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A B737-700 flight crew inbound to atl on the koltt RNAV STAR; precision runway monitor (prm) runway 08L received a last second runway change to 09R which requires an entirely different routing from koltt and branches off the common portion of the STAR 3.3NM sooner than required for 08L. Unable to complete the altered programming and immediately cleared for the prm runway 09R approach the FMS was unable to direct the ~80 degree course change required at andiy. The flight crew struggled to manually make the adjustment and ATC simultaneously provided a vector in a commingled attempt to save the arrival and maintain separation with other aircraft. Both pilots cited the difficulty associated with complying with very late runway change assignments on complex RNAV stars.
| Attributes | |
| ACN | 1243325 |
| Time | |
| Date | 201503 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ATL.Airport |
| State Reference | GA |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | First Officer |
| Experience | Flight Crew Last 90 Days 235 |
| Person 2 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 198 Flight Crew Type 10000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types |
Narrative:
During the arrival on the koltt RNAV into atlanta; ATC changed the transition from 08L to 09R. While sequencing us for the ILS prm 09R; just prior to andiy; ATC had us slow from 250 knots to 210 knots and also cleared us to descend from 8000 feet to 6000 feet. Just moments prior to reaching andiy; we were cleared for the ILS prm 09R approach. Once cleared; we closed the discontinuity but the aircraft didn't start the turn toward dfins. The FMS was in LNAV and VNAV. Upon reaching andiy and noticing the aircraft not turning toward dfins; we initiated a turn to dfins. Simultaneously; ATC provided us with a vector. We landed without any further complications.an earlier clearance for the ILS prm 09R would have mitigated this incident. Even with the FMS programmed correctly with the discontinuity after dfins; the 09R transition; the legs page and navigation display (nd) displayed the correct routing; navvy; andiy; and then dfins. Upon receiving clearance and closing the discontinuity; the aircraft didn't turn to dfins; which led us to initiate a turn and ATC providing us a vector.
Original NASA ASRS Text
Title: A B737-700 flight crew inbound to ATL on the KOLTT RNAV STAR; Precision Runway Monitor (PRM) runway 08L received a last second runway change to 09R which requires an entirely different routing from KOLTT and branches off the common portion of the STAR 3.3NM sooner than required for 08L. Unable to complete the altered programming and immediately cleared for the PRM Runway 09R approach the FMS was unable to direct the ~80 degree course change required at ANDIY. The flight crew struggled to manually make the adjustment and ATC simultaneously provided a vector in a commingled attempt to save the arrival and maintain separation with other aircraft. Both pilots cited the difficulty associated with complying with very late runway change assignments on complex RNAV STARs.
Narrative: During the arrival on the KOLTT RNAV into Atlanta; ATC changed the transition from 08L to 09R. While sequencing us for the ILS PRM 09R; just prior to ANDIY; ATC had us slow from 250 knots to 210 knots and also cleared us to descend from 8000 feet to 6000 feet. Just moments prior to reaching ANDIY; we were cleared for the ILS PRM 09R approach. Once cleared; we closed the discontinuity but the aircraft didn't start the turn toward DFINS. The FMS was in LNAV and VNAV. Upon reaching ANDIY and noticing the aircraft not turning toward DFINS; we initiated a turn to DFINS. Simultaneously; ATC provided us with a vector. We landed without any further complications.An earlier clearance for the ILS PRM 09R would have mitigated this incident. Even with the FMS programmed correctly with the discontinuity after DFINS; the 09R transition; the LEGS page and Navigation Display (ND) displayed the correct routing; NAVVY; ANDIY; and then DFINS. Upon receiving clearance and closing the discontinuity; the aircraft didn't turn to DFINS; which led us to initiate a turn and ATC providing us a vector.
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.