Safety Recommendation Report: Installation of PermaLock Mechanical Tapping Tee Assemblies

​The National Transportation Safety Board (NTSB) is providing the following information to urge the Pipeline and Hazardous Materials Safety Administration (PHMSA) and Honeywell to take action on safety recommendations intended to prevent the incorrect installation of PermaLock mechanical tapping tee assemblies in gas distribution systems. These recommendations are derived from the ongoing investigation of a fatal accident involving a natural gas explosion and fire in Millersville, Pennsylvania. The NTSB is issuing two recommendations to PHMSA and two recommendations to Honeywell. ​This Safety Recommendation Report is not a final report and as such contains no determination of probable cause.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References;
  • Pagination: 10p

Subject/Index Terms

Filing Info

  • Accession Number: 01675091
  • Record Type: Publication
  • Report/Paper Numbers: PSR-18/01, Accident ID: DCA17FP006
  • Files: TRIS
  • Created Date: Jun 28 2018 10:01AM