Over the duration of the flight all eight flight attendants aboard a B767-300ER complained of light ...

Narrative:

From level off at FL350; 4 flight attendants complained of light-headedness and dizziness. The cabin was at 5;000 throughout the flight and we elected to turn off the recirc fans for an increase in 'fresh air'. The captain advised them to take a seat and rest for a while and let us know if they got worse or needed us to divert. We contacted dispatch and kept them apprised. At about 2 hours we now had 6 flight attendants with this issue. Again the captain asked if they were ok to work; or should we divert. They advised that they were ok to continue. By the time we had to hold for weather just outside our destination; all 8 of the flight attendants felt sick. After a few turns in the hold; the captain received a call that 3 flight attendants were on supplemental O2 and others were feeling worse. Rather than hold for an efc of 30 minutes; the captain declared a medical emergency and we were immediately given a vector for the runway. At no time did the captain or I feel anything unusual as well as no complaints from any of the 200 plus passengers. As per our request; medical met the flight attendants at the gate.

Original NASA ASRS Text

Title: Over the duration of the flight all eight Flight Attendants aboard a B767-300ER complained of light headedness and dizziness. An emergency declaration expedited their arrival at their destination.

Narrative: From level off at FL350; 4 flight attendants complained of light-headedness and dizziness. The cabin was at 5;000 throughout the flight and we elected to turn off the recirc fans for an increase in 'fresh air'. The Captain advised them to take a seat and rest for a while and let us know if they got worse or needed us to divert. We contacted Dispatch and kept them apprised. At about 2 hours we now had 6 flight attendants with this issue. Again the Captain asked if they were OK to work; or should we divert. They advised that they were OK to continue. By the time we had to hold for weather just outside our destination; all 8 of the flight attendants felt sick. After a few turns in the hold; the Captain received a call that 3 flight attendants were on supplemental O2 and others were feeling worse. Rather than hold for an EFC of 30 minutes; the Captain declared a medical emergency and we were immediately given a vector for the runway. At no time did the Captain or I feel anything unusual as well as no complaints from any of the 200 plus passengers. As per our request; medical met the flight attendants at the gate.

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.

Attributes
ACN	944040
Time
Date	201104
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Person 1
Function	First Officer
Person 2
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Flight Deck / Cabin / Aircraft Event Illness

Over the duration of the flight all eight flight attendants aboard a B767-300ER complained of light headedness and dizziness. An emergency declaration expedited their arrival at their destination.