Airworthiness Directive · Amendment 39-18117 · Flight controls
Bombardier, Inc. Airplanes
This AD applies to Bombardier, Inc. Model CL-600-2B16 (CL-604 Variant) airplanes, certificated in any category, serial numbers 5301 and subsequent, equipped with horizontal stabilizer trim actuator (HSTA) part number (P/N) 604-92305-3 (vendor P/N 8454-1) or P/N 604-92305-5 (vendor P/N 8454-2).
We are superseding Airworthiness Directive (AD) 2015-02-06 for certain Bombardier, Inc. Model CL-600-2B16 (CL-604 Variant) airplanes. AD 2015-02-06 required a revision to the airplane flight manual, a revision to the maintenance or inspection program, as applicable, and replacement of horizontal stabilizer trim actuators (HSTAs) having certain part numbers. This new AD continues to require those actions and corrects certain typographical errors. This AD was prompted by the discovery of three typographical errors in AD 2015-02-06. We are issuing this AD to detect and correct loose spur gear bolts on the HSTA, which, if combined with the failure of the primary load path, could lead to failure of the HSTA and subsequent loss of the airplane.
This paragraph restates the requirements of paragraph (g) of AD 2015-02-06, Amendment 39-18073 (80 FR 5017, January 30, 2015), with no changes. Within 30 days after March 6, 2015 (the effective date of AD 2015-02-06: Revise the Normal Procedures section of the applicable Bombardier AFM to include the information in the applicable temporary revision (TR) specified in paragraph (g)(1) or (g)(2) of this AD. The TRs introduce revised procedures for the stabilizer trim system check. Operate the airplane according to the limitations and procedures in the applicable TR. The revision may be done by inserting a copy of the applicable TR specified in paragraph (g)(1) or (g)(2) of this AD into the AFM. When the TR has been included in the general revisions of the AFM, the general revisions may be inserted into the AFM, provided the relevant information in the general revision is identical to that in the applicable TR, and the TR may be removed.
(1) Bombardier Temporary Revision (TR) 604/37, dated May 21, 2013, to the Bombardier Challenger CL-604 Airplane Flight Manual, PSP 604-1.
(2) Bombardier TR 605/18, dated May 21, 2013, to the Bombardier Challenger CL-605 Airplane Flight Manual, PSP 605-1.
This paragraph restates the requirements of paragraph (h) of AD 2015-02-06, Amendment 39-18073 (80 FR 5017, January 30, 2015), with no changes. Within 30 days after March 6, 2015 (the effective date of AD 2015-02-06): Revise the maintenance or inspection program, as applicable, by incorporating procedures for an Operational Test (BITE) of the Horizontal Stabilizer Trim Controls System (HSTCS), in accordance with a method approved by the Manager, New York Aircraft Certification Office (ACO), ANE-170, FAA; or Transport Canada Civil Aviation (TCCA); or Bombardier, Inc.'s TCCA Design Approval Organization (DAO). The initial compliance time for the operational test is within 100 flight hours after March 6, 2015 (the effective date of AD 2015-02-06).
Note 1 to paragraph (h) of this AD: Bombardier Task 27-41-00-101, Operational Test (BITE) of the Horizontal Stabilizer Trim Controls System (HSTCS), provides guidance for the operational test specified in paragraph (h) of this AD. Bombardier Task 27-41-00-101 is included in the Bombardier Challenger 604 Time Limits/Maintenance Checks (TLMC) Manual; and in the Bombardier Challenger 605 TLMC Manual.
This paragraph restates the requirements of paragraph (i) of AD 2015-02-06, Amendment 39-18073 (80 FR 5017, January 30, 2015), with no changes. After the maintenance or inspection program has been revised, as required by paragraph (h) of this AD, no alternative actions (e.g., inspections) or intervals may be used unless the actions or intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (m)(1) of this AD.
This paragraph restates the requirements of paragraph (j) of AD 2015-02-06, Amendment 39-18073 (80 FR 5017, January 30, 2015), with a corrected vendor part number. For airplanes equipped with a HSTA having P/N 604-92305-3 (vendor P/N 8454-1) or P/N 604-92305-5 (vendor P/N 8454-2): Within 3,000 flight hours or 26 months after March 6, 2015 (the effective date of AD 2015-02-06), whichever occurs first, replace any HSTA having P/N 604-92305-3 (vendor P/N 8454-1) or P/N 604-92305-5 (vendor P/N 8454-2) with a HSTA having P/N 604-92305-7 (vendor P/N 8454-3), in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 604-27-032, Revision 02, dated April 22, 2014; or Bombardier Service Bulletin 605-27-002, Revision 02, dated April 22, 2014; as applicable.
This paragraph restates the requirements of paragraph (k) of AD 2015-02-06, Amendment 39-18073 (80 FR 5017, January 30, 2015), with no changes. This paragraph provides credit for the actions required by paragraph (j) of this AD if those actions were performed before March 6, 2015 (the effective date of AD 2015-02-06) using the service information identified in paragraphs (k)(1) through (k)(4) of this AD, as applicable. This service information is not incorporated by reference in this AD.
(1) Bombardier Service Bulletin 604-27-032, dated September 10, 2012.
(2) Bombardier Service Bulletin 604-27-032, Revision 01, dated April 29, 2013.
(3) Bombardier Service Bulletin 605-27-002, dated September 10, 2012.
(4) Bombardier Service Bulletin 605-27-002, Revision 01, April 29, 2013.
This paragraph restates the requirements of paragraph (l) of AD 2015-02-06, Amendment 39-18073 (80 FR 5017, January 30, 2015), with no changes. As of March 6, 2015 (the effective date of AD 2015-02-06), no person may install any HSTA having P/N 604-92305-3 (vendor P/N 8454-1) or 604-92305-5 (vendor P/N 8454-2) on any airplane.
