<< >> NASA ASRS Report 966807, August 2011

Both A320 FMGC's on an A320 with the thales FMS release 1A installed locked up after a landing runway change entry; but subsequently reset after about a minute and a half.

Attributes
ACN	966807
Time
Date	201108
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	FMS/FMC
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

Flying aircraft with thales FMS release 1A; changed runway in FMC; mcdu froze upon entry of new runway; and did not switch ILS frequencies. The other mcdu was similarly frozen. About 1 1/2 minutes elapsed until entries were accepted and actions began to occur in the mcdu (unfroze). The thales box is non-airworthy and thales/airbus should be notified that this is so; and that they are responsible for the ramifications thereof.

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Original NASA ASRS Text

Title: Both A320 FMGC's on an A320 with the Thales FMS Release 1A installed locked up after a landing runway change entry; but subsequently reset after about a minute and a half.

Narrative: Flying aircraft with Thales FMS Release 1A; changed runway in FMC; MCDU froze upon entry of new runway; and did not switch ILS frequencies. The other MCDU was similarly frozen. About 1 1/2 minutes elapsed until entries were accepted and actions began to occur in the MCDU (unfroze). The Thales box is non-airworthy and Thales/Airbus should be notified that this is so; and that they are responsible for the ramifications thereof.

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.