2015-12-06: Fuselage

Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: PART 39--AIRWORTHINESS DIRECTIVES 0 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. Sec. 39.13 [Amended] 0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD): 2015-12-06 Learjet Inc.: Amendment 39-18180; Docket No. FAA-2014- 0249; Directorate Identifier 2012-NM-211-AD. (a) Effective Date This AD is effective July 21, 2015. (b) Affected ADs None. (c) Applicability This AD applies to Learjet Inc. Model 45 airplanes, certificated in any category, as identified in Bombardier Recommended Service Bulletin 40-56-03, Revision 1, dated October 15, 2012 (for airplanes having serial numbers (S/Ns) 45-2000 through 45-2120 inclusive, and S/Ns 45-2122 through 45-2130 inclusive); and BombardierRecommended Service Bulletin 45-56-3, Revision 1, dated October 15, 2012 (for airplanes having S/Ns 45-005 through 45-427 inclusive). (d) Subject Air Transport Association (ATA) of America Code 53, Fuselage. [[Page 34261]] (e) Unsafe Condition This AD was prompted by reports of non-conforming windshield supports (coupe rails). We are issuing this AD to detect and correct non-conforming windshield supports, which could result in uncontrolled cabin depressurization, and compromise of the capability of the windshield to withstand a bird strike. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Inspections and Corrective Actions Within 600 flight hours or 36 months after the effective date of this AD, whichever occurs first: Do the inspections specified in paragraphs (g)(1) through (g)(3) of this AD. Do all inspections and corrective actions specified in paragraphs (g)(1) through (g)(3) of thisAD, in accordance with the Accomplishment Instructions of Bombardier Recommended Service Bulletin 40-56-03, Revision 1, dated October 15, 2012 (for airplanes having S/Ns 45-2000 through 45-2120 inclusive, and 45-2122 through 45-2130 inclusive); or Bombardier Recommended Service Bulletin 45-56-3, Revision 1, dated October 15, 2012 (for airplanes having S/Ns 45-005 through 45-427 inclusive). (1) Do a general visual inspection of the coupe rails to detect gouging and scratches and to determine whether a radius has been removed or damaged. (i) If gouging or scratches are found, before further flight, burnish or blend the gouges and scratches. (ii) If the radius has been removed or damaged, before further flight, restore the radius. (2) Do an ultrasound inspection to measure the dimensions of the lower coupe rails. (i) If the coupe rail has an ``X'' dimension of 0.246 (6.248 millimeters (mm)) or greater, and a ``Y'' dimension of 0.148 (3.759 mm) or greater: Before further flight, identify the coupe rail, in accordance with table 1 of Bombardier Recommended Service Bulletin 40-56-03, Revision 1, dated October 15, 2012 (for airplanes having S/Ns 45-2000 through 45-2120 inclusive, and S/Ns 45- 2122 through 45-2130 inclusive); or Bombardier Recommended Service Bulletin 45- 56-3, Revision 1, dated October 15, 2012 (for airplanes having S/Ns 45-005 through 45-427 inclusive). (ii) If the coupe rail has an ``X'' dimension between 0.246 (6.248 mm) and 0.166 (4.216 mm) or a ``Y'' dimension between 0.148 (3.759 mm) and 0.134 (3.403 mm): Before further flight, identify the coupe rail, in accordance with table 2 of Bombardier Recommended Service Bulletin 40-56-03, Revision 1, dated October 15, 2012 (for airplanes having S/Ns 45-2000 through 45-2120 inclusive, and S/Ns 45- 2122 through 45-2130 inclusive); or Bombardier Recommended Service Bulletin 45-56-3, Revision 1, dated October 15, 2012 (for airplanes having S/Ns 45-005 through 45-427 inclusive). (iii) If anycoupe rail ``X'' dimension is below 0.166 (4.216 mm) or ``Y'' dimension is below 0.134 (3.403 mm): Before further flight, replace that coupe rail with a new coupe rail. (3) Do a flange and radius eddy current inspection for cracks of the left-hand and right-hand lower coupe rails. (i) If no crack is found, before further flight, mark the new data plate. (ii) If any crack is found, before further flight, replace the coupe rail with a new coupe rail. (h) Maintenance/Inspection Program Revision Within 30 days after the effective date of this AD: Revise the maintenance or inspection program (as applicable) to incorporate tasks for inspections of the lower coupe rail radius/windscreen retainer attach and replacement of the coupe rails, in accordance with a method approved by the Manager, Wichita Aircraft Certification Office (ACO), ACE-115W, FAA. Note 1 to paragraph (h) of this AD: For Model 40 airplanes, the instructions provided in Bombardier Learjet 40 Maintenance Manual MM-105, Revision 30, dated June 2, 2014, provide guidance for revising the maintenance or inspection program to include replacements of the coupe rails and maintenance requirements/ structure checks of the lower coupe rail radius/windscreen retainer attach. This service information is not incorporated by reference in this AD. Note 2 to paragraph (h) of this AD: For Model 45 airplanes, the instructions provided in Bombardier Learjet 45 Maintenance Manual MM-104, Revision 62, dated June 2, 2014, provide guidance for revising the maintenance or inspection program to include replacements of the coupe rails and maintenance requirements/ structure checks of the lower coupe rail radius/windscreen retainer attach. This service information is not incorporated by reference in this AD. (i) No Alternative Actions or Intervals After accomplishing the revision required by paragraph (h) of this AD, no alternative IRN task or interval may be used unless the IRN task or interval is approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (k) of this AD. (j) Credit for Previous Actions This paragraph provides credit for actions required by paragraph (g) of this AD, if those actions were performed before the effective date of this AD using Bombardier Recommended Service Bulletin 40-56- 03, dated April 30, 2012 (for airplanes having S/Ns 45-2000 through 45-2120 inclusive, and 45-2122 through 45-2130 inclusive); or Bombardier Recommended Service Bulletin 45-56-3, dated April 30, 2012 (for airplanes having S/Ns 45-005 through 45-427 inclusive); which are not incorporated by reference in this AD. (k) Alternative Methods of Compliance (AMOCs) (1) The Manager, Wichita ACO, 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 local Flight Standards District Office, as appropriate. If sending information directly to the manager of the ACO, send it to the attention of the person identified in paragraph (l)(1) of this AD. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office. (l) Related Information (1) For more information about this AD, contact Paul Chapman, Aerospace Engineer, Airframe Branch, ACE-118W, FAA, Wichita ACO, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, KS 67209; phone: 316-946-4152; fax: 316-946-4107; email: paul.chapman@faa.gov. (2) Service information identified in this AD that is not incorporated by reference is available at the addresses specified in paragraphs (m)(3) and (m)(4) of this AD. (m) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR)of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) Bombardier Recommended Service Bulletin 40-56-03, Revision 1, dated October 15, 2012. (ii) Bombardier Recommended Service Bulletin 45-56-3, Revision 1, dated October 15, 2012. (3) For service information identified in this AD, contact Learjet, Inc., One Learjet Way, Wichita, KS 67209-2942; telephone 316-946-2000; fax 316-946-2220; email ac.ict@aero.bombardier.com; Internet http://www.bombardier.com. (4) You may view this service information at FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425-227-1221. (5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For informationon the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.