# Proposed AD FAA-2005-20969: Raytheon Model DH.125, HS.125, and BH.125 Series Airplanes; Model BAe.125 Series 800A (C-29A and U-125), 800B, 1000A, and 1000B Airplanes; and Model Hawker 800 (including variant U-125A), and 1000 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-01-04
- Products: Raytheon
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 18, 2005, 70 FR 20080
- Comments due: June 2, 2005
- Became: [AD 2006-01-04](https://openairdocs.org/ad/2006-01-04)
- Docket: FAA-2005-20969 (https://www.regulations.gov/docket/FAA-2005-20969, where comments are filed)
- Project: 2005-NM-017-AD
- FR document: 05-7673
- Official PDF: https://openairdocs.org/files/sha256/34/62/3462ab304a141c66ef0fed46e9cdc4e53cbee3c6892e02a07cef0c39c3ddb33a (from https://www.govinfo.gov/content/pkg/FR-2005-04-18/pdf/05-7673.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/04/18/05-7673/airworthiness-directives-raytheon-model-dh125-hs125-and-bh125-series-airplanes-model-bae125-series
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/67290E61FF1719A186256FE7005A7D7B.0001
- Page: https://openairdocs.org/proposed/FAA-2005-20969

## Summary

The FAA proposes to supersede an existing airworthiness directive (AD) that applies to certain Raytheon airplanes identified above. The existing AD currently requires a visual inspection to determine whether adequate clearance exists between the fan venturi motor casing and the adjacent equipment, and adjustments, if necessary; and a visual inspection to detect signs of overheating, degradation of insulating materials, and ingestion of debris into the motor, and replacement of discrepant parts with serviceable parts. This proposed AD would instead require that operators replace the fan venturi with a new or modified part. This proposed AD is prompted by reports that the fan venturi overheated and produced smoke while the airplane was on the ground. We are proposing this AD to prevent heat and fire damage to equipment adjacent to the fan venturi, which could result in smoke in the cabin and/or burning equipment.

## Notices in this docket

- Apr 18, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-7673, comments due Jun 2, 2005 (https://www.federalregister.gov/documents/2005/04/18/05-7673/airworthiness-directives-raytheon-model-dh125-hs125-and-bh125-series-airplanes-model-bae125-series)

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