the NOTAM; I erroneously translated the information as to how it would be depicted on the chart. Thinking the NOTAM had more current information led me to the wrong conclusion. It had some supplemental information but a correct reading would have shown me that the altitude restrictions still applied. After the event; TRACON was able to coordinate with arrival sector and no loss of separation occurred. We were given a phone number to call and did so after the flight. Talked with a specialist and the operations manager and they both said this type of deviation happens frequently. I am aware of my errors in this event and accept responsibility. I would suggest that only one altitude be depicted on chart for any given fix. Place engine out/minimum reception information on another section of the chart or perhaps another page entirely. Limit NOTAM information to the minimum necessary for safety. Once information is capable of being printed on charts; rescind the NOTAM. Currently; printing the NOTAMS for las results in more than three pages of information. I should have reviewed the company memo again in the cockpit. The review between the pilots was accomplished but could have been more thorough. A more detailed review may have caught the error.

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Original NASA ASRS Text

Title: A G-450 flight crew misinterpreted NOTAMS and a company bulletin regarding LAS SIDs and suffered an altitude deviation as a result.

Narrative: Prior to leaving hotel; reviewed company memo on departures out of LAS. I thought I had a clear understanding of issues involved. During preflight; read NOTAMS and saw different verbiage than depicted on departure chart. Amended FMS to what I believed the NOTAM said and asked SIC who was the pilot flying to verify my understanding and changes to FMS. He did so and concurred. The departure was the SHEAD7 off of Runway 1L. Departed normally and discovered error when ATC notified us of non-compliance with altitude restrictions. The changes in the FMS resulted in the deviation. After reading the NOTAM; I erroneously translated the information as to how it would be depicted on the chart. Thinking the NOTAM had more current information led me to the wrong conclusion. It had some supplemental information but a correct reading would have shown me that the altitude restrictions still applied. After the event; TRACON was able to coordinate with arrival sector and no loss of separation occurred. We were given a phone number to call and did so after the flight. Talked with a specialist and the Operations Manager and they both said this type of deviation happens frequently. I am aware of my errors in this event and accept responsibility. I would suggest that only one altitude be depicted on chart for any given fix. Place engine out/minimum reception information on another section of the chart or perhaps another page entirely. Limit NOTAM information to the minimum necessary for safety. Once information is capable of being printed on charts; rescind the NOTAM. Currently; printing the NOTAMS for LAS results in more than three pages of information. I should have reviewed the company memo again in the cockpit. The review between the pilots was accomplished but could have been more thorough. A more detailed review may have caught the error.

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.