Airworthiness directives › 2021-21-04
AD 2021-21-04 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 through 9879 inclusive, 9998, 60001 through 60005 inclusive, 60007, 60009, 60015, 60016, and 60024.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 15 months or 750 flight hours, whichever occurs first, after the effective date of this AD: Verify the proper installation of the sliding bushings by doing an inspection (gap check) for discrepancies of the front and aft engine mounts, in accordance with paragraphs 2.B. through 2.F. of the Accomplishment Instructions of the applicable service information specified in figure 1 to paragraph (g) of this AD. If any discrepancy is found: 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). If approved by the DAO, the approval must include the DAO-authorized signature. Where a serial number is identified in more than one row in figure 1 to paragraph (g) of this AD, the applicable service information is identified based on the marketing designations in paragraph 1.M., “Equivalent Service Bulletins,” of the service information. ER03NO21.001
Unsafe condition
This AD was prompted by reports that the sliding bushings in the forward engine mount system were missing. The FAA is issuing this AD to address redistribution of load/stress on the mount components, which may decrease the component fatigue life; failure of the mount structural components could result in the loss of the engine attachment to the airframe.
Affected ADs
None.
Read the original on the Federal Register →
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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