Airworthiness Directive · Amendment 39-19041 · Flight controls
Bombardier, Inc., Airplanes
This AD applies to Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes, certificated in any category, serial numbers 9002 and subsequent.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. This AD was prompted by a determination that a certain task in the aircraft maintenance manual (AMM) will not accomplish the intent of a candidate certification maintenance requirement (CCMR) for detecting dormant failures of the pitch feel (PF) and rudder travel limiter actuator (RTLA) back-up modules. This AD requires doing an operational test of the flight control unit (FCU) back-up modules, and repair if necessary. We are issuing this AD to address the unsafe condition on these products.
(1) For airplanes with an FCU that has accumulated 3,000 total flight hours or more as of the effective date of this AD: Within 15 months or 700 flight hours, whichever occurs first, after the effective date of this AD, do an operational test of the FCU back-up modules, in accordance with a method approved by the Manager, New York ACO Branch, FAA.
(2) For airplanes with an FCU that has accumulated less than 3,000 total flight hours as of the effective date of this AD, and on which an operational test has been accomplished as specified in AMM task 27-61-05-710-801: Within 15 months or 700 flight hours, whichever occurs first, after the effective date of this AD, do an operational test of the FCU back-up modules, in accordance with a method approved by the Manager, New York ACO Branch, FAA.
(3) For airplanes with an FCU that has accumulated less than 3,000 total flight hours as of the effective date of this AD, and on which an operational test has not been accomplished as specified in AMM task 27-61-05-710-801: Before the FCU accumulates 3,000 total flight hours or within 30 days after the effective date of this AD, whichever occurs later, perform an operational test of the FCU back-up modules, in accordance with a method approved by the Manager, New York ACO Branch, FAA.
If any FCU fails any operational test required by this AD: Before further flight, repair using a method approved by the Manager, New York ACO Branch, FAA; or Transport Canada Civil Aviation (TCCA); or Bombardier, Inc.'s TCCA Design Approval Organization (DAO).
