Narrative:

Flight was an medium large transport planned bna-san. Captain contacted me 5 mins west of abq to advise he was loosing cockpit oxygen. This aircraft was svced for the problem by air carrier bna maintenance prior to departure, but the corrective action did not correct the problem. Because the flight was at cruise altitude and west of abq and the associated maintenance and aircraft resource considerations (air carrier maintenance and another aircraft to utilize if this one went OTS) I after contact with tul technical, asked the captain if he could make phx. He said affirmative and I then rereleased him to phx. Approximately 30 mins later the captain recontacted me through arinc to inquire why could he not continue to san at 10000 ft. I told him I believed cockpit oxygen was required for potential smoke in the cockpit but would confirm with tul technician. Technician told (reconfirmed) that was the case and I sent an ACARS message to the captain stating the same and that if he wished to continue the decision was his. This brings up the problem. In order to compute burn information, I had to manually construct a low level route utilizing victor airways amd interpolate what his fuel burn would be from the new composite flight plan (both high:low). I told him that his arrival fuel would be between 5500-6000 pounds and what it consisted of, 45 mins reserve 30 mins hold alternate none. San was 33 broken visibility more than 6 mi. I had forgotten to revise my earlier re-release to phx. Flight landed san and arrived at gate with 5700 pounds fuel without further incident. I am following up with company to get a procedure for loss of cockpit oxygen. Next time I will slow down, DOT the I's and cross the T's.

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Original NASA ASRS Text

Title: ACR FLT PROCEEDS ON TO DEST WITH LOW CREW OXYGEN AT 10000 FT AFTER HAVING RECEIVED A RE-RELEASE FOR DIVERSION TO ALTERNATE ARPT.

Narrative: FLT WAS AN MLG PLANNED BNA-SAN. CAPT CONTACTED ME 5 MINS W OF ABQ TO ADVISE HE WAS LOOSING COCKPIT OXYGEN. THIS ACFT WAS SVCED FOR THE PROB BY ACR BNA MAINT PRIOR TO DEP, BUT THE CORRECTIVE ACTION DID NOT CORRECT THE PROB. BECAUSE THE FLT WAS AT CRUISE ALT AND W OF ABQ AND THE ASSOCIATED MAINT AND ACFT RESOURCE CONSIDERATIONS (ACR MAINT AND ANOTHER ACFT TO UTILIZE IF THIS ONE WENT OTS) I AFTER CONTACT WITH TUL TECHNICAL, ASKED THE CAPT IF HE COULD MAKE PHX. HE SAID AFFIRMATIVE AND I THEN RERELEASED HIM TO PHX. APPROX 30 MINS LATER THE CAPT RECONTACTED ME THROUGH ARINC TO INQUIRE WHY COULD HE NOT CONTINUE TO SAN AT 10000 FT. I TOLD HIM I BELIEVED COCKPIT OXYGEN WAS REQUIRED FOR POTENTIAL SMOKE IN THE COCKPIT BUT WOULD CONFIRM WITH TUL TECHNICIAN. TECHNICIAN TOLD (RECONFIRMED) THAT WAS THE CASE AND I SENT AN ACARS MESSAGE TO THE CAPT STATING THE SAME AND THAT IF HE WISHED TO CONTINUE THE DECISION WAS HIS. THIS BRINGS UP THE PROB. IN ORDER TO COMPUTE BURN INFO, I HAD TO MANUALLY CONSTRUCT A LOW LEVEL RTE UTILIZING VICTOR AIRWAYS AMD INTERPOLATE WHAT HIS FUEL BURN WOULD BE FROM THE NEW COMPOSITE FLT PLAN (BOTH HIGH:LOW). I TOLD HIM THAT HIS ARR FUEL WOULD BE BTWN 5500-6000 LBS AND WHAT IT CONSISTED OF, 45 MINS RESERVE 30 MINS HOLD ALTERNATE NONE. SAN WAS 33 BROKEN VISIBILITY MORE THAN 6 MI. I HAD FORGOTTEN TO REVISE MY EARLIER RE-RELEASE TO PHX. FLT LANDED SAN AND ARRIVED AT GATE WITH 5700 LBS FUEL WITHOUT FURTHER INCIDENT. I AM FOLLOWING UP WITH COMPANY TO GET A PROC FOR LOSS OF COCKPIT OXYGEN. NEXT TIME I WILL SLOW DOWN, DOT THE I'S AND CROSS THE T'S.

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.