BACK TO CATEGORIES Photo ID: 1397 (Click photo to view original size.) Category: PPE Hazard: Inadequate air supply Standard Violated: 1910.134(d)(1)(ii) and 1910.134(h)(4)(i) Corrective Action: Use of NIOSH approved fittings and hoses on airline respirators, as well as using employees trained in repairing the system. Description: Photo of air hose and fittings used on an airline respirator that were not approved for use by NIOSH.