AI Article Synopsis
- Asbestos fire sleeves have been used for protecting aircraft fluid hoses, raising concerns about airborne fiber exposure for mechanics.
- The investigation involved testing air quality in a small enclosed workroom during hose assembly fabrication, revealing low levels of airborne asbestos fibers.
- Results showed that the asbestos exposure from working with these materials was below regulatory limits, indicating it does not pose a significant risk to those handling them.
Article Abstract
Asbestos-containing fire sleeves have been used as a fire protection measure for aircraft fluid hoses. This investigation was conducted to determine the level of airborne asbestos fiber exposure experienced by mechanics who work with fire sleeve protected hoses. Duplicate testing was performed inside a small, enclosed workroom during the fabrication of hose assemblies. Personal air samples taken during this work showed detectable, but low airborne asbestos fiber exposures. Analysis of personal samples (n=9) using phrase contract microscopy (PCM) indicated task duration airborne fiber concentrations ranging from 0.017 to 0.063 fibers per milliliter (f/ml) for sampling durations of 167-198 min, and 0.022-0.14 f/ml for 30 min samples. Airborne chrysotile fibers were detected for four of these nine personal samples, and the resulting asbestos adjusted airborne fiber concentrations ranged from 0.014 to 0.025 f/ml. These results indicate that work with asbestos fire sleeve and fire sleeve protected hose assemblies, does not produce regulatory noncompliant levels of asbestos exposure for persons who handle, cut and fit these asbestos-containing materials.
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| http://dx.doi.org/10.1016/j.yrtph.2011.08.003 | DOI Listing |
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