# Proposed AD FAA-2010-0056: British Aerospace Regional Aircraft Model HP.137 Jetstream Mk.1, Jetstream Series 200, Jetstream Series 3101, and Jetstream Model 3201 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-08-04
- Products: British Aerospace
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 21, 2010, 75 FR 3418
- Comments due: March 8, 2010
- Became: [AD 2010-08-04](https://openairdocs.org/ad/2010-08-04)
- Docket: FAA-2010-0056 (https://www.regulations.gov/docket/FAA-2010-0056, where comments are filed)
- Project: 2009-CE-051-AD
- FR document: 2010-1086
- Official PDF: https://openairdocs.org/files/sha256/cd/3b/cd3b92aa966fa7f12ce0d129e474ed3467f13c3675621b24230b6cd5790e0752 (from https://www.govinfo.gov/content/pkg/FR-2010-01-21/pdf/2010-1086.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/01/21/2010-1086/airworthiness-directives-british-aerospace-regional-aircraft-model-hp137-jetstream-mk1-jetstream
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CB476B4960546156862576B2005831D7.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0056

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above that would supersede an existing AD. 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: Cracks have been found in the NLG steering jack piston rod adjacent to the eye-end. This was caused by excessive torque which had been applied to the eye-end during assembly of the unit. Severe cracking, if not detected and corrected, can cause the jack to fail during operation, which may lead to loss of directional control of the aeroplane during critical phases of take-off and landing. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Jan 21, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-1086, comments due Mar 8, 2010 (https://www.federalregister.gov/documents/2010/01/21/2010-1086/airworthiness-directives-british-aerospace-regional-aircraft-model-hp137-jetstream-mk1-jetstream)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.