Airworthiness Directive · Amendment 39-13740 · BAE Systems (Operations) Limited (Jetstream) Model 4101 Airplanes
BAE Systems (Operations) Limited (Jetstream) Model 4101 Airplanes
All Model Jetstream 4101 airplanes, certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to all BAE Systems (Operations) Limited (Jetstream) Model 4101 airplanes, that requires various inspections of the fuselage nose structure between stations 4 and 11, and corrective actions if necessary. This action is necessary to detect and correct fatigue cracking in the primary structure of the nose of the airplane at the forward avionics bay (fuselage stations 4 to 11), which could result in reduced structural integrity of the airplane. This action is intended to address the identified unsafe condition.
To detect and correct fatigue cracking in the primary structure of the nose of the airplane at the forward avionics bay (fuselage stations 4 to 11), which could result in reduced structural integrity of the airplane, accomplish the following:
(a) Perform detailed, radiographic, and eddy current inspections of the fuselage nose structure between stations 4 and 11 for discrepancies (including cracking, corrosion, and exposed wiring), per the Accomplishment Instructions of BAE Systems (Operations) Limited Service Bulletin J41-53-047, Revision 1, dated July 19, 2002, except that reporting results of inspection findings is not required by this AD. Do the inspections at the later of the times specified in paragraphs (a)(1) and (a)(2) of this AD. Repeat the inspections thereafter at intervals not to exceed 6,000 landings.
(1) Prior to the accumulation of 10,000 total landings, but not before the accumulation of 7,000 total landings.
(2) Within 3,000 landings after the effective date of this AD, or at the next 8-year environmental (corrosion) inspection, whichever occurs first.
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.”
(b) For the inspections of the surround structure for the avionics bay doors, operators may either remove the high intensity radiated field (HIRF) seal and do a detailed inspection, or do radiographic and eddy current inspections with the HIRF seal in place.
(c) If any discrepancy is found during any inspection required by this AD, before further flight, repair per BAE Systems (Operations) Limited Service Bulletin J41-53-047, Revision 1, dated July 19, 2002. Where the service bulletin specifies contacting the manufacturer for disposition of repairs, before further flight, repair per a method approved by the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate; or the Civil Aviation Authority (or its delegated agent).
(d) In accordance with 14 CFR 39.19, the Manager, International Branch, ANM-116, FAA, is authorized to approve alternative methods of compliance for this AD.
(e) Unless otherwise specified in this AD, the actions shall be done in accordance with BAE Systems (Operations) Limited Service Bulletin J41-53-047, Revision 1, dated July 19, 2002. 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 British Aerospace Regional Aircraft American Support, 13850 Mclearen Road, Herndon, Virginia 20171. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
Note 2: The subject of this AD is addressed in British airworthiness directive 001-06-2001.
