# Proposed AD FAA-2012-1072: Bombardier, Inc. Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-09-07
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 16, 2012, 77 FR 63281
- Comments due: November 30, 2012
- Became: [AD 2013-09-07](https://openairdocs.org/ad/2013-09-07)
- Docket: FAA-2012-1072 (https://www.regulations.gov/docket/FAA-2012-1072, where comments are filed)
- Project: 2012-NM-141-AD
- FR document: 2012-25453
- Official PDF: https://openairdocs.org/files/sha256/ae/c7/aec73fad353e7161d349c717896eb42bee71550931f8bda7582a6012f62f6720 (from https://www.govinfo.gov/content/pkg/FR-2012-10-16/pdf/2012-25453.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/10/16/2012-25453/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/01109DD42A295AC886257A9900564040.0001
- Page: https://openairdocs.org/proposed/FAA-2012-1072

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. This proposed AD was prompted by reports of two in- service incidents where the left main landing gear (MLG) failed to extend. This proposed AD would require installing stopper plates on the aft uplock frames in the MLG bay adjacent to the right and left MLG uplock assemblies. We are proposing this AD to prevent incorrect installation of the upper bolt in the MLG uplock assembly, which could prevent the MLG from extending and adversely affect the safe landing of the airplane.

## Notices in this docket

- Oct 16, 2012: Notice of proposed rulemaking (NPRM). (first notice), FR document 2012-25453, comments due Nov 30, 2012 (https://www.federalregister.gov/documents/2012/10/16/2012-25453/airworthiness-directives-bombardier-inc-airplanes)

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