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An MD11 flight crew had difficulty donning the oxygen mask to inspect a noise in the cargo area hear hvq.
| Attributes | |
| ACN | 450406 |
| Time | |
| Date | 199909 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : hvq.vor |
| State Reference | WV |
| Altitude | msl single value : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 125 flight time total : 16500 flight time type : 2600 |
| ASRS Report | 450406 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | other other : 3 |
| Resolutory Action | none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Cruise flight at FL350 over hvq swbound loud bang in cargo compartment. Followed by a second 5-10 min later. No alerts or any indications of fumes or source of noise. There was hazmat in a dedicated container so a jump seat passenger was brought forward. 100% oxygen was used and aircraft descended to obtain lower cabin altitude as a precaution. As there were no secondary indications of a problem, aircraft continued to destination at lower altitude, crew on oxygen. Nothing was found during cargo offload and detailed postflt aircraft inspection. Suspect heavy cargo shifted or fell in container. Lessons learned: glasses and oxygen masks are not a good combination for new users. Callback conversation with reporter revealed the following information: the reporter stated the air carrier is in the process of replacing the goggles and oxygen mask with a full face mask unit which is quicker and user friendly to those that require glasses.
Original NASA ASRS Text
Title: AN MD11 FLC HAD DIFFICULTY DONNING THE OXYGEN MASK TO INSPECT A NOISE IN THE CARGO AREA HEAR HVQ.
Narrative: CRUISE FLT AT FL350 OVER HVQ SWBOUND LOUD BANG IN CARGO COMPARTMENT. FOLLOWED BY A SECOND 5-10 MIN LATER. NO ALERTS OR ANY INDICATIONS OF FUMES OR SOURCE OF NOISE. THERE WAS HAZMAT IN A DEDICATED CONTAINER SO A JUMP SEAT PAX WAS BROUGHT FORWARD. 100% OXYGEN WAS USED AND ACFT DSNDED TO OBTAIN LOWER CABIN ALT AS A PRECAUTION. AS THERE WERE NO SECONDARY INDICATIONS OF A PROB, ACFT CONTINUED TO DEST AT LOWER ALT, CREW ON OXYGEN. NOTHING WAS FOUND DURING CARGO OFFLOAD AND DETAILED POSTFLT ACFT INSPECTION. SUSPECT HVY CARGO SHIFTED OR FELL IN CONTAINER. LESSONS LEARNED: GLASSES AND OXYGEN MASKS ARE NOT A GOOD COMBINATION FOR NEW USERS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACR IS IN THE PROCESS OF REPLACING THE GOGGLES AND OXYGEN MASK WITH A FULL FACE MASK UNIT WHICH IS QUICKER AND USER FRIENDLY TO THOSE THAT REQUIRE GLASSES.
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.