Airworthiness Directive · Amendment 39-15320 · Hydraulic power
BAE Systems (Operations) Limited Model BAe 146 and Avro 146-RJ Airplanes
This AD applies to BAE Systems (Operations) Limited Model BAe 146-100A, -200A, and -300A series airplanes; and Model Avro 146-RJ70A, 146-RJ85A, and 146-RJ100A airplanes; certificated in any category, all models, all serial numbers.
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: "An accumulator cylinder had material defects and suffered an in-flight burst failure causing damage to the aircraft structure." We are issuing this AD to require actions to correct the unsafe condition on these products.
Unless already done, do the following actions.
(1) Within 30 months after the effective date of this AD, identify the installed accumulator in accordance with paragraph 2.C. of BAE Systems (Operations) Limited Inspection Service Bulletin ISB.29-047, dated October 3, 2006, which makes reference to APPH Service Bulletin AIR91666-29-03, dated July 2006.
(2) When an accumulator is identified as being affected by this AD, before further flight after accomplishing the actions required in paragraph (f)(1) of this AD, remove the accumulator in accordance with paragraph 2.D. of BAE Systems (Operations) Limited Inspection Service Bulletin ISB.29-047, dated October 3, 2006, and do a magnetic particle inspection of the cylinder for any defects in accordance with the Accomplishment Instructions of APPH Service Bulletin AIR91666-29-03, dated July 2006.
(3) If any defect is found during the inspection required in paragraph (f)(2) of this AD, before next flight, replace the accumulator with a serviceable unit in accordance with the Accomplishment Instructions of APPH Service Bulletin AIR91666-29-03, dated July 2006.
(4) After the effective date of this AD, no person may install a spare accumulator identified by APPH Service Bulletin AIR91666-29-03, dated July 2006, as a replacement part, unless it has been inspected in accordance with APPH Service Bulletin AIR91666-29-02, dated March 2006; or APPH Service Bulletin AIR91666-29-03, dated July 2006 (see second Note in paragraph 1.D.(1) of BAE Systems (Operations) Limited Inspection Service Bulletin ISB.29-047, dated October 3, 2006, for further explanation).
Note: This AD differs from the MCAI and/or service information as follows: (1) Where the MCAI specifies to identify the installed accumulator within 6 weeks after the effective date of the AD, we have determined that the identification may be done within 30 months after the effective date of this AD to coincide with the compliance time for the magnetic particle inspection. In making this determination, we considered the maximum interval of time allowable for all affected airplanes to continue to operate without compromising safety, fleet usage, and the availability of replacement parts.
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.
