Narrative:

While operating in the 'waters' area of the atlantic; we were making position reports to new york commercial radio. After passing kraft intersection; we received a SELCAL and were told to slow to change our arrival time at holma intersection. After slowing to the lowest possible airspeed; our FMC 'holma' estimated time kept decreasing rather than increasing. After changing our estimate and conferring with new york commercial radio several times; we spoke to the new york controller who was actually handling our flight. He suggested that we check our clocks. I found my clock (captain's) in the 'time hold' position. I reset my clock and all FMC functions returned to normal. We checked our clocks before takeoff; and they seemed to be working normally for the first part of our flight. I finally figured out that because of the location of the clock; that I had kicked the run/hold switch to hold; while using the instrument panel lower foot rest which is located directly in front of the clock.

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Original NASA ASRS Text

Title: B767-200 RPTS FMC ESTIMATED TIME TO NEXT FIX WAS ILLOGICAL. DETERMINED CAPT'S CLOCK WHICH IS USED BY THE FMC FOR TIME CALCULATIONS WAS IN THE HOLD MODE.

Narrative: WHILE OPERATING IN THE 'WATERS' AREA OF THE ATLANTIC; WE WERE MAKING POS RPTS TO NEW YORK COMMERCIAL RADIO. AFTER PASSING KRAFT INTXN; WE RECEIVED A SELCAL AND WERE TOLD TO SLOW TO CHANGE OUR ARR TIME AT HOLMA INTXN. AFTER SLOWING TO THE LOWEST POSSIBLE AIRSPD; OUR FMC 'HOLMA' ESTIMATED TIME KEPT DECREASING RATHER THAN INCREASING. AFTER CHANGING OUR ESTIMATE AND CONFERRING WITH NEW YORK COMMERCIAL RADIO SEVERAL TIMES; WE SPOKE TO THE NEW YORK CTLR WHO WAS ACTUALLY HANDLING OUR FLT. HE SUGGESTED THAT WE CHK OUR CLOCKS. I FOUND MY CLOCK (CAPT'S) IN THE 'TIME HOLD' POS. I RESET MY CLOCK AND ALL FMC FUNCTIONS RETURNED TO NORMAL. WE CHKED OUR CLOCKS BEFORE TKOF; AND THEY SEEMED TO BE WORKING NORMALLY FOR THE FIRST PART OF OUR FLT. I FINALLY FIGURED OUT THAT BECAUSE OF THE LOCATION OF THE CLOCK; THAT I HAD KICKED THE RUN/HOLD SWITCH TO HOLD; WHILE USING THE INST PANEL LOWER FOOT REST WHICH IS LOCATED DIRECTLY IN FRONT OF THE CLOCK.

Data retrieved from NASA's ASRS site as of January 2009 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.