Airworthiness Directive · Amendment 39-16051 · Flight controls
Airbus Model A300-600 Airplanes
This AD applies to Airbus Model A300 B4-601, B4-603, B4-605R, B4-620, B4-622, B4-622R, F4-605R, F4-622R, C4-605R Variant F airplanes, all serial numbers, certificated in any category; on which Smith spoiler actuators having part number (P/N) P376A0002-05, -06, -07, or -09, or P/N P725A0001-00 are installed.
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 700 flight hours after the effective date of this AD, do the following actions.
(1) Identify the total flight hours accumulated on each spoiler actuator at positions 3 through 7 on the left- and right-hand sides of the airplane (FIN 22CP/23CP, 24CP/25CP, 26CP/27CP, 60CP/61CP, and 62CP/63CP), in accordance with the Accomplishment Instructions of Airbus Mandatory Service Bulletin A300-27A6062, dated July 6, 2007.
Note 1: Smiths Service Information Letters SIL 27-01, dated June 2007; and SIL 27-02, dated May 2007; may be used as additional sources of guidance to identify the total flight hours accumulated on each spoiler actuator.
(2) For airplanes on which the status of any spoiler actuator is unknown (unknown number of accumulated flight hours, unknown date of manufacture, and/or unknown serial number) the actuator must be considered as having exceeded 55,750 total flight hours.
(3) For airplanes on which all three hydraulic circuits have a spoiler actuator that has accumulated or exceeds 55,000 total flight hours: Before the accumulation of 55,750 total flight hours or within 700 flight hours after the effective date of this AD, whichever occurs later, on at least one hydraulic circuit, interchange the spoiler actuator with a serviceable unit from another hydraulic circuit, or replace the spoiler actuator with a serviceable unit, in accordance with the Accomplishment Instructions of Airbus Mandatory Service Bulletin A300-27-6060, dated February 18, 2008.
(4) For airplanes on which the actions required by paragraph (f)(1) of this AD, and, as applicable, paragraph (f)(3) of this AD have been accomplished, each airplane must continue to have at least one hydraulic circuit fitted with spoiler actuators that do not exceed 55,750 total flight hours.
Note 2: For the purposes of this AD, a serviceable unit is a unit that has accumulated less than 55,750 flight hours.
(5) The operator must not interchange or replace spoiler actuators on more than two hydraulic circuits at the same time. This will mitigate the risk of having a malfunction on the three hydraulic systems at the same time.
Note 3: This AD differs from the MCAI and/or service information as follows: This AD does not include the reporting requirement specified in paragraph (1) of the MCAI. The MCAI carried this requirement forward from European Aviation Safety Agency (EASA) Airworthiness Directive 2007-0245, dated September 5, 2007. We previously determined that no action was required on our part regarding EASA AD 2007-0245.
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.
