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Airworthiness directives › 2003-26-03

AD 2003-26-03 Airworthiness Directives; Airbus Model A319, A320, and A321 Series Airplanes Equipped With Certain Litton Air Data Inertial Reference Units

2004-01-27
2003-12-23
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Airframe
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Models named: A319, A320, A321 series. Read the applicability below — it usually turns on serial or part numbers too.

Applicability*9

Model A319, A320, and A321 series airplanes; certificated in any category; equipped with Litton air data inertial reference units (ADIRU) installed per Airbus Modification 24852, 25108, 25336, 26002, or 28218; except those airplanes on which Airbus Modification 30650 or 30872 has been accomplished.

Compliance

Required as indicated, unless accomplished previously. To prevent failure of ADIRU 3 during flight, which could result in loss of one source of critical attitude and airspeed data and reduce the ability of the flightcrew to control the airplane, accomplish the following: Modification (a) Within 2 years after the effective date of this AD: Do the modifications specified in paragraphs (a)(1), (a)(2), and (a)(3) of this AD, as applicable, in accordance with paragraphs A. through D. of the Accomplishment Instructions of Airbus Service Bulletin A320-25-1248, dated February 16, 2001; as applicable. (1) For all airplanes: Modify the shelf (floor panel) above ADIRU 3 by installing shims between the shelf and the webs of the shelf support structure. (2) For airplanes with Airbus Modification 25900P3941 or Airbus Service Bulletin A320-25-1200 accomplished as of the effective date of this AD: Modify the polycarbonate guard (umbrella) protecting the ADIRUs by installing shims between the guard and the shelf support structure. (3) For airplanes with Airbus Modification 23027P2852 or Airbus Service Bulletin A320-52-1038 accomplished as of the effective date of this AD: Modify the ladder located in the avionics compartment by machining the slot at the foot of the ladder to increase the depth by 0.236 inch. Alternative Methods of Compliance (b) In accordance with 14 CFR 39.19, the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate, is authorized to approve alternative methods of compliance for this AD. Incorporation by Reference (c) The actions shall be done in accordance with Airbus Service Bulletin A320-25-1248, dated February 16, 2001. 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 Airbus, 1 Rond Point Maurice Bellonte, 31707 Blagnac Cedex, France. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. Note 1: The subject of this AD is addressed in French airworthiness directive 2002-125(B), dated March 6, 2002. Effective Date (d) This amendment becomes effective on January 27, 2004. Issued in Renton, Washington, on December 12, 2003. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 03-31270 Filed 12-22-03; 8:45 am] BILLING CODE 4910-13-P

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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1