<< >> NASA ASRS Report 922672, December 2010

A300 flight crew reports a track deviation after proceeding direct to a fix created to comply with a crossing restriction issued by ATC.

Attributes
ACN	922672
Time
Date	201012
Local Time Of Day	0601-1200
Place
Locale Reference	ZID.ARTCC
State Reference	IN
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	A300
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	IFR
Component
Aircraft Component	FMS/FMC
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Air Traffic Control Military 21 Air Traffic Control Radar 28 Flight Crew Last 90 Days 60 Flight Crew Total 10000 Flight Crew Type 7200
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Flight Engineer Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 75 Flight Crew Total 15000 Flight Crew Type 1000
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Clearance Deviation - Track / Heading All Types

Narrative:

[We were] cleared direct muncie (mie) from ZNY center to mie. ZOB center requested cross 105 east of mie at FL300. Crossing restriction was placed in airbus FMS. Aircraft turned approximately 8 degrees to left because FMS re-computes direct from great circle route since initial direct occurred over ZNY center airspace. Controller queried on why turn and I told him that the FMS had placed crossing restriction at that point but we would proceed direct to mie if he wanted us to. We proceeded direct to mie. We were told to contact ZID center of a possible deviation.

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Original NASA ASRS Text

Title: A300 flight crew reports a track deviation after proceeding direct to a fix created to comply with a crossing restriction issued by ATC.

Narrative: [We were] cleared direct Muncie (MIE) from ZNY Center to MIE. ZOB Center requested cross 105 east of MIE at FL300. Crossing restriction was placed in Airbus FMS. Aircraft turned approximately 8 degrees to left because FMS re-computes direct from great circle route since initial direct occurred over ZNY Center airspace. Controller queried on why turn and I told him that the FMS had placed crossing restriction at that point but we would proceed direct to MIE if he wanted us to. We proceeded direct to MIE. We were told to contact ZID Center of a possible deviation.

Data retrieved from NASA's ASRS site as of April 2012 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.