Narrative:

Picked up an aircraft when the mechanics were waiting to do an oil and filter change on #2 (right) engine. Basically nothing was in the aircraft log book (E-6). First officer and I were looking at a computer run of the maintenance history and saw that 'something' was wrong with the lubricant in the right (#2) engine. Maintenance changed the oil and filter, did and engine run for leak check and then flew on to ord. Upon arrival at ord, we determined that hydraulic fluid was introduced to the engine inadvertently several days earlier and that a standard oil analysis program sample taken had showed this mistake. We were not given the full history on this aircraft. I feel that we flew an aircraft that should have had a lot more checking done to the #2 engine to make sure that no damage was done internally since skydrol is so corrosive to some materials. By default we proved that all was ok, at least for the time being, since the engine did ok for 2 1/2 hours or so up to ord from dfw. I did not like taking the aircraft this way out of dfw. Even less so upon arrival at ord and having it confirmed that over a qt of hydraulic fluid was in fact in the engine for several days, and that the standard oil analysis program sample set to the lab 'pegged out' the meter for contaminants.

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Original NASA ASRS Text

Title: FO QUESTIONS THE AIRWORTHINESS OF AN ACR MLG ACFT AFTER FLT IS COMPLETED.

Narrative: PICKED UP AN ACFT WHEN THE MECHS WERE WAITING TO DO AN OIL AND FILTER CHANGE ON #2 (RIGHT) ENG. BASICALLY NOTHING WAS IN THE ACFT LOG BOOK (E-6). F/O AND I WERE LOOKING AT A COMPUTER RUN OF THE MAINT HISTORY AND SAW THAT 'SOMETHING' WAS WRONG WITH THE LUBRICANT IN THE RIGHT (#2) ENG. MAINT CHANGED THE OIL AND FILTER, DID AND ENG RUN FOR LEAK CHK AND THEN FLEW ON TO ORD. UPON ARR AT ORD, WE DETERMINED THAT HYD FLUID WAS INTRODUCED TO THE ENG INADVERTENTLY SEVERAL DAYS EARLIER AND THAT A STANDARD OIL ANALYSIS PROGRAM SAMPLE TAKEN HAD SHOWED THIS MISTAKE. WE WERE NOT GIVEN THE FULL HISTORY ON THIS ACFT. I FEEL THAT WE FLEW AN ACFT THAT SHOULD HAVE HAD A LOT MORE CHKING DONE TO THE #2 ENG TO MAKE SURE THAT NO DAMAGE WAS DONE INTERNALLY SINCE SKYDROL IS SO CORROSIVE TO SOME MATERIALS. BY DEFAULT WE PROVED THAT ALL WAS OK, AT LEAST FOR THE TIME BEING, SINCE THE ENG DID OK FOR 2 1/2 HRS OR SO UP TO ORD FROM DFW. I DID NOT LIKE TAKING THE ACFT THIS WAY OUT OF DFW. EVEN LESS SO UPON ARR AT ORD AND HAVING IT CONFIRMED THAT OVER A QT OF HYD FLUID WAS IN FACT IN THE ENG FOR SEVERAL DAYS, AND THAT THE STANDARD OIL ANALYSIS PROGRAM SAMPLE SET TO THE LAB 'PEGGED OUT' THE METER FOR CONTAMINANTS.

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.