# Proposed AD FAA-2010-0434: BAE Systems (Operations) Limited Model BAe 146-100A and -200A Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-16-09
- Products: BAE Systems
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 30, 2010, 75 FR 22710
- Comments due: June 14, 2010
- Became: [AD 2010-16-09](https://openairdocs.org/ad/2010-16-09)
- Docket: FAA-2010-0434 (https://www.regulations.gov/docket/FAA-2010-0434, where comments are filed)
- Project: 2009-NM-221-AD
- FR document: 2010-10111
- Official PDF: https://openairdocs.org/files/sha256/d4/68/d468f37e7c9bc83d2d55d479a6e3aed940ab3a57ba97eb09dc75b45f84b7ee3c (from https://www.govinfo.gov/content/pkg/FR-2010-04-30/pdf/2010-10111.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/04/30/2010-10111/airworthiness-directives-bae-systems-operations-limited-model-bae-146-100a-and--200a-series
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CA8E211A5622B30A8625771500592E05.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0434

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

The operation of the airbrake lever in the "airbrakes out'' to "lift spoiler'' range has been the subject of two occurrence reports. The lift spoilers on the BAe 146 and Avro 146-RJ aeroplanes have been designed to deploy on landing to provide aerodynamic braking and to dump lift to ensure that the wheel brakes can provide the necessary speed reduction. * * * * *

The effects of deceleration and landing inertia loads can cause uncommanded movement of the airbrake selector lever from the "lift spoiler'' position to the "airbrakes out'' position, causing the lift spoilers to retract during the landing roll. This condition, if not corrected, would increase the landing distance, possibly resulting in a runway overrun and consequent injury to aeroplane occupants. * * * * *

The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Apr 30, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-10111, comments due Jun 14, 2010 (https://www.federalregister.gov/documents/2010/04/30/2010-10111/airworthiness-directives-bae-systems-operations-limited-model-bae-146-100a-and--200a-series)

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