Regional Jet 900 (CRJ900)
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 3
Confusion; Situational Awareness
ATC Issue All Types; Deviation - Altitude Undershoot; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance; Flight Crew Returned To Clearance
Human Factors
Aircraft X checked onto Departure and was instructed to 'Climb via SID'. Aircraft X two minutes later leveled at 100. When Approach asked why they leveled at 10;000 [feet]; they cited the previous clearance instructed them to maintain 10;000 [feet]. They were then told to climb via SID; top altitude FL200 and they then understood the instructions. Aircraft on clearance should be instructed to 'Climb via Sid' with no altitude restrictions; and if Approach needs an altitude restriction this will be given upon aircraft check in.-OR-All pilots need to be on the same page that when Departure clears an aircraft to 'Climb via SID' this deletes the clearance delivery restriction previously given.
ABQ TRACON Controller reported an aircraft leveling at a lower altitude then assigned and questioning why they stopped their climb.