STP1393

    Analysis of Two Jet Engine Lubricating Oils and a Hydraulic Fluid: Their Pyrolytic Breakdown Products and Their Implication on Aircraft Air Quality

    Published: Jan 2000


      Format Pages Price  
    PDF Version (232K) 15 $25   ADD TO CART
    Complete Source PDF (5.7M) 15 $55   ADD TO CART


    Abstract

    Aircraft air quality incidents are often traced to jet engine oil and/or hydraulic fluid leaking into bleed air used to ventilate the cabin. These contaminants can be subjected to temperatures in excess of 500°C. Exposed flight crew members have reported symptoms including dizziness, nausea, disorientation, blurred vision, and tingling in legs and arms.

    Pyrolysis experiments of two jet engine oils and one hydraulic fluid at 525°C showed the engine oils to be important sources of carbon monoxide (CO). The same 5 out of the 10 possible tri-cresyl phosphate (TCP) isomers that were found in the bulk oils were found in the atmosphere at ambient temperatures after pyrolysis and were likely associated with smoke particles, illustrating an important potential route of exposure. Tri-orthocresyl phosphate (TOCP) was not found in the oils or fluid tested. The neurotoxin trimethyl propane phosphate (TMPP) was not found.

    It was suggested that different symptoms could be expected depending on which fluid was pyrolized.

    Keywords:

    aircraft, air quality, hydraulic fluid, engine oil, tri-cresylphosphates, tributyl phosphate, pyrolysis


    Author Information:

    van Netten, C
    Associate Professor, University of British Columbia, Vancouver, B. C.


    Paper ID: STP14488S

    Committee/Subcommittee: D22.05

    DOI: 10.1520/STP14488S


    CrossRef ASTM International is a member of CrossRef.