A passenger required oxygen on an oceanic flight and because all cabin walk around bottles were used...

Attributes
ACN	968892
Time
Date	201109
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Route In Use	Oceanic
Flight Plan	IFR
Component
Aircraft Component	Oxygen System/Portable
Person 1
Function	First Officer Pilot Flying
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Illness

Narrative:

One hour into the flight; a passenger complained of difficulty in breathing. The inflight crew used the available oxygen to allow the pax to breathe easier. Near the change over point; the flight attendants reported all of the oxygen bottles on board had been used down to 1;500 psi. Shortly after; we were informed that the one of the bottles required by the fom to be above 1;500 psi; had been used down to 250 psi. In accordance with the fom; we descended with ATC's permission to FL250. We did this after determining there would be sufficient fuel to reach the destination. We actually landed with more fuel than calculated; possibly due to flying at econ cruise speeds. No emergency was declared and no further incidents were noticed. The flight landed uneventfully.

Original NASA ASRS Text

Title: A passenger required oxygen on an oceanic flight and because all cabin walk around bottles were used to 1;500 PSI or less the aircraft was descended to FL250.

Narrative: One hour into the flight; a passenger complained of difficulty in breathing. The inflight crew used the available oxygen to allow the pax to breathe easier. Near the change over point; the flight attendants reported all of the oxygen bottles on board had been used down to 1;500 PSI. Shortly after; we were informed that the one of the bottles required by the FOM to be above 1;500 PSI; had been used down to 250 PSI. In accordance with the FOM; we descended with ATC's permission to FL250. We did this after determining there would be sufficient fuel to reach the destination. We actually landed with more fuel than calculated; possibly due to flying at ECON cruise speeds. No emergency was declared and no further incidents were noticed. The flight landed uneventfully.

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.

A passenger required oxygen on an oceanic flight and because all cabin walk around bottles were used to 1;500 psi or less the aircraft was descended to FL250.