Cessna 425/441 Conquest I/Conquest II
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Flight Instructor
Flight Crew Last 90 Days 40; Flight Crew Total 9300; Flight Crew Type 775
Confusion; Distraction
Deviation - Altitude Crossing Restriction Not Met; Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Became Reoriented
Human Factors
Departed KVGT via Northtown 3 SID; climb via SID [expect 7;000]. I may have missed the Maximum altitude at RUZCO of 5;000 feet and continued to climb to 7;000. I believe that ATC had given me a higher altitude above 5;000 shortly after I contacted LAS departure; which would have negated the level off at 5;000.  I was given the SID by ground control after engine start up which meant I had to review the SID in an environment not conducive to retaining all necessary altitudes and procedures.  I should have rejected the SID as I was Single pilot in a busy ATC B airspace.  Climb via SID's are designed to make it easier for ATC; not the Pilot and a complex one like the NOTWN3 should be flown with a crew of 2 to ensure compliance with restrictions.
Single pilot C441 pilot departing VGT believes he may have climbed above 5;000 feet at RUZCO while on the NOTWN3 SID.  Reporter believes ATC gave him initial altitude of 7000 feet which he believes contributed to the altitude bust. Reporter also cites receiving the SID after engine start leaving very little time to brief new routing.