Airworthiness directives › 2021-10-22
AD 2021-10-22 Airworthiness Directives; Bombardier, Inc., Airplanes
Models named: BD-700-1A10. 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 airplanes, certificated in any category, serial numbers 9657 through 9844 inclusive.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 30 months after the effective date of this AD: Perform a modification of the fuel pipe bracket assembly and refuel tube assembly; do all related investigative actions and applicable corrective actions; and perform an operational test of the refuel and defuel system; in accordance with paragraphs 2.B. and 2.C. of the Accomplishment Instructions of Bombardier Service Bulletin 700-28-6006, dated June 1, 2020. All related investigative and corrective actions must be done before further flight.
Unsafe condition
This AD was prompted by a report indicating that during installation, a fuel pipe bracket assembly on the intermediate rib in the center fuel tank was mislocated, resulting in an offset between the fitting assembly and the refuel/defuel tube assembly. The FAA is issuing this AD to address the offset, which could cause a preload on the fuel pipes and reduce their ability to absorb shock or vibration-induced loads, making the tube and clamp more prone to stress corrosion cracking. This could lead to failure of the coupling and the bracket and p-clamp assembly, resulting in fuel leakage and loss of electrical bonding between fuel pipes, and lightning-induced sparking that could induce fuel ignition.
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