Airworthiness Directive · Amendment 39-22261 · Wings
Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes
This AD applies to Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes, certificated in any category, as identified in Transport Canada AD CF-2021-43, dated November 29, 2021 (Transport Canada AD CF-2021-43).
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500- 1A11 airplanes. This AD was prompted by a report that corrosion and wear were discovered on the slat tracks due to insufficient grease applied to the slat tracks during production. This AD requires repetitive cleaning and greasing of all slat tracks to prevent damage and corrosion; doing repetitive inspections of the slat tracks for any damage or corrosion, and the correct application of grease; and applicable corrective actions; as specified in a Transport Canada AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, Transport Canada AD CF-2021-43.
(1) Where Transport Canada AD CF-2021-43 refers to its effective date, this AD requires using the effective date of this AD.
(2) Where Transport Canada AD CF-2021-43 refers to hours air time, this AD requires using flight hours.
(3) Where “the VSB [vendor service bulletin]” referenced in Transport Canada AD CF-2021-43 specifies to do a magnetic particle inspection or an eddy current inspection of the repaired area for any cracking, for this AD if any cracking is found, the cracking must be repaired before further flight using a method approved by the Manager, New York ACO Branch, FAA; or Transport Canada; or Airbus Canada Limited Partnership's Transport Canada Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature.
(4) Where Transport Canada AD CF-2021-43 specifies to accomplish certain actions using both the “applicable SB” and “the VSB” as defined in Transport Canada AD CF-2021-43, this AD requires using only “the VSB.”.
(5) Paragraph C. of Transport Canada AD CF-2021-43 specifies to report inspection results to Airbus Canada Limited Partnership within a certain compliance time. For this AD, report inspection results at the applicable time specified in paragraph (h)(5)(i) or (ii) of this AD.
(i) If the inspection was done on or after the effective date of this AD: Submit the report within 30 days after the inspection.
(ii) If the inspection was done before the effective date of this AD: Submit the report within 30 days after the effective date of this AD.
(6) Where “the VSB” referenced in Transport Canada AD CF-2021-43 specifies to record the level of grease (thin or thick), for this AD a thin grease level is one that uniformly covers the slat tracks, slat track rollers, slat pinion gear bearings, and the slat pinion gears; and a thick grease level is one that extends beyond the slat tracks, slat track rollers, slat pinion gear bearings, and the slat pinion gears or that inhibits function of the slat tracks.
(7) Where Transport Canada AD CF-2021-43 specifies accomplishing certain actions using “the VSB,” for this AD replace the text “Part A of the VSB” with “section 2., Procedure, of Part A of the VSB.” and replace the text “Part B of the VSB” with “section 2., Procedure, of Part B of the VSB.”
(8) Where step 2.7 of Part B of “the VSB” referenced in Transport Canada AD CF-2021-43 specifies to inspect certain areas of the slat tracks, this AD allows inspecting as specified in paragraphs (h)(8)(i) and (ii) of this AD.
(i) For slat tracks 1 through 3 on the left and right wings: Inspect the upper and lower surfaces of the slat tracks and visible portions of the side surfaces of the slat tracks only, excluding underneath the pinion gear on slat tracks 1 and 3 and underneath the forward and aft upper and lower main rollers on slat tracks 1 through 3.
(ii) For slat tracks 4 through 11 on the left and right wings: Inspect the lower surfaces of the slat tracks only, excluding underneath the pinion gear on slat tracks 4, 6, 7, 9, 10, and 11 and underneath the forward and aft lower main rollers on slat tracks 4 through 11.
(9) Where step 2.5 of Part A of “the VSB” referenced in Transport Canada AD CF-2021-43 specifies applying grease (04-400) in front of the main rollers and side flanges of the slat track, this AD allows applying grease as specified in paragraphs (h)(9)(i) and (ii) of this AD.
(i) For slat tracks 1 through 3 on the left and right wings: Apply grease (04-004) on the slat tracks in the side flanges of the slat tracks, the portions of the slat tracks in front of the forward upper and lower main rollers, and the upper and lower surfaces of the slat tracks between the forward and aft upper and lower main rollers, excluding underneath the aft upper and lower main rollers.
(ii) For slat tracks 4 through 11 on the left and right wings: Apply grease (04-004) on the slat tracks in the side flanges of the slat tracks, the portions of the slat tracks in front of the forward upper and lower main rollers, and the lower surfaces of the slat tracks between the forward and aft lower main rollers, excluding underneath the pinion gear on slat tracks 4, 6, 7, 9, 10, and 11 and underneath the aft lower main roller on slat tracks 4 through 11.
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, New York ACO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the certification office, send it to ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7300. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office.
(2) Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, New York ACO Branch, FAA; or Transport Canada; or Airbus Canada Limited Partnership's Transport Canada DAO. If approved by the DAO, the approval must include the DAO-authorized signature.
For more information about this AD, contact Chirayu Gupta, Aerospace Engineer, Mechanical Systems and Administrative Services Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7300; email 9-avs-nyaco-cos@faa.gov.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
