Narrative:

The controller asked us to intercept a radial to the fellows VOR. Both pilots attempted to reprogram the flight management system, but failed. Neither pilot realized that we had passed the assigned intercept point until the controller assigned a new heading to reintercept the radial. Moral of the story: one pilot should always be following the aircraft's progress using 'raw data,' so that an FMS malfunction can be discovered quickly.

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Original NASA ASRS Text

Title: CTLR CLEARED ACFT TO INTERCEPT RADIAL WHICH REQUIRES REPROGRAM FMC. NEITHER PLT FLYING ACFT USING RAW DATA AND FLEW PAST RADIAL.

Narrative: THE CTLR ASKED US TO INTERCEPT A RADIAL TO THE FELLOWS VOR. BOTH PLTS ATTEMPTED TO REPROGRAM THE FLT MGMNT SYS, BUT FAILED. NEITHER PLT REALIZED THAT WE HAD PASSED THE ASSIGNED INTERCEPT POINT UNTIL THE CTLR ASSIGNED A NEW HDG TO REINTERCEPT THE RADIAL. MORAL OF THE STORY: ONE PLT SHOULD ALWAYS BE FOLLOWING THE ACFT'S PROGRESS USING 'RAW DATA,' SO THAT AN FMS MALFUNCTION CAN BE DISCOVERED QUICKLY.

Data retrieved from NASA's ASRS site as of August 2007 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.