Airworthiness Directive · Amendment 39-15783 · Lights
Airbus Model A318, A319, A320, and A321 Airplanes
This AD applies to Airbus Model A318, A319, A320, and A321 airplanes, certificated in any category; all certified models; all serial numbers; on which classical standby instruments have been installed per Airbus Modification 20011 or 21999 in production, or per Airbus Service Bulletin A320-34-1280 in service; excluding airplanes identified in paragraphs (c)(1) or (c)(2) of this AD.
(1) Airplanes on which ISIS equipment was installed per Airbus Modification 27620 in production or per Airbus Service Bulletin A320-34-1261 or Airbus Service Bulletin A320-34-1372 in service.
(2) Airplanes on which Airbus Modification 37329 or 37330 was installed in production or per Airbus Service Bulletin A320-33-1057 in service.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done, within 42 months after the effective date of this AD: Modify the electrical supply logic of the under glare shield flood lighting in accordance with the instructions given in Airbus Mandatory Service Bulletin A320-33-1057, Revision 01, dated January 31, 2008. Modifications done before the effective date of this AD in accordance with Airbus Service Bulletin A320-33-1057, dated May 11, 2007, are acceptable for compliance with the modification in this paragraph.
Note: This AD differs from the MCAI and/or service information as follows: No differences.
