Airworthiness directives › 2017-19-11
AD 2017-19-11 Airworthiness Directives; Bombardier, Inc., Airplanes
Models named: BD-700-1A10, BD-700-1A11. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes, certificated in any category, serial numbers 9002 and subsequent.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(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.
Unsafe condition
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). This CCMR task tests the pitch feel (PF) and rudder travel limiter actuator (RTLA) back-up modules in the flight control unit (FCU) to detect dormant failures. We are issuing this AD to detect and correct a dormant failure of both FCU back-up modules. This condition, in combination with other failures in the FCU, may result in the inability to maintain the minimum control requirements for the PF and RTLA, which could create hazardous flight control inputs during flight.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1