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Lead technician reported that an incorrect O2 mask was installed on the portable oxygen bottle in a crj-900.
| Attributes | |
| ACN | 1531763 |
| Time | |
| Date | 201804 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | Regional Jet 900 (CRJ900) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Flight Plan | None |
| Component | |
| Aircraft Component | Oxygen System/Portable |
| Person 1 | |
| Function | Lead Technician |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural FAR Deviation - Procedural Published Material / Policy |
Narrative:
The flight crew wrote up that the wrong oxygen (O2) mask was installed at the aft portable O2 bottle. Outstation maintenance deferred the mask. The aircraft then flew to here; where it is currently [in] a hangar routine overnight check. I realized there was an open MEL for the mask and went to investigate myself. I walked to the back of the aircraft and saw that the 4 lpm (liters per minute) bag was tagged inoperative and a solid tube was sticking out of the bag; indicating that a demo O2 mask was installed. I took a photo of what I found and verified that the bottle's serial number; location installed; and date. A demo mask was installed in place of a 4 lpm oxygen mask. Mask installation requires an operational check; and the 4 lpm mask is supposed to remain connected to the bottle. This was missed by multiple flight crews. A new 4 lpm mask has been ordered and I delegated replacement to one of our technicians.
Original NASA ASRS Text
Title: Lead Technician reported that an incorrect O2 mask was installed on the portable oxygen bottle in a CRJ-900.
Narrative: The flight crew wrote up that the wrong Oxygen (O2) mask was installed at the aft portable O2 bottle. Outstation maintenance deferred the mask. The aircraft then flew to here; where it is currently [in] a hangar Routine Overnight check. I realized there was an open MEL for the mask and went to investigate myself. I walked to the back of the aircraft and saw that the 4 LPM (Liters Per Minute) bag was tagged INOP and a solid tube was sticking out of the bag; indicating that a demo O2 mask was installed. I took a photo of what I found and verified that the bottle's Serial Number; location installed; and date. A demo mask was installed in place of a 4 LPM oxygen mask. Mask installation requires an operational check; and the 4 LPM mask is supposed to remain connected to the bottle. This was missed by multiple flight crews. A new 4 LPM mask has been ordered and I delegated replacement to one of our technicians.
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.