# Airworthiness Directives; Raytheon Model DH.125, HS.125, and BH.125 Series Airplanes; BAe.125 Series 800A (C-29A and U-125) and 800B Airplanes; and Hawker 800 (Including Variant U-125A) and 800XP Airplanes; Equipped with TFE731 Engines
> **Rule** · Final rule. · Published 2005-02-14 · Effective 2005-03-21 · 70 FR 7389
## Document
- **Document number:** 05-2577
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 7389
- **Publication date:** 2005-02-14
- **Effective date:** 2005-03-21
- **FAA docket:** Docket No. FAA-2004-19561
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Raytheon Model DH.125, HS.125, and BH.125 series airplanes; BAe.125 series 800A (C-29A and U-125) and 800B airplanes; and Hawker 800 (including variant U-125A) and 800XP airplanes. This AD requires installing insulating blankets on the engine compartment firewall and the wire harness passing through the firewall fairlead. This AD is prompted by a report indicating that insulation on the wire harness passing through the firewall fairlead ignited on the fuselage side of the firewall. We are issuing this AD to prevent a fire in the engine compartment from causing possible ignition of outgassing wire insulation on the fuselage side of the firewall, which could lead to an uncontrollable fire in the fuselage.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/02/14/05-2577/airworthiness-directives-raytheon-model-dh125-hs125-and-bh125-series-airplanes-bae125-series-800a)
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