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Cabin attendant reports that O2 masks failed to deploy in a timely fashion during loss of pressurization incident on B757.
| Attributes | |
| ACN | 772684 |
| Time | |
| Date | 200801 |
| Place | |
| Locale Reference | airport : zzzz.airport |
| State Reference | FO |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight attendant : on duty |
| Qualification | flight attendant : currently qualified flight attendant aircraft qualified on : 4 |
| Experience | flight attendant time airline total : 23 flight attendant time total : 23 flight attendant time type : 30 |
| ASRS Report | 772684 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa other other : 1 |
| Resolutory Action | flight crew : overcame equipment problem flight crew : diverted to another airport |
| Consequence | other |
| Supplementary | |
| Problem Areas | Cabin Crew Human Performance Company Aircraft Passenger Human Performance |
| Primary Problem | Aircraft |
Narrative:
Approximately 20 mins after takeoff; the captain made announcement for the passenger and crew to take (use) their oxygen masks. I looked into the cabin and the oxygen masks had not dropped. I called the pilots (without them acknowledging me) and said 'the masks did not drop!' but felt I wasn't being heard. The #4 flight attendant and I put on our supplemental oxygen units; and proceeded to help the passenger. By the time I got to my first passenger; their oxygen masks had finally dropped; and they were trying to put them on. I helped all of the passenger with their masks; with the help of the other flight attendants. When all of the passenger were checked; we noticed 'a slight fog' of smoke in the top 1/3 of the cabin. I thought it was from the activation of the oxygen units. We (flight attendants) made sure everyone was all right; and then the airplane landed back in ZZZZ. It was a very stressful situation when the pilot made his announcement to take oxygen; and the oxygen masks did not drop. Passenger were trying to pry the ceiling units open to obtain their masks. No one suffered from hypoxia. Apparently the airplane's left pack and bleed were on placard and subsequently the right prsov failed; thus no air coming in from the engines.
Original NASA ASRS Text
Title: CABIN ATTENDANT REPORTS THAT O2 MASKS FAILED TO DEPLOY IN A TIMELY FASHION DURING LOSS OF PRESSURIZATION INCIDENT ON B757.
Narrative: APPROX 20 MINS AFTER TKOF; THE CAPT MADE ANNOUNCEMENT FOR THE PAX AND CREW TO TAKE (USE) THEIR OXYGEN MASKS. I LOOKED INTO THE CABIN AND THE OXYGEN MASKS HAD NOT DROPPED. I CALLED THE PLTS (WITHOUT THEM ACKNOWLEDGING ME) AND SAID 'THE MASKS DID NOT DROP!' BUT FELT I WASN'T BEING HEARD. THE #4 FLT ATTENDANT AND I PUT ON OUR SUPPLEMENTAL OXYGEN UNITS; AND PROCEEDED TO HELP THE PAX. BY THE TIME I GOT TO MY FIRST PAX; THEIR OXYGEN MASKS HAD FINALLY DROPPED; AND THEY WERE TRYING TO PUT THEM ON. I HELPED ALL OF THE PAX WITH THEIR MASKS; WITH THE HELP OF THE OTHER FLT ATTENDANTS. WHEN ALL OF THE PAX WERE CHKED; WE NOTICED 'A SLIGHT FOG' OF SMOKE IN THE TOP 1/3 OF THE CABIN. I THOUGHT IT WAS FROM THE ACTIVATION OF THE OXYGEN UNITS. WE (FLT ATTENDANTS) MADE SURE EVERYONE WAS ALL RIGHT; AND THEN THE AIRPLANE LANDED BACK IN ZZZZ. IT WAS A VERY STRESSFUL SITUATION WHEN THE PLT MADE HIS ANNOUNCEMENT TO TAKE OXYGEN; AND THE OXYGEN MASKS DID NOT DROP. PAX WERE TRYING TO PRY THE CEILING UNITS OPEN TO OBTAIN THEIR MASKS. NO ONE SUFFERED FROM HYPOXIA. APPARENTLY THE AIRPLANE'S L PACK AND BLEED WERE ON PLACARD AND SUBSEQUENTLY THE R PRSOV FAILED; THUS NO AIR COMING IN FROM THE ENGS.
Data retrieved from NASA's ASRS site as of May 2009 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.