Air carrier flight crew reported aircraft was not turning at drkar while on the RNAV Y 26R arrival t...

Attributes
ACN	1716018
Time
Date	202001
Local Time Of Day	0601-1200
Place
Locale Reference	IAH.Airport
State Reference	TX
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Component
Aircraft Component	FMS/FMC
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 229 Flight Crew Total 6346 Flight Crew Type 3706
Person 2
Function	Pilot Flying Captain
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 124 Flight Crew Total 1942 Flight Crew Type 124
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Clearance Deviation - Track / Heading All Types

Narrative:

Flying from ZZZ to iah we planned to descend via the mascot 4 arrival to runway 27. We were switched to the drllr 5 arrival. Later we were then given runway 26R so we set up for the ILS 26R. Switched again to RNAV Y 26R; so we reloaded and confirmed the box was correct. Given direct skler 6;000 feet @ 210 kts. Once we got to 6;000 cleared RNAV 26R after skler. Passed over skler and proceeded to next point drkar. For some reason the aircraft didn't turn and the FMC said vectors then drkar. Captain immediately clicked off autopilot and then ATC gave us a right turn to fly visual 26R. Gave another turn to intercept the localizer and then cleared us visual runway 26R. The rest of the approach and landing was uneventful. We don't know how the fix sequence changed during the approach. After debriefing; captain called and they said some aircraft have been having problems with this approach and trying to figure out why. They did not have a problem with us just wanted more information to figure out this ongoing problem.

Original NASA ASRS Text

Title: Air carrier flight crew reported aircraft was not turning at DRKAR while on the RNAV Y 26R arrival to IAH airport. ATC advised the flight crew of problems with some aircraft not turning correctly at that fix.

Narrative: Flying from ZZZ to IAH we planned to descend via the Mascot 4 arrival to Runway 27. We were switched to the DRLLR 5 arrival. Later we were then given Runway 26R so we set up for the ILS 26R. Switched again to RNAV Y 26R; so we reloaded and confirmed the box was correct. Given direct SKLER 6;000 feet @ 210 kts. Once we got to 6;000 cleared RNAV 26R after SKLER. Passed over SKLER and proceeded to next point DRKAR. For some reason the aircraft didn't turn and the FMC said vectors then DRKAR. Captain immediately clicked off autopilot and then ATC gave us a right turn to fly visual 26R. Gave another turn to intercept the LOC and then cleared us visual Runway 26R. The rest of the approach and landing was uneventful. We don't know how the fix sequence changed during the approach. After debriefing; Captain called and they said some aircraft have been having problems with this approach and trying to figure out why. They did not have a problem with us just wanted more information to figure out this ongoing problem.

Data retrieved from NASA's ASRS site 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.

Air carrier flight crew reported aircraft was not turning at drkar while on the RNAV Y 26R arrival to iah airport. ATC advised the flight crew of problems with some aircraft not turning correctly at that fix.