AD 2003-12-06 Airworthiness Directives; Bombardier Model CL-600-2C10 (Regional Jet Series 700 & 701) Series Airplanes

Model CL-600-2C10 (Regional Jet Series 700 & 701) series airplanes, serial numbers 10004 through 10119 inclusive; certificated in any category.

Required as indicated, unless accomplished previously. To prevent the wing anti-ice (WAI) ducts from collapsing, cracking, or rupturing, consequent leakage of hot air in the under-floor pressurized area of the fuselage when the anti-ice system is turned on, insufficient heat for the anti-ice system, and aerodynamic degradation, accomplish the following: Referenced Service Information (a) The term “service bulletin,” as used in this AD, means the Accomplishment Instructions of CRJ 700/900 Series Regional Jet (Bombardier) Alert Service Bulletin A670BA-30-007, Revision A, dated April 15, 2003, including Appendices A and B, dated March 18, 2003. Airplane Flight Manual (AFM) Revision (b) Within 48 hours after the effective date of this AD, revise the Limitations Section of the CRJ 700 AFM to include the following (this may be accomplished by inserting a copy of this AD into the AFM): “1. Anti-Ice Bleed Leak Detection Controller (AILC) Channels (see Note 1): Flight with “WING A/I FAULT” status message on the engine indication and crew alerting system (EICAS) is not authorized, except as follows: One may be inoperative as indicated by “WING A/I FAULT” status message on EICAS provided: (a) Wing Anti-Ice switch is selected OFF, and (b) Operations are not conducted into known or forecast icing conditions. 2. Wing/Fuselage Anti-Ice Bleed Leak Detection Loops (see Note 1): Flight with Wing/Fuselage Anti-Ice Bleed Leak Detection Loops inoperative is not authorized, except as follows: One loop (A or B) may be inoperative provided: (a) Wing Anti-Ice switch is selected OFF, and (b) Operations are not conducted into known or forecast icing conditions. Note 1: This limitation supersedes the Master Minimum Equipment List (MMEL).” Detailed Inspection and Corrective Actions if Necessary (c) Within 150 flight hours after the effective date of this AD, do a detailed inspection to detect damage of the four WAI ducts and to determine if the external shrouds of the WAI ducts are open or cracked, per the alert service bulletin. (1) If no discrepancy is found, no further action is required by this AD. (2) If any external shroud of a WAI duct is found open or cracked, before further flight, inspect the surrounding equipment and structure per a method approved by the Manager, New York Aircraft Certification Office, FAA, or Transport Canada Civil Aviation (TCCA) (or its delegated agent). (3) If any damaged WAI duct is found, before further flight, replace the WAI duct with a new duct or a duct with the same part number (P/N) that is free of any dent, crease, or other handling damage, per the alert service bulletin. Note 1: For the purposes of this AD, a detailed inspection is defined as: “An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at intensity deemed appropriate by the inspector. Inspection aids such as mirror, magnifying lenses, etc., may be used. Surface cleaning and elaborate access procedures may be required.” Optional Terminating Action (d) Replacement of all four WAI ducts with new ducts having P/N GG670-80504-5 or -6, or P/N GG670-80312-3 or -4, as applicable, per the service bulletin, terminates the requirements of this AD. After doing the replacement, the AFM revision required by paragraph (b) of this AD may be removed. Reporting Requirement (e) Submit a report of the results of the inspection required by paragraph (c) of this AD per the alert service bulletin specified in paragraph (c) of this AD. Information collection requirements contained in this AD have been approved by the Office of Management and Budget (OMB) under the provisions of the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq. ) and have been assigned OMB Control Number 2120-0056. (1) If the inspection was done after the effective date of this AD: Submit the report within 14 days after the inspection. (2) If the inspection was accomplished prior to the effective date of this AD: Submit the report within 14 days after the effective date of this AD. Alternative Methods of Compliance (f) In accordance with 14 CFR 39.19, the Manager, New York ACO, FAA, is authorized to approve alternative methods of compliance for this AD. Incorporation by Reference (g) Unless otherwise specified in this AD, the actions must be done per CRJ 700/900 Series Regional Jet (Bombardier) Alert Service Bulletin A670BA-30-007, Revision A, dated April 15, 2003, including Appendices A and B, dated March 18, 2003. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station Centre-ville, Montreal, Quebec H3C 3G9, Canada. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, New York Aircraft Certification Office, 10 Fifth Street, Third Floor, Valley Stream, New York; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. Note 2: The subject of this AD is addressed in Canadian airworthiness directive CF-2003-07, effective on March 25, 2003. Effective Date (h) This amendment becomes effective on June 27, 2003. Issued in Renton, Washington, on June 5, 2003. Ali Bahrami, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 03-14676 Filed 6-11-03; 8:45 am] BILLING CODE 4910-13-P