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DC9-30 in climb. Flight attendant advises flight crew that oxygen masks had dropped. PF, first officer had reached behind to retrieve a headset which was stowed on oxygen regulator and caught the manual drop knob.
| Attributes | |
| ACN | 352478 |
| Time | |
| Date | 199611 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zob |
| State Reference | OH |
| Altitude | msl bound lower : 21000 msl bound upper : 21000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 150 flight time total : 11670 flight time type : 3800 |
| ASRS Report | 352478 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa other other : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Lead flight attendant came up during climb out of FL210 (climbing to FL290), and said passenger oxygen masks were dropped. Annunciator panel showed blue 'cabin oxygen on' light, nothing else. Cabin altitude was about 4000 ft. Upon checking oxygen regulator area behind my seat, manual oxygen lever was up in manual. (Should have been down in 'automatic.') shortly before that I had reached back without looking (hand flying) and taken the headset from on top the regulator. Evidently the headset had caught on the manual drop knob when I remembered I'd had to give it a tug, and then had evidently deployed the masks. Storing the copilot headset on top of the oxygen regulator has been a common place for it. I won't do it anymore!
Original NASA ASRS Text
Title: DC9-30 IN CLB. FLT ATTENDANT ADVISES FLC THAT OXYGEN MASKS HAD DROPPED. PF, FO HAD REACHED BEHIND TO RETRIEVE A HEADSET WHICH WAS STOWED ON OXYGEN REGULATOR AND CAUGHT THE MANUAL DROP KNOB.
Narrative: LEAD FLT ATTENDANT CAME UP DURING CLBOUT OF FL210 (CLBING TO FL290), AND SAID PAX OXYGEN MASKS WERE DROPPED. ANNUNCIATOR PANEL SHOWED BLUE 'CABIN OXYGEN ON' LIGHT, NOTHING ELSE. CABIN ALT WAS ABOUT 4000 FT. UPON CHKING OXYGEN REGULATOR AREA BEHIND MY SEAT, MANUAL OXYGEN LEVER WAS UP IN MANUAL. (SHOULD HAVE BEEN DOWN IN 'AUTO.') SHORTLY BEFORE THAT I HAD REACHED BACK WITHOUT LOOKING (HAND FLYING) AND TAKEN THE HEADSET FROM ON TOP THE REGULATOR. EVIDENTLY THE HEADSET HAD CAUGHT ON THE MANUAL DROP KNOB WHEN I REMEMBERED I'D HAD TO GIVE IT A TUG, AND THEN HAD EVIDENTLY DEPLOYED THE MASKS. STORING THE COPLT HEADSET ON TOP OF THE OXYGEN REGULATOR HAS BEEN A COMMON PLACE FOR IT. I WON'T DO IT ANYMORE!
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.