B737 Undifferentiated or Other Model
Flight Crew Last 90 Days 193; Flight Crew Total 2603; Flight Crew Type 300
Human-Machine Interface
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance; Flight Crew Returned To Clearance; Flight Crew Became Reoriented
Aircraft; Human Factors
RWY 08 YOKES4 DEHLI transition. All was entered and checked for proper entry and there were no discontinuities to repair on the legs page. Tower cleared us for takeoff; turn left heading 065 degrees. We were then cleared direct YOKES climb and maintain FL230. Approximately 5 minutes after YOKES Denver center asked what fix we were going to. The FMC was programmed direct ONL after YOKES. The FMC dropped two fixes between YOKES and ONL; DEHLI was no longer in the legs page. I do not know when this took place. Center then asked us if we had a runway change. We did not. They stated that this has been occurring for about one year. If this is true; why am I just now hearing about this? I do not know if this is an FMC anomaly; if so it needs to be addressed so it doesn't continue happening. If this has been occurring for a year why hasn't it already been addressed?
B737 Captain reports being cleared via the YOKES4 DEHLI transition; departing Runway 8 at DEN. After YOKES the aircraft proceeds direct to ONL; since the DEHLI transition had been eliminated from the FMC. ATC takes notice and states that this has been occurring for about a year.