# Airworthiness Directives; Hartzell Propeller Inc. Model HC-B3TN-5( ) Propellers
> **Rule** · Final rule. · Published 2003-02-28 · Effective 2003-04-04 · 68 FR 9508
## Document
- **Document number:** 03-4484
- **Category:** airworthiness
- **Manufacturer:** Hartzell
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 68 FR 9508
- **Publication date:** 2003-02-28
- **Effective date:** 2003-04-04
- **FAA docket:** Docket No. 2001-NE-44-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), that is applicable to Hartzell Propeller Inc. model HC-B3TN-5( ) propellers, with blades part number (P/N) T10176H(B,K)-5 or T10178H(B)-11(R) that are installed on Mitsubishi Heavy Industries, Ltd, MU-2 series airplanes. This amendment requires replacement of those blades with blades of the latest design. This amendment is prompted by a report of in-flight propeller blade separation that caused a severe out-of- balance condition, damage to the airplane, and resulted in engine shutdown and a safe landing. The actions specified by this AD are intended to prevent propeller blade separation, damage to the airplane, and possible loss of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2003/02/28/03-4484/airworthiness-directives-hartzell-propeller-inc-model-hc-b3tn-5--propellers)
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