# Proposed AD FAA-2011-1069: Learjet Inc. Model 45 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-08-08
- Products: Learjet
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 19, 2011, 76 FR 64851
- Comments due: December 5, 2011
- Became: [AD 2012-08-08](https://openairdocs.org/ad/2012-08-08)
- Docket: FAA-2011-1069 (https://www.regulations.gov/docket/FAA-2011-1069, where comments are filed)
- Project: 2011-NM-025-AD
- FR document: 2011-27010
- Official PDF: https://openairdocs.org/files/sha256/7e/3e/7e3eeb6e7132ebd0ec4b94443d6bc771c891dd3511012a10f586870baf636ffb (from https://www.govinfo.gov/content/pkg/FR-2011-10-19/pdf/2011-27010.pdf)
- Federal Register: https://www.federalregister.gov/documents/2011/10/19/2011-27010/airworthiness-directives-learjet-inc-model-45-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6EE50F84D9E4B4278625792E0059C962.0001
- Page: https://openairdocs.org/proposed/FAA-2011-1069

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD would require revising the maintenance program to include new or more restrictive life-limits and inspections. This proposed AD was prompted by changes to the Airworthiness Limitations Section (ALS) of the maintenance manual, which adds life-limits, revises life-limits, or adds inspections not previously identified. We are proposing this AD to limit exposure of flight critical components to corrosion, cracking, or failure due to life-limits, which if not corrected, could result in loss of roll control, fatigue cracking, or loss of structural components.

## Notices in this docket

- Oct 19, 2011: Notice of proposed rulemaking (NPRM). (first notice), FR document 2011-27010, comments due Dec 5, 2011 (https://www.federalregister.gov/documents/2011/10/19/2011-27010/airworthiness-directives-learjet-inc-model-45-airplanes)

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