# NTSB Safety Recommendation P-74-010

**Citation:** P-74-010  
**Type / status:** guidance / guidance  
**Agency:** National Transportation Safety Board  
**Effective:** 1974-02-20  
**Published:** 1974-02-20

THE NTSB RECOMMENDS THAT THE OFFICE OF PIPELINE SAFETY OF THE DEPARTMENT OF TRANSPORTATION: AMEND 49 CFR 192 TO REQUIRE THAT CAST-IRON PIPING OR FITTINGS UNCOVERED DURING CONSTRUCTION OR MAINTENANCE WORK IN SUCH A WAY AS TO WEAKEN THEIR SUPPORT FROM BELOW BE REPLACED OR REINFORCED TO PROTECT AGAINST OUTSIDE FORCES WHICH COULD CAUSE FAILURE.

## Document text

NTSB safety recommendation P-74-010.

THE NTSB RECOMMENDS THAT THE OFFICE OF PIPELINE SAFETY OF THE DEPARTMENT OF TRANSPORTATION: AMEND 49 CFR 192 TO REQUIRE THAT CAST-IRON PIPING OR FITTINGS UNCOVERED DURING CONSTRUCTION OR MAINTENANCE WORK IN SUCH A WAY AS TO WEAKEN THEIR SUPPORT FROM BELOW BE REPLACED OR REINFORCED TO PROTECT AGAINST OUTSIDE FORCES WHICH COULD CAUSE FAILURE.

Priority: CLASS II

Overall Status: Closed - Acceptable Action

Issued Date: 1974-02-20

Adopted Date: 1974-02-13

Overall Date Closed: 1978-09-28

Synopsis: ON APRIL 22, 1973, A VIOLENT EXPLOSION DESTROYED 7 OF 15 UNITS IN AN APARTMENT COMPLEX IN EL PASO, TEXAS. SEVEN PERSONS WERE KILLED, AND EIGHT PERSONS WERE HOSPITALIZED, TWO OF WHOM WERE CRITICALLY INJURED.

Ntsbnumber: PLD73XR007

Report Number: PAR-74-02

Addressee Name: RSPA

Addressee Status: Closed - Acceptable Action

Addressee Date Closed: 1978-09-28

## Provenance

- Official: Yes
- Source: <https://data.ntsb.gov/carol-main-public/sr-details/P-74-010>
- Source ID: `ntsb-pipeline`
- SHA-256: `0427eb375a7fe4eabdcca8a9bdf8ce3ce2846458d7c2e5bf8c704c1f4ba0928a`
- Retrieved: 2026-08-20T04:57:24.741Z
- Exported: 2026-08-25T15:58:06.738Z
- Document slug: `ntsb-recommendation-p-74-010`

### Source metadata

```json
{
  "recordKind": "ntsb_safety_recommendation",
  "safetyRecommendationNumber": "P-74-010",
  "recommendationMode": "Pipeline",
  "topicMode": "Pipeline",
  "ntsbNumber": "PLD73XR007",
  "priority": "CLASS II",
  "overallStatus": "Closed - Acceptable Action",
  "overallStatusAcronym": "CAA",
  "overallDateClosed": "1978-09-28",
  "lastModifiedDate": "2016-11-15",
  "reportNumber": "PAR-74-02",
  "reportUrl": "https://www.ntsb.gov/investigations/Pages/PLD73XR007.aspx",
  "transmittalLetterUrl": "http://www.ntsb.gov/safety/safety-recs/recletters/P74_10_15.pdf",
  "addressees": [
    {
      "addresseeName": "RSPA",
      "addresseeStatusAcronym": "CAA",
      "addresseeStatus": "Closed - Acceptable Action",
      "addresseeDateClosed": "1978-09-28",
      "addresseeDetails": []
    }
  ],
  "jurisdiction": "US"
}
```