37000 Feet

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On landing; the oxygen mask fell out of the passenger service unit above the forward flight attendant seat. Maintenance technician discovered the mask was unusable because a transportation pin was installed instead of the required initiation pin.

Narrative:

Oxygen mask above forward flight attendant jumpseat fell out of passenger service unit after landing. Mechanic discovered that the wrong pin was installed in the chemical O2 generator which would have prevented O2 flow to the mask during in-flight deployment. The mechanic explained that the transportation safety pin was installed instead of the required initiation pin. Was this an isolated mistake or is it indicative of a system failure; perhaps in depot maintenance?

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Original NASA ASRS Text

Title: On landing; the oxygen mask fell out of the passenger service unit above the forward flight attendant seat. Maintenance Technician discovered the mask was unusable because a transportation pin was installed instead of the required initiation pin.

Narrative: Oxygen mask above forward Flight Attendant jumpseat fell out of passenger service unit after landing. Mechanic discovered that the wrong pin was installed in the chemical O2 generator which would have prevented O2 flow to the mask during in-flight deployment. The mechanic explained that the transportation safety pin was installed instead of the required initiation pin. Was this an isolated mistake or is it indicative of a system failure; perhaps in depot maintenance?

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.