An A300 first officer reported crossing dylan high on the phlbo 3 RNAV arrival due to strong tailwin...

Narrative:

Cleared to descend via PHLBO3 RNAV arrival into ewr for an ILS 04L approach. Captain was pilot flying. Used max automation due to poor weather. Autopilot number 1 was engaged with navigation and profile selected. We made the somto intersection crossing restriction at 11;000 ft with no problem. Shortly after somto we still had a tailwind and also encountered an area of heavy rain and moderate turbulence. We were night IMC conditions with engine anti ice on and static electricity on the windshield. Captain disconnected the autopilot and manually began flying the aircraft when he realized the FMS in profile mode would not make the crossing restriction at dylin of 8;000 ft. Had he allowed the autopilot and profile to stay engaged it probably would have crossed dylin at least 1;500 ft high. First officer called ATC and told controller we were in heavy rain with moderate turbulence and that we crossed dylin intersection 500 ft high. No traffic was noted on the TCAS within a 12 mile range; we had no loss of separation; and controller didn't say anything about it. He gave us a vector to final approach for ILS 04L. Profile mode in the airbus apparently cannot handle strong tailwinds; updrafts and turbulence. In retrospect; one level less of automation might have helped (using level change with step down altitudes); but the situation we encountered would probably still have required an autopilot disconnect.

Original NASA ASRS Text

Title: An A300 First Officer reported crossing DYLAN high on the PHLBO 3 RNAV arrival due to strong tailwinds and turbulence. The Captain was the pilot flying using LNAV and VNAV. The autopilot was disconnected in an attempt to make the restriction.

Narrative: Cleared to descend via PHLBO3 RNAV Arrival into EWR for an ILS 04L approach. Captain was pilot flying. Used max automation due to poor weather. Autopilot Number 1 was engaged with NAV and Profile selected. We made the SOMTO Intersection crossing restriction at 11;000 FT with no problem. Shortly after SOMTO we still had a tailwind and also encountered an area of heavy rain and moderate turbulence. We were night IMC conditions with engine anti ice on and static electricity on the windshield. Captain disconnected the autopilot and manually began flying the aircraft when he realized the FMS in Profile mode would not make the crossing restriction at DYLIN of 8;000 FT. Had he allowed the autopilot and profile to stay engaged it probably would have crossed DYLIN at least 1;500 FT high. First Officer called ATC and told Controller we were in heavy rain with moderate turbulence and that we crossed DYLIN intersection 500 FT high. No traffic was noted on the TCAS within a 12 mile range; we had no loss of separation; and Controller didn't say anything about it. He gave us a vector to final approach for ILS 04L. Profile mode in the Airbus apparently cannot handle strong tailwinds; updrafts and turbulence. In retrospect; one level less of automation might have helped (using level change with step down altitudes); but the situation we encountered would probably still have required an autopilot disconnect.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1056721
Time
Date	201212
Local Time Of Day	0001-0600
Place
Locale Reference	N90.TRACON
State Reference	NY
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	A300
Operating Under FAR Part	Part 121
Flight Phase	Descent
Component
Aircraft Component	Autoflight System
Person 1
Function	First Officer Pilot Not Flying
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Undershoot Deviation - Procedural Published Material / Policy Inflight Event / Encounter Weather / Turbulence

An A300 first officer reported crossing dylan high on the phlbo 3 RNAV arrival due to strong tailwinds and turbulence. The captain was the pilot flying using LNAV and VNAV. The autopilot was disconnected in an attempt to make the restriction.