AD 2008-24-12

Unless already done: For airplanes on which elevator PCUs with P/N GT411-3800-5 or P/N GT411-3800-7, S/N 0615 and lower, are installed, excluding P/N GT411-3800-7 PCUs having a serial number listed in Table 1 of this AD, and excluding P/N GT411-3800-7 PCUs on which less than 1,000 flight hours have accumulated on the PCUs as of the effective date of this AD, do the actions specified in paragraphs (f)(1), (f)(2), and (f)(3) of this AD.

Note 1: Units listed in Table 1 of this AD have been lubricated by the vendor and the inspections required by paragraphs (f)(1), (f)(2), (f)(3), and (f)(4) of this AD are not required for those units.

(1) Within 10 flight cycles or 50 flight hours after the effective date of this AD, whichever occurs first: Inspect for damage and wear and lubricate the PCU attachment joints in accordance with Bombardier Alert Service Bulletin A700-1A11-27-024, Revision 01, dated October 3, 2008; or Bombardier Alert Service Bulletin A700-27-066, Revision 01, dated October 3, 2008; as applicable.

(2) Within 90 days or 200 flight hours after performing the actions required by paragraph (f)(1) of this AD, whichever occurs first: Repeat the inspection and lubrication of the PCU attachment joints in accordance with Bombardier Alert Service Bulletin A700-1A11-27-024, Revision 01, dated October 3, 2008; or Bombardier Alert Service Bulletin A700-27-066, Revision 01, dated October 3, 2008; as applicable.

(3) Within 45 days or 100 flight hours after performing the actions required by paragraph (f)(2) of this AD, whichever occurs first: Repeat the inspection and lubrication of the PCU attachment joints in accordance with Bombardier Alert Service Bulletin A700-1A11-27-024, Revision 01, dated October 3, 2008; or Bombardier Alert Service Bulletin A700-27-066, Revision 01, dated October 3, 2008; as applicable. Repeat the inspection thereafter at intervals not to exceed 45 days or 100 flight hours, whichever occurs first, until paragraph (f)(4) of this AD is accomplished.

(4) Completion of a disassembly with an inspection for damage, applicable corrective actions, and lubrication of the PCU attachment joint components in accordance with Bombardier Service Bulletin 700-1A11-27-025, dated October 9, 2008; or Bombardier Service Bulletin 700-27-067, dated October 9, 2008; as applicable; constitutes terminating action for the inspections required by paragraphs (f)(1), (f)(2), and (f)(3) of this AD.

(5) Unless already done, if any damage or seizure is found during any inspection required by paragraphs (f)(1), (f)(2), (f)(3), and (f)(4) of this AD, before further flight, replace the affected part in accordance with Bombardier Service Bulletin 700-1A11-27-025, dated October 9, 2008, or Bombardier Service Bulletin 700-27-067, dated October 9, 2008, as applicable.

(6) Actions done before the effective date of this AD in accordance with the Bombardier Alert Service Bulletins A700-1A11-27-024 and A700-27-066, both dated October 2, 2008, are acceptable for compliance with the corresponding requirements of this AD.

(7) Unless already done, submit a report to Bombardier of all findings found during any inspection required by this AD, in accordance with the applicable service bulletin listed in Table 2 of this AD.

(i) If the inspection was done on or after the effective date of this AD: Submit the report within 14 days after the inspection.

(ii) If the inspection was done before the effective date of this AD: Submit the report within 14 days after the effective date of this AD.

Note 2: This AD differs from the MCAI and/or service information as follows: (1) This AD does not mandate the terminating action specified in paragraph A.4. of the MCAI; it is included as an optional terminating action in paragraph (f)(4) of this AD. The planned compliance times for that action would allow enough time to provide notice and opportunity for prior public comment on the merits of those actions. Therefore, we are considering further rulemaking to require the terminating action on all affected airplanes. (2) Paragraph A.3. of the MCAI requires a one-time inspection; however, since we have changed the terminating action in paragraph A.4. of the MCAI to an optional action, paragraph (f)(3) of this AD requires repeating the inspections until the terminating action is performed. (3) This AD does not require the inspection and lubrication of PCUs specified in Paragraph B. of the MCAI. The planned compliance times for those actions would allow enough time to provide notice and opportunity for prior public comment on the merits of those actions. Therefore, we are considering further rulemaking to address this issue.