Super King Air 200
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 100; Flight Crew Total 5800; Flight Crew Type 750
Human-Machine Interface
Deviation - Altitude Crossing Restriction Not Met; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented
Aircraft; Human Factors
Was cleared for RNAV 18 Approach at Little Rock. Crossed ALMOW INT at 2;700 feet. Descended to 1;900 for crossing at [RUZAL]. Tower comes over with altitude alert check altitude. Needles were lined up. Then descended down to 1;040 to cross ZEDEB the step down fix. Prior to reaching they tell me; 'Altitude alert. Check altitude.' Then descended down to 820 and realize the runway is over to my 10:30 to 11 o'clock position. Needle was still lined up. It was then that I realized that something was wrong with the equipment. KLN 90. Landed safely after visually seeing the runway.
The reporter believes that the approach was not properly activated and the display scale was not low enough to detect the error; resulting in early descents and deviation to the left of course.
King Air 200 pilot is advised by ATC to check altitude during descent to the first two stepdown fixes on the RNAV Runway 18 at LIT. At LNAV minimums the runway is sighted off to the left and a normal landing ensues. Post flight analysis reveals that the approach may not have been correctly activated and the display scale was too high to detect the error.