Narrative:

I wrote write-up zone 240 on jul/mon/00 regarding contamination of exterior low pressure oxygen manifolds in 'C' zone. I was reinstalling psu's which had been removed during the check when I noticed the dinol contamination. Jul/tue/00 a mechanic who was working the card, asked me to confirm an area of corrosion on the aft right section of the 'C' zone passenger oxygen manifold. There was light corrosion there. I have experience with corrosion on oxygen manifolds. Management was informed via my lead. Management contacted engineering. Engineering and management wanted to know why I had written a report for the dinol contamination when the job card didn't require that to be checked out. I referred them to boeing maintenance manual regarding oxygen system cleanliness as well as a boeing publication regarding 'dinol contamination of oxygen lines.' the engineer left to research the problem (corrosion). My shift was over and my vacation started the next day. I was back from vacation and asked about the corrosion. My crew mates told me they didn't believe a card had been written for it. Inspection department doesn't believe there are any required inspections for corrosion of oxygen system components. I saw the corrosion, my lead saw it, inspection saw it, engineering saw it, management saw it. We mechanics and inspection don't think it's an immediate safety hazard. I would guess level 1-2 corrosion at this time, but it should be addressed before too long. The passenger oxygen system passed low pressure manifold leak check as well as system check. A card should have been written and the corrosion removed. The aircraft was running late in check and this was something that management probably didn't want to deal with.

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Original NASA ASRS Text

Title: A B747-200 WAS DISPATCHED IN NON COMPLIANCE WITH LIGHT CORROSION ON C ZONE PAX OXYGEN MANIFOLD LINES NOT DEFERRED OR CORRECTED.

Narrative: I WROTE WRITE-UP ZONE 240 ON JUL/MON/00 REGARDING CONTAMINATION OF EXTERIOR LOW PRESSURE OXYGEN MANIFOLDS IN 'C' ZONE. I WAS REINSTALLING PSU'S WHICH HAD BEEN REMOVED DURING THE CHK WHEN I NOTICED THE DINOL CONTAMINATION. JUL/TUE/00 A MECH WHO WAS WORKING THE CARD, ASKED ME TO CONFIRM AN AREA OF CORROSION ON THE AFT R SECTION OF THE 'C' ZONE PAX OXYGEN MANIFOLD. THERE WAS LIGHT CORROSION THERE. I HAVE EXPERIENCE WITH CORROSION ON OXYGEN MANIFOLDS. MGMNT WAS INFORMED VIA MY LEAD. MGMNT CONTACTED ENGINEERING. ENGINEERING AND MGMNT WANTED TO KNOW WHY I HAD WRITTEN A RPT FOR THE DINOL CONTAMINATION WHEN THE JOB CARD DIDN'T REQUIRE THAT TO BE CHKED OUT. I REFERRED THEM TO BOEING MAINT MANUAL REGARDING OXYGEN SYS CLEANLINESS AS WELL AS A BOEING PUB REGARDING 'DINOL CONTAMINATION OF OXYGEN LINES.' THE ENGINEER LEFT TO RESEARCH THE PROB (CORROSION). MY SHIFT WAS OVER AND MY VACATION STARTED THE NEXT DAY. I WAS BACK FROM VACATION AND ASKED ABOUT THE CORROSION. MY CREW MATES TOLD ME THEY DIDN'T BELIEVE A CARD HAD BEEN WRITTEN FOR IT. INSPECTION DEPT DOESN'T BELIEVE THERE ARE ANY REQUIRED INSPECTIONS FOR CORROSION OF OXYGEN SYS COMPONENTS. I SAW THE CORROSION, MY LEAD SAW IT, INSPECTION SAW IT, ENGINEERING SAW IT, MGMNT SAW IT. WE MECHS AND INSPECTION DON'T THINK IT'S AN IMMEDIATE SAFETY HAZARD. I WOULD GUESS LEVEL 1-2 CORROSION AT THIS TIME, BUT IT SHOULD BE ADDRESSED BEFORE TOO LONG. THE PAX OXYGEN SYS PASSED LOW PRESSURE MANIFOLD LEAK CHK AS WELL AS SYS CHK. A CARD SHOULD HAVE BEEN WRITTEN AND THE CORROSION REMOVED. THE ACFT WAS RUNNING LATE IN CHK AND THIS WAS SOMETHING THAT MGMNT PROBABLY DIDN'T WANT TO DEAL WITH.

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.