Narrative:

#2 in line for takeoff runway 26L, 'right pack inoperative' light illuminated and 'right pack inoperative' message appeared on EICAS display. FAA maintenance inspector riding on the jump seat. The first officer pulled out the non-normal checklist, turned to section 2 'air system' and followed the checklist. Procedure directed the pack selector to be placed to 'standby-north' at which time the EICAS message disappeared and pack light went out. Air conditioning pack function was restored and the autotemp function was indicated as inoperative. At this point, ATC cleared us for takeoff and the before takeoff checklist was completed. Aircraft was taxied onto runway and first officer made takeoff on runway 26L. Flight proceeded to dfw without incident. FAA inspector made no mention of incident. Malfunction was written up after flight in aircraft logbook. Far's prohibit operating a flight with a known malfunction. Time pressure from being in line at a busy major airport, a less than clear-cut indication that a malfunction still existed when all lights went out, and fatigue from being the last leg on a 4-DAY rotation all contributed to violating the far. Do not let controling agencies or other crew members rush the orderly accomplishment of checklists. Take time to ensure all requirements are complete any time an 'out of the ordinary' event occurs.

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Original NASA ASRS Text

Title: B757-200 CREW HAD A R PACK INOP EICAS MESSAGE BEFORE TKOF. THE CREW DID NOT GET THE MAINT CTLR TO MEL THE PROB. THERE WAS AN FAA MAINT INSPECTOR ON THE COCKPIT JUMP SEAT.

Narrative: #2 IN LINE FOR TKOF RWY 26L, 'R PACK INOP' LIGHT ILLUMINATED AND 'R PACK INOP' MESSAGE APPEARED ON EICAS DISPLAY. FAA MAINT INSPECTOR RIDING ON THE JUMP SEAT. THE FO PULLED OUT THE NON-NORMAL CHKLIST, TURNED TO SECTION 2 'AIR SYS' AND FOLLOWED THE CHKLIST. PROC DIRECTED THE PACK SELECTOR TO BE PLACED TO 'STANDBY-N' AT WHICH TIME THE EICAS MESSAGE DISAPPEARED AND PACK LIGHT WENT OUT. AIR CONDITIONING PACK FUNCTION WAS RESTORED AND THE AUTOTEMP FUNCTION WAS INDICATED AS INOP. AT THIS POINT, ATC CLRED US FOR TKOF AND THE BEFORE TKOF CHKLIST WAS COMPLETED. ACFT WAS TAXIED ONTO RWY AND FO MADE TKOF ON RWY 26L. FLT PROCEEDED TO DFW WITHOUT INCIDENT. FAA INSPECTOR MADE NO MENTION OF INCIDENT. MALFUNCTION WAS WRITTEN UP AFTER FLT IN ACFT LOGBOOK. FAR'S PROHIBIT OPERATING A FLT WITH A KNOWN MALFUNCTION. TIME PRESSURE FROM BEING IN LINE AT A BUSY MAJOR ARPT, A LESS THAN CLEAR-CUT INDICATION THAT A MALFUNCTION STILL EXISTED WHEN ALL LIGHTS WENT OUT, AND FATIGUE FROM BEING THE LAST LEG ON A 4-DAY ROTATION ALL CONTRIBUTED TO VIOLATING THE FAR. DO NOT LET CTLING AGENCIES OR OTHER CREW MEMBERS RUSH THE ORDERLY ACCOMPLISHMENT OF CHKLISTS. TAKE TIME TO ENSURE ALL REQUIREMENTS ARE COMPLETE ANY TIME AN 'OUT OF THE ORDINARY' EVENT OCCURS.

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