# Airworthiness Directives; Raytheon Model Beech 400, 400A, and 400T Series Airplanes, Model Mitsubishi MU-300 Airplanes, and Model Beech MU-300-10 Airplanes
> **Rule** · Final rule; request for comments. · Published 2001-12-06 · Effective 2001-12-11 · 66 FR 63307
## Document
- **Document number:** 01-30083
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 66 FR 63307
- **Publication date:** 2001-12-06
- **Effective date:** 2001-12-11
- **FAA docket:** Docket No. 2001-NM-347-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to all Raytheon Model Beech 400, 400A, and 400T series airplanes, Model Mitsubishi MU-300 airplanes, and Model Beech MU-300-10 airplanes. This action requires revising the Emergency Procedures Section of the Airplane Flight Manual to ensure the flightcrew is advised of in-flight procedures in the event of loss of airspeed indication. Such loss of airspeed indication and the resulting adverse effects on certain connecting systems could result in reduced controllability of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/12/06/01-30083/airworthiness-directives-raytheon-model-beech-400-400a-and-400t-series-airplanes-model-mitsubishi)
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