Summary
We are adopting a new airworthiness directive (AD) for all Bombardier, Inc. Model BD-100-1A10 (Challenger 300) airplanes. This AD was prompted by reports that the horizontal stabilizer trim actuator (HSTA) no-back and the number 1 motor brake assembly (MBA) can both fail dormant. This AD requires revising the airplane maintenance schedule to include new functional tests of the HSTA no-back and HSTA brake system. We are issuing this AD to prevent dormant failure of the HSTA no-back and the number 1 MBA, which along with additional component failure could result in an uncontrollable horizontal stabilizer surface runaway without the ability to retrim, and consequent loss of the airplane.
Directive Details
AD Number
FAA-2011-1064
Document Number
2012-8041
Type
Rule
Publication Date
April 5, 2012
Effective Date
May 10, 2012
Affected Manufacturer
Bombardier, Inc. Model BD-100-1A10 (Challenger 300)
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2011-1064
Topics
Official Documents
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