Narrative:

Hypoxia due to air leak in L1 door the entire flight:just after 10;000 feet; I heard loud; sharp alarm sounding screech on a 737. After looking for source of alarm; checking lavatory; circuit breakers; switches on phone panel; feeling walls for heat (thinking it might be a fire alarm; though lavatory alarm not going off) was unable to locate anything other than loud; high pitch alarm sound near the forward L1 door. All rows in first class also heard and inquired what it was.I then called the captain immediately advising of the sound and that I was not able to immediately determine. He asked to come out; called to the back and flight attendant C came forward and guarded door; stating she felt dizzy and nauseous. After calling flight deck again to confirm flight deck door was guarded; I stood up and felt dizzy and woozy.captain came out; I went into the flight deck and I grabbed the spare oxygen mask in the flight deck. I felt anxious; woozy; and light headed. The captain examined and said it was a door leak and to stay away from the door; all would be okay. While I was in the flight deck the first officer told me everything up their looked fine and there shouldn't be an issue as they were breathing the same air and no lights were indicating a loss in cabin pressure. I stated to the first officer I didn't feel okay. He asked if I had ever heard the door whistle; I said yes; but this is a high pitched screeching alarm sound. Stated again I didn't feel well. I felt as though my concern for my safety was being a bit dismissed by the first officer.after 10 minutes; captain called and said he went a bit lower and I advised it was still screeching and would call if it stops. He advised to stay away from standing next to the door; I was in the galley continuing service. I am not sure being less than 5 feet away makes a difference.L1 door continued to screech the high pitched sound the entire flight (for an hour) while I continued service feeling what I describe as loopy; but filled with adrenalin. My entire first row of very large men were asleep with drinks in their hands on their tray tables; I noted. It was a very busy flight and the B and C flight attendants barely finished service. I was making a point to stay focused to keep my operations and responsibilities as the a safe; it did feel like it took extra focus.captain soon advised us we would have turbulence coming in to land; so to be cleaned up and seated soon after 18;000; which we did. The loud alarm sounding screeching from the door continued until about 10;000 feet when I noted it had finally stopped.upon door opening; a ground crew member was there and I noted he was eying the door as our passengers deplaned. Ground crew said he saw the problem; ice chunk in the door and the plane would have to meled.on the ground I felt 'high'; loopy; detached. I was scheduled to fly another turn and called crew scheduling immediately calling sick online as I did not feel safe to fly and conduct my operational duties safely; then called my supervisor and was put on workers comp. I then had a friend drive me to urgent care as I did not feel competent to drive. Doctor determined 'altitude sickness.'

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Original NASA ASRS Text

Title: B737 Flight Attendant experienced a loud screeching noise coming from the L1 door and informs the Captain. The Captain determined that the L1 door seal was leaking; but that pressurization was normal and the flight continued to destination. The Flight Attendant felt light headed and asked to be removed from the trip to see a doctor.

Narrative: Hypoxia due to air leak in L1 Door the entire flight:Just after 10;000 feet; I heard loud; sharp alarm sounding screech on a 737. After looking for source of alarm; checking lavatory; circuit breakers; switches on phone panel; feeling walls for heat (thinking it might be a fire alarm; though lavatory alarm not going off) was unable to locate anything other than loud; high pitch alarm sound near the forward L1 door. All rows in first class also heard and inquired what it was.I then called the Captain immediately advising of the sound and that I was not able to immediately determine. He asked to come out; called to the back and Flight Attendant C came forward and guarded door; stating she felt dizzy and nauseous. After calling flight deck again to confirm flight deck door was guarded; I stood up and felt dizzy and woozy.Captain came out; I went into the flight deck and I grabbed the spare oxygen mask in the flight deck. I felt anxious; woozy; and light headed. The Captain examined and said it was a door leak and to stay away from the door; all would be okay. While I was in the flight deck the First Officer told me everything up their looked fine and there shouldn't be an issue as they were breathing the same air and no lights were indicating a loss in cabin pressure. I stated to the First Officer I didn't feel okay. He asked if I had ever heard the door whistle; I said yes; but this is a high pitched screeching alarm sound. Stated again I didn't feel well. I felt as though my concern for my safety was being a bit dismissed by the First Officer.After 10 minutes; Captain called and said he went a bit lower and I advised it was still screeching and would call if it stops. He advised to stay away from standing next to the door; I was in the galley continuing service. I am not sure being less than 5 feet away makes a difference.L1 door continued to screech the high pitched sound the entire flight (for an hour) while I continued service feeling what I describe as loopy; but filled with adrenalin. My entire first row of very large men were asleep with drinks in their hands on their tray tables; I noted. It was a very busy flight and the B and C Flight Attendants barely finished service. I was making a point to stay focused to keep my operations and responsibilities as the A safe; it did feel like it took extra focus.Captain soon advised us we would have turbulence coming in to land; so to be cleaned up and seated soon after 18;000; which we did. The loud alarm sounding screeching from the door continued until about 10;000 feet when I noted it had finally stopped.Upon door opening; a ground crew member was there and I noted he was eying the door as our passengers deplaned. Ground crew said he saw the problem; ice chunk in the door and the plane would have to MELed.On the ground I felt 'high'; loopy; detached. I was scheduled to fly another turn and called crew scheduling immediately calling sick online as I did not feel safe to fly and conduct my operational duties safely; then called my supervisor and was put on workers comp. I then had a friend drive me to Urgent Care as I did not feel competent to drive. Doctor determined 'altitude sickness.'

Data retrieved from NASA's ASRS site 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.