In 2011-2012, Mine Safety Appliances (MSA) P-100 cartridges were occasionally dislodged from MSA OptimAir TL Powered Air Purifying Respirator (PAPR) units. The contractor devised a "bumper guard" to minimize dislodging impacts. MSA evaluated the installation of the bumper guard over the top of the installed P-100 cartridge. In October 2016, it was discovered that the bumper guard prevented an adequate seal between the MSA OptimAir TL blower housing and the o-ring inside the MSA Chemical-Organic Vapor (Chem-OV) filter cartridges, reducing the effectiveness of the respiratory protection.
Lesson Learned: Evaluate respiratory protection process and component changes to maintain conformance with NIOSH approvals and manufacturer evaluations. Actively monitor implementation practices in the field.
You are accessing a U.S. Government information system.
Unauthorized or improper use or access of this system may result in disciplinary action, as well as civil and criminal penalties.
By using this information system, you understand and consent to the following:
You have no reasonable expectation of privacy when you use this information system; this includes any communications or data transiting,
stored on or traveling to or from this information system. At any time, and for any lawful government purpose, the government may monitor,
intercept, search and seize any communication or data transiting, stored on or traveling to or from this information system.
The government may disclose or use any communications or data transiting, stored on or traveling to or from this information system for any lawful government purpose.
Classified or Official Use Only information is not allowed on this website.
Need help? Contact the System Administrator 509-376-4821 or
email@example.com. Their hours of operation are 6 AM to 4 PM PT Monday through Thursday.