# Airworthiness Directives; The Cessna Aircraft Company Airplanes
> **Rule** · Final rule. · Published 2012-09-19 · Effective 2012-10-24 · 77 FR 57994
## Document
- **Document number:** 2012-22337
- **Category:** airworthiness
- **Manufacturer:** The Cessna
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 77 FR 57994
- **Publication date:** 2012-09-19
- **Effective date:** 2012-10-24
- **FAA docket:** Docket No. FAA-2012-0644
## Abstract

We are adopting a new airworthiness directive (AD) for certain The Cessna Aircraft Company Model 750 airplanes. This AD was prompted by reports of direct current (DC) generator overvoltage events. This AD requires replacing the auxiliary power unit (APU) generator control unit (GCU). We are issuing this AD to prevent DC generator overvoltage events, which could result in smoke in the cockpit and loss of avionics and electrical systems.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/09/19/2012-22337/airworthiness-directives-the-cessna-aircraft-company-airplanes)
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