# NTSB Safety Recommendation P-76-019 - **operation:** document - **citation:** P-76-019 - **title:** NTSB Safety Recommendation P-76-019 - **source type:** guidance - **agency:** National Transportation Safety Board - **status:** guidance - **official:** true - **published on:** 1976-02-08 - **effective on:** 1976-02-08 - **summary:** TRAIN EMPLOYEES WHO WILL INSTALL COMPRESSION COUPLINGS UNDER THE STANDARDS DEVELOPED AND MONITOR THEIR PERFORMANCE BY INSPECTING THEIR WORK. (URGENT) - **machine formats:** - **json:** https://regulus.evalyn.ai/document/ntsb-recommendation-p-76-019.json - **markdown:** https://regulus.evalyn.ai/document/ntsb-recommendation-p-76-019.md - **app url:** https://regulus.evalyn.ai/document/ntsb-recommendation-p-76-019 - **source url:** https://data.ntsb.gov/carol-main-public/sr-details/P-76-019 **body:** NTSB safety recommendation P-76-019. TRAIN EMPLOYEES WHO WILL INSTALL COMPRESSION COUPLINGS UNDER THE STANDARDS DEVELOPED AND MONITOR THEIR PERFORMANCE BY INSPECTING THEIR WORK. (URGENT) Priority: CLASS I Overall Status: Closed--No Longer Applicable Issued Date: 1976-02-08 Adopted Date: 1976-04-29 Overall Date Closed: 1983-01-27 Synopsis: ON FEBRUARY 8, 1976, A HOUSE IN PHOENIX, ARIZONA, EXPLODED AND BURNED. OF TWO PERSONS WHO WERE HOSPITALIZED AS A RESULT OF THE ACCIDENT, ONE DIED. Probable Cause: The National Transportation Safety Board's investigation of this accident disclosed that the natural gas at 39-psig pressure had leaked from the compression coupled connection of a 2-inch pipe appeared to have been inserted insufficiently through the gasket and into the coupling. Gas which leaked from this joint was trapped from above by heavily compacted soil; it consequently seeped into the house, where it was ignited by an unknown source. The 2-inch plastic pipe, which was installed in 1968 by the Arizona Public Service Company, was damaged by an excavator in 1969. The gas company repaired the leak by installing a 6-inch-ling compression coupling to connect each end of the severed 2-inch plastic pipe. The repaired section was wrapped with tape which extended 3 to 4 inches over the pipe on each side of the coupling. Ntsbnumber: DCA76FP015 Report Number: None Addressee Name: Arizona Public Service Company Addressee Status: Closed--No Longer Applicable Addressee Date Closed: 1983-01-27 Addressee Acronym: APS Addressee Organization Type: P-Private Industry Communication Date: 1982-11-12 Communication Type: Official Correspondence Communication Contents: ARIZONA PUBLIC SERVICE COMPANY LTR: ALL EXISTING LOCATIONS OF THE SUBJECT COUPLINGS ARE PERIODICALLY LEAK SURVEYED PURSUANT TO THE GUIDELINES ESTABLISHED BY THE NTSB. Addressee Acronym: APS Addressee Organization Type: P-Private Industry Communication Date: 1982-10-05 Communication Type: Official Correspondence Addressee Acronym: APS Addressee Organization Type: P-Private Industry Communication Date: 1983-01-27 Communication Type: Official Correspondence - **truncated:** false - **body characters:** 2159