# Proposed AD FAA-2012-0930: Bombardier, Inc. Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-11-12
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 6, 2012, 77 FR 54846
- Comments due: October 22, 2012
- Became: [AD 2013-11-12](https://openairdocs.org/ad/2013-11-12)
- Docket: FAA-2012-0930 (https://www.regulations.gov/docket/FAA-2012-0930, where comments are filed)
- Project: 2011-NM-251-AD
- FR document: 2012-21946
- Official PDF: https://openairdocs.org/files/sha256/c8/ec/c8eccf8eecd0b41fc1e193dedb4280b2cffcef616a2dc46ce83a0380128462e6 (from https://www.govinfo.gov/content/pkg/FR-2012-09-06/pdf/2012-21946.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/09/06/2012-21946/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C32AC6B78EA5C29886257A71005443A1.0001
- Page: https://openairdocs.org/proposed/FAA-2012-0930

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc. Model BD-100-1A10 (Challenger 300) airplanes. This proposed AD was prompted by reports of failure of a screw cap or end cap of the auxiliary hydraulic system accumulator while on the ground, which resulted in loss of use of that hydraulic system and high-energy impact damage to adjacent systems and structures. This proposed AD would require inspecting for the correct serial number of a certain hydraulic system accumulator, and replacing affected hydraulic system accumulators with new or serviceable accumulators. We are proposing this AD to prevent failure of a screw cap or end cap and loss of the related hydraulic system, which could result in damage to airplane structure and consequent reduced controllability of the airplane.

## Notices in this docket

- Sep 6, 2012: Notice of proposed rulemaking (NPRM). (first notice), FR document 2012-21946, comments due Oct 22, 2012 (https://www.federalregister.gov/documents/2012/09/06/2012-21946/airworthiness-directives-bombardier-inc-airplanes)

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