{"operation":"document","citation":"P-79-028","title":"NTSB Safety Recommendation P-79-028","source_type":"guidance","agency":"National Transportation Safety Board","status":"guidance","official":true,"published_on":"1979-10-04","effective_on":"1979-10-04","summary":"THE NTSB RECOMMENDS THAT THE LONE STAR GAS COMPANY: DETERMINE THROUGH SAMPLE INSPECTIONS, THE EXTENT OF THE PROBLEM OF CIRCUMFERENTIAL CRACKING ON ITS SERVICE LINE/GAS MAIN CONNECTIONS SIMILAR TO THAT AT THE ACCIDENT LOCATIONS. TAKE APPROPRIATE ACTION TO REDUCE THE PROBABILITY OF THE RECURRENCE OF SIMILAR ACCIDENTS. (URGENT)","machine_formats":{"json":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-79-028.json","markdown":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-79-028.md"},"app_url":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-79-028","source_url":"https://data.ntsb.gov/carol-main-public/sr-details/P-79-028","body":"NTSB safety recommendation P-79-028.\n\nTHE NTSB RECOMMENDS THAT THE LONE STAR GAS COMPANY: DETERMINE THROUGH SAMPLE INSPECTIONS, THE EXTENT OF THE PROBLEM OF CIRCUMFERENTIAL CRACKING ON ITS SERVICE LINE/GAS MAIN CONNECTIONS SIMILAR TO THAT AT THE ACCIDENT LOCATIONS. TAKE APPROPRIATE ACTION TO REDUCE THE PROBABILITY OF THE RECURRENCE OF SIMILAR ACCIDENTS. (URGENT)\n\nPriority: CLASS I\n\nOverall Status: Closed - Acceptable Action\n\nIssued Date: 1979-10-04\n\nAdopted Date: 1979-10-04\n\nOverall Date Closed: 1980-05-05\n\nSynopsis: ON JANUARY 19, 1979, IN NORTH RICHLAND HILLS, TEXAS AN ACCUMULATION OF NATURAL GAS IN A HOUSE WAS IGNITED BY AN UNKNOWN SOURCE. THE RESULTING EXPLOSION AND FIRE DESTROYED THE HOUSE. ONE RESIDENT WAS KILLED AND ANOTHER WAS CRITICALLY INJURED.\n\nNtsbnumber: FTW79FP004\n\nReport Number: PAR-72-3\n\nAddressee Name: Lone Star Gas Company\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1980-05-05\n\nAddressee Organization Type: P-Private Industry\n\nCommunication Date: 1980-03-05\n\nCommunication Type: Official Correspondence\n\nCommunication Contents: LONE STAR GAS COMPANY LTR: THREE HUNDRED AND TWENTY-EIGHT (328) RANDOM SAMPLE INSPECTIONS OF SWING-JOINT AND MAIN CONNECTIONS WERE MADE IN ARLINGTON AND NORTH RICHLAND HILLS. NO IMMEDIATE DANGER WITH THESE CONNECTIONS WAS FOUND. THERE WERE NO INDICATIONS OF CIRCUMFERENTIAL STRESS CRACKING PROBLEMS AT THE CONNECTIONS OR ON THE THREADS. NO SWING-JOINT OR MAIN CONNECTION WAS FOUND TO BE IN EXCESSIVE STRAIN WHICH WOULD CAUSE CIRCUMFERENTIAL CRACKING AT ANY OF THE THREADED CONNECTIONS. LONE STAR ALSO REVIEWED LEAK REPAIR ORDERS INVOLVING SERVICE LINE REPLACEMENTS, SWING-JOINT, AND SERVICE TAP CONNECTIONS FOR INSTANCES OF MATERIAL FAILURE DUE TO SOIL MOVEMENT AND STRESS CRACKING AT THREADED CONNECTIONS. THE REVIEW REVEALED NO INSTANCES OF CIRCUMFERENTIAL CRACKING AT SERVICE LINE/GAS MAIN CONNECTIONS. LONE STAR WILL TAKE NO FURTHER ACTION.\n\nAddressee Organization Type: P-Private Industry\n\nCommunication Date: 1980-05-05\n\nCommunication Type: Official Correspondence","truncated":false,"body_characters":2057}