Airworthiness Directive · Amendment 39-11978 · Airbus Model A310 and A300-600 Series Airplanes
Airbus Model A310 and A300-600 Series Airplanes
Model A310 series airplanes equipped with flight control computers (FCC) having part number (P/N) B350AAM4 or B470ABM2, and Model A300-600 series airplanes equipped with FCC's having P/N B470AAM2; certificated in any category; except those airplanes on which Airbus Modification 11899 or 11900 (Airbus Service Bulletin A310-22-2048 or A310-22-2049 or A300-22-6038) has been accomplished.
Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been otherwise modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (b) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A310 and A300-600 series airplanes, that requires replacement of the flight control computers (FCC) with new, improved FCC's having updated software installed. This amendment also requires, for some airplanes, modification of the wiring of the FCC's. The actions specified by this AD are intended to prevent autopilot reversions in certain flight conditions, which could result in misunderstanding by the flight crew and consequent reduced ability to take appropriate action. This action is intended to address the identified unsafe condition.
To prevent autopilot reversions in certain flight conditions, which could result in misunderstanding by the flight crew and consequent reduced ability to take appropriate action, accomplish the following:
(a) Within 26 months after the effective date of this AD, replace the FCC's with new, improved FCC's having updated software installed; and modify the wiring, as applicable; in accordance with paragraph (a)(1), (a)(2), or (a)(3), as applicable.
(1) For Airbus Model A310 series airplanes equipped with FCC's having P/N B350AAM4: Replace the FCC's in accordance with Airbus Service Bulletin A310-22-2048, Revision 01, dated March 6, 2000.
(2) For Airbus Model A310 series airplanes equipped with FCC's having P/N B470ABM2: Replace the FCC's in accordance with Airbus Service Bulletin A310-22-2049, Revision 02, dated March 6, 2000. Prior to or concurrent with the replacement, modify the wiring in accordance with Airbus Service Bulletin A310-22-2051, Revision 02, dated March 8, 2000.
(3) For Airbus Model A300-600 series airplanes equipped with FCC's having P/N B470AAM2: Replace the FCC's in accordance with Airbus Service Bulletin A300-22-6038, dated August 24, 1999. Prior to or concurrent with the replacement, modify the wiring in accordance with Airbus Service Bulletin A300-22-6040, Revision 02, dated March 6, 2000.
Note 2: Accomplishment of the actions required by paragraph (a) of this AD prior to the effective date of this AD in accordance with Airbus Service Bulletin A310-22-2048, dated December 13, 1999; A310-22-2049, dated August 24, 1999, or Revision 01, dated December 13, 1999; A310-22-2051, dated August 26, 1999, or Revision 01, dated December 13, 1999; or A300-22-6040, dated August 26, 1999, or Revision 01, dated December 13, 1999; is acceptable for compliance with the applicable actions specified in that paragraph.
Note 3: The Airbus service bulletins reference SEXTANT Service Bulletins B350AAM-22-008, B470AAM-22-013, and B470ABM-22-012, each dated September 29, 1999, as additional sources of service information for accomplishing the replacement required by this AD.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
