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PHMSA NTSB Recommendations

The Pipeline and Hazardous Materials Safety Administration is required by law to respond to safety recommendations issued by the National Transportation Safety Board (NTSB), an independent federal agency charged by Congress with investigating transportation incidents. Recommendations usually address a specific issue uncovered during an investigation or study and specify how to correct the situation.

Open Recommendations

The NTSB classifications for open recommendations:

OAA - Open Acceptable Action
OAAR - Open Acceptable Alternate Response
OUA - Open Unacceptable Response
ORR - Open Response Received
OAR - Open Await Response
IRR - Initial Response Received


A - Air
H - Highway
P - Pipeline
R - Rail

Currently Open Recommendations

PHMSA NTSB Safety Recommendations
Recommendation Number Description Issue Date
H-04-023 Nurse Tank Inspections; OUA July 1, 2004
R-07-004 Immediate Notification to Emergency Responders; OAA April 25, 2007
A-08-001 Lithium Batteries; OAA January 7, 2008
A-08-002 Lithium Batteries; OAA January 7, 2008
H-11-005 Cargo Tank Performance Standards; OAA September 2, 2011
H-11-006 Cargo Tank Performance Standards; OAA September 2, 2011
P-11-009 PG&E Rupture - Immediate 911 Notifications; OAAR September 26, 2011
P-11-010 PG&E Rupture - Equipping SCADA Systems; OAA September 26, 2011
P-11-011 PG&E Rupture - Installing ACVs or RCVs; OAA September 26, 2011
P-12-003 Enbridge - Engineering Assessment of Cracks; OUA July 25, 2012
R-12-007 Adoption of American Association of Railroads (AAR) center sill or draft sill attachment designs; OAA March 2, 2012
R-14-014 Commodity Flow Data and Emergency Response Plan Development; OUA August 22, 2014
R-14-019 Public Education for Communities along Railroad Hazmat Routes; OAAR August 22, 2014
P-15-005 Revise National Pipeline Mapping System to include high consequence area identification; OAA February 10, 2015
P-15-011 Develop and implement risk assessment training; OAA February 10, 2015
P-15-015 Revise Form 7100.1; OAAR February 10, 2015
P-15-017 Evaluate relationship between incident occurences; OAA February 10, 2015
R-17-001 Evaluate risks posed to train review re: separation distance; OAA March 9, 2017
R-17-002 Withdraw regulatory interpretation for positioning placarded rail cars; OAA March 9, 2017
P-17-001 Work with pipeline trade and standards organizations to modify pipeline dent acceptance; OAA June 15, 2017
P-17-002 Require operators to either (a) repair all excavated dent defects or (b) install a local leak detection system; OUA June 15, 2017
H-18-003 With FMCSA, develop and implement process to ensure cargo tank inspectors able to verify safety; OUA January 30, 2018
H-18-004 With FMCSA incorporate by reference registered inspector training requirements for cargo tanks inspectors; OAA January 30, 2018
H-18-005 With FMCSA permit suspension or revocation of registration of highway cargo tank inspectors; OAA January 30, 2018
R-18-027 Sponsor research to study and publish the difference in characteristics between denatured and undenatured ethanol; OAA November 27, 2018
R-19-001 Promulgate a final standard for pressure tank cars used to transport poison inhalation hazard/toxic inhalation hazard materials; OAA February 14, 2019
R-19-002 Prohibit the use of those tank cars transporting poison inhalation hazard/toxic inhalation hazard materials that are constructed of nonnormalized steels and not constructed of steels meeting the highest available fracture toughness specifications; OAA February 14, 2019
R-19-003 Issue maintenance guidance to owners of US Department of Transportation Specification 105 pressure tank cars transporting poison inhalation hazard/toxic inhalation hazard hazardous materials with risk factors to: (1) establish structural integrity inspection frequency, (2) provide guidance for defining critical flaw size and repair and acceptance criteria for indications in fracture sensitive locations, and (3) provide guidance for selecting nondestructive testing methods to identify cracks with a sufficient probability of detection; OAA February 14, 2019
P-19-001 19Require that all new service regulators be installed outside occupied structures; OAAR June 10, 2019
P-19-002 Require existing interior service regulators be relocated outside occupied structures whenever the gas service line, meter, or regulator is replaced.  In addition, multifamily structures should be prioritized over single-family dwellings; OAAR June 10, 2019
H-19-018 Revise ERG for Hydrogen, and Guidance for Incident Management for Fuel Cell Technology; OAAR November 19, 2019
H-19-019 Require requalification inspections for tube trailer special permits; OAA November 19, 2019
H-19-020 Require inspections of cylinder PRD pressure ratings, and inspection and testing of PRD venting equipment; OAA November 19, 2019
H-19-021 Develop guidance with CGA for tube trailer PRD vent systems; OAA November 19, 2019
R-20-001 Railcar maximum coupling speeds and impact mass limits; OAR March 24, 2020
R-20-002 Structural integrity inspection of tank cars in high-energy coupling events; OAR March 24, 2020
R-20-003 Identify tank cars sustaining high energy coupling events; OAR March 24, 2020
R-20-004 Monitor tank cars to remove those damaged by high energy coupling from service; OAR March 24, 2020
A-20-031 Low production or prototype lithium-ion batteries ICAO proposal; IRR June 8, 2020
A-20-032 Remove cargo air transport exception for low-production or prototype batteries; IRR June 8, 2020
Last updated: Thursday, December 10, 2020