# NTSB Safety Recommendation P-77-005

- **operation:** document
- **citation:** P-77-005
- **title:** NTSB Safety Recommendation P-77-005
- **source type:** guidance
- **agency:** National Transportation Safety Board
- **status:** guidance
- **official:** true
- **published on:** 1977-06-08
- **effective on:** 1977-06-08
- **summary:** DEVELOP GUIDELINES TO ASSIST OPERATORS DURING EMERGENCIES TO PROMPTLY ISOLATE LEAKING SEGMENTS OF PIPE IN A LOW-PRESSURE SYSTEM.
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- **app url:** https://regulus.evalyn.ai/document/ntsb-recommendation-p-77-005
- **source url:** https://data.ntsb.gov/carol-main-public/sr-details/P-77-005
**body:**

NTSB safety recommendation P-77-005.

DEVELOP GUIDELINES TO ASSIST OPERATORS DURING EMERGENCIES TO PROMPTLY ISOLATE LEAKING SEGMENTS OF PIPE IN A LOW-PRESSURE SYSTEM.

Priority: CLASS III

Overall Status: Closed - Acceptable Action

Issued Date: 1977-06-08

Adopted Date: 1977-05-18

Overall Date Closed: 1985-07-29

Synopsis: ON AUGUST 8, 1976, A GAS EXPLOSION DESTROYED A HOUSE AT 1127 OAK STREET, ALLENTOWN, PENNSYLVANIA. THE GAS MIGRATED FROM A BREAK IN A 4-INCH CAST-IRON MAIN UNDER THE STREET, THROUGH LOOSE SOIL UNDER A CONCRETE SIDEWALK, AND INTO THE BUILDING THROUGH CRACKS AND OPENINGS IN ITS FOUNDATION.

Ntsbnumber: DCA76MP024

Report Number: PAR-77-02

Addressee Name: American Society of Mechanical Engineers

Addressee Status: Closed - Acceptable Action

Addressee Date Closed: 1985-07-29

Addressee Acronym: ASME

Addressee Organization Type: A-Associations

Communication Date: 1978-09-06

Communication Type: Official Correspondence

Communication Contents: ASME LTR: ASME-GPSC IS REVIEWING THIS RECOMMENDATION.

Addressee Acronym: ASME

Addressee Organization Type: A-Associations

Communication Date: 1985-07-29

Communication Type: Official Correspondence

Addressee Acronym: ASME

Addressee Organization Type: A-Associations

Communication Date: 1978-05-01

Communication Type: Official Correspondence
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