Airworthiness Directive · Amendment 39-11892 · Airbus Model A300, A300-600, and A310 Series Airplanes
Airbus Model A300, A300-600, and A310 Series Airplanes
Superseded. A later AD replaced this one: AD 2005-07-25. Comply with the one in force.
Model A300, A300-600, and A310 series airplanes; certificated in any category; equipped with AUXILEC transformer rectifier units (TRU) having part number (P/N) F11QB3121.
Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been 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 A300, A300-600, and A310 series airplanes, that requires replacement of the transformer rectifier units (TRU) in the avionics compartment with new, improved TRU's. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent failure of the TRU's. Failure of multiple TRU's could result in loss of the thrust reversers, autothrottle, flaps, and various systems (wing/cockpit window anti-ice, trim tank pumps, and windshield wipers) on the airplane; or incorrect information displayed to the flight crew.
To prevent failure of multiple TRU's, which could result in loss of the thrust reversers, autothrottle, flaps, and various systems (wing/cockpit window anti-ice, trim tank pumps, and windshield wipers) on the airplane; or incorrect information displayed to the flight crew; accomplish the following:
(a) Within 12 months after the effective date of this AD, replace the TRU's in the avionics compartment with new, improved TRU's, in accordance with Airbus Service Bulletin A300-24-0089 (for Model A300 series airplanes), A300-24-6068 (for Model A300-600 series airplanes), or A310-24-2077 (for Model A310 series airplanes); all Revision 01, all dated February 10, 2000; as applicable.
Note 2: Accomplishment of TRU replacements prior to the effective date of this AD in accordance with Airbus Service Bulletin A300-24-0089, dated March 4, 1998; A300-24-6068, dated January 28, 1998; or A310-24-2077, dated January 21, 1998; as applicable; is acceptable for compliance with paragraph (a) of this AD.
Note 3: The Airbus service bulletins reference AUXILEC Service Bulletin F11QB3121-24-007, dated February 2, 1998, as an additional source 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.
