# Airworthiness Directives; Honeywell International, Inc. Turbofan Engines
> **Rule** · Final rule. · Published 2012-05-31 · Effective 2012-07-05 · 77 FR 32009
## Document
- **Document number:** 2012-13082
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 77 FR 32009
- **Publication date:** 2012-05-31
- **Effective date:** 2012-07-05
- **FAA docket:** Docket No. FAA-2012-0195
## Abstract

We are adopting a new airworthiness directive (AD) for all Honeywell International, Inc. ALF502L-2C; ALF502R-3; ALF502R-3A; ALF502R-5; LF507-1F; and LF507-1H turbofan engines. This AD was prompted by two reports of engines experiencing uncontained release of low-pressure (LP) turbine blades. This AD requires operational checks of the engine overspeed trip system. We are issuing this AD to prevent LP turbine overspeed leading to uncontained release of the LP turbine blades and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/05/31/2012-13082/airworthiness-directives-honeywell-international-inc-turbofan-engines)
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