# Modification of Class B Airspace; Philadelphia, PA
> **Rule** · Final rule. · Published 2013-05-09 · Effective 2013-07-25 · 78 FR 27025
## Document
- **Document number:** 2013-10811
- **Category:** airspace
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 78 FR 27025
- **Publication date:** 2013-05-09
- **Effective date:** 2013-07-25
- **FAA docket:** Docket No. FAA-2012-0662
## Abstract

This action modifies the Philadelphia, PA, Class B airspace area to ensure the containment of large turbine-powered aircraft within Class B airspace, reduce controller workload, and reduce the potential for midair collision in the Philadelphia terminal area.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/05/09/2013-10811/modification-of-class-b-airspace-philadelphia-pa)
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