# NTSB Safety Recommendation P-77-002

**Citation:** P-77-002  
**Type / status:** guidance / guidance  
**Agency:** National Transportation Safety Board  
**Effective:** 1977-06-08  
**Published:** 1977-06-08

REVISE ITS EMERGENCY PLANS TO INCORPORATE THE REVISIONS THAT BECAME EFFECTIVE OCTOBER 1, 1976, TO 49 CODE OF FEDERAL REGULATIONS 192.615, AND TO INSURE EMERGENCY RESPONSE COORDINATION WITH FIRE AND OTHER PUBLIC OFFICIALS. PARTICULAR EMPHASIS SHOULD BE PLACED ON THE AVAILABILITY AND THE PROPER USE OF COMBUSTIBLE GAS INDICATORS.

## Document text

NTSB safety recommendation P-77-002.

REVISE ITS EMERGENCY PLANS TO INCORPORATE THE REVISIONS THAT BECAME EFFECTIVE OCTOBER 1, 1976, TO 49 CODE OF FEDERAL REGULATIONS 192.615, AND TO INSURE EMERGENCY RESPONSE COORDINATION WITH FIRE AND OTHER PUBLIC OFFICIALS. PARTICULAR EMPHASIS SHOULD BE PLACED ON THE AVAILABILITY AND THE PROPER USE OF COMBUSTIBLE GAS INDICATORS.

Priority: CLASS III

Overall Status: Closed - Acceptable Action

Issued Date: 1977-06-08

Adopted Date: 1977-05-18

Overall Date Closed: 1985-07-10

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: UGI Corporation

Addressee Status: Closed - Acceptable Action

Addressee Date Closed: 1985-07-10

Addressee Organization Type: P-Private Industry

Communication Date: 1985-07-10

Communication Type: Official Correspondence

## Provenance

- Official: Yes
- Source: <https://data.ntsb.gov/carol-main-public/sr-details/P-77-002>
- Source ID: `ntsb-pipeline`
- SHA-256: `96832406e873b48f6e5430305d4539e6e258dbc0dd8fe660fcf0965d55d9b37a`
- Retrieved: 2026-08-20T04:57:24.741Z
- Exported: 2026-08-22T05:31:01.288Z
- Document slug: `ntsb-recommendation-p-77-002`

### Source metadata

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  "safetyRecommendationNumber": "P-77-002",
  "recommendationMode": "Pipeline",
  "topicMode": "Pipeline",
  "ntsbNumber": "DCA76MP024",
  "priority": "CLASS III",
  "overallStatus": "Closed - Acceptable Action",
  "overallStatusAcronym": "CAA",
  "overallDateClosed": "1985-07-10",
  "lastModifiedDate": "2016-11-15",
  "reportNumber": "PAR-77-02",
  "reportUrl": "https://www.ntsb.gov/investigations/Pages/DCA76MP024.aspx",
  "transmittalLetterUrl": "http://www.ntsb.gov/safety/safety-recs/recletters/P77_1_3.pdf",
  "addressees": [
    {
      "addresseeName": "UGI Corporation",
      "addresseeStatusAcronym": "CAA",
      "addresseeStatus": "Closed - Acceptable Action",
      "addresseeDateClosed": "1985-07-10",
      "addresseeDetails": [
        {
          "addresseeAcronym": null,
          "addresseeOrganizationType": "P-Private Industry",
          "isFromNtsb": true,
          "communicationDate": "1985-07-10",
          "communicationType": "Official Correspondence",
          "communicationContents": ""
        }
      ]
    }
  ],
  "jurisdiction": "US"
}
```