Airworthiness Directive · Amendment 39-14872 · BAE Systems (Operations) Limited Model BAe 146 and Avro 146-RJ Airplanes
BAE Systems (Operations) Limited Model BAe 146 and Avro 146-RJ Airplanes
This AD applies to all 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.
The FAA is adopting a new airworthiness directive (AD) for all BAE Systems (Operations) Limited Model BAe 146 and Avro 146-RJ airplanes. This AD requires determining the part number of the lift spoiler actuators/jacks (referred to after this as "lift spoiler jacks"). For affected lift spoiler jacks, this AD requires determining the date of manufacture of the lift spoiler jacks, repetitively inspecting the eye-end assembly of the lift spoiler jacks to detect discrepancies of the assembly or associated parts, and performing corrective actions if necessary. This AD results from a report that a lift spoiler deployed in flight due to corrosion at the thread where the eye-end assembly was screwed into the piston of the lift spoiler jack. We are issuing this AD to prevent detachment of the eye-end assembly of a lift spoiler jack, which could result in uncommanded deployment of a lift spoiler in flight, and consequent reduced controllability of the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
The term “service bulletin,” as used in this AD, means the Accomplishment Instructions of BAE Systems (Operations) Limited Inspection Service Bulletin SB27-176, Revision 2, dated October 5, 2004. Although the service bulletin specifies to submit information to the manufacturer, this AD does not include that requirement. Inspections and corrective actions accomplished before the effective date of this AD in accordance with BAE Systems (Operations) Limited Inspection Service Bulletin SB27-176, dated October 1, 2003; or Revision 1, dated January 13, 2004; are acceptable for compliance with the corresponding actions required by this AD.
Within 30 days after the effective date of this AD: Determine the P/N of all six lift spoiler jacks. A review of airplane maintenance records is an acceptable method of determining the P/N if the P/N can be conclusively determined from that review.
(1) If no lift spoiler jack having P/N P308-45-0002 or P308-45-0102 is installed: No further action is required by this paragraph.
(2) For any lift spoiler jack having P/N P308-45-0002 or P308-45-0102: Before further flight, inspect the lift spoiler jack to determine its serial number (S/N) and date of manufacture. A review of airplane maintenance records is acceptable in lieu of this inspection if the S/N and date of manufacture can be conclusively determined from that review.
For any lift spoiler jack having P/N P308-45-0002 or P308-45-0102: At the applicable compliance time specified in paragraph (h)(1) or (h)(2) of this AD, perform a detailed inspection for discrepancies of the eye-end assembly of the lift spoiler jack, associated hardware, and the thread of the piston where the eye-end assembly attaches, in accordance with the service bulletin. Discrepancies include but are not limited to evidence of corrosion or damaged or fretted threads.
(1) For lift spoiler jacks identified in paragraphs (h)(1)(i) and (h)(1)(ii) of this AD: Within 30 days after the effective date of this AD.
(i) Any lift spoiler jack having a S/N prefixed with “DAWX” or “CSW” (regardless of the date of manufacture).
(ii) Any lift spoiler jack having P/N P308-45-0002 or P308-45-0102, with a date of manufacture on or before December 31, 1999.
(2) For lift spoiler jacks with a date of manufacture on or after January 1, 2000, except those with S/Ns prefixed with “DAWX” or “CSW”: Within 5 months after the effective date of this AD.
Note 1: For the purposes of this AD, a detailed inspection is: “An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate procedures may be required.”
(i) Repeat the inspection required by paragraph (h) of this AD and do corrective actions based on the inspection findings, in accordance with paragraph (i)(1), (i)(2), or (i)(3) of this AD, as applicable.
(1) If no discrepancy of the eye-end assembly of the lift spoiler jack is found: Repeat the inspection required by paragraph (h) of this AD within 48 months, and, based on the findings during that repeat inspection, repeat the inspection and do corrective actions, as applicable, in accordance with paragraph (i) of this AD.
(2) If light corrosion, as defined in the service bulletin, but no other discrepancy, is found: Repeat the inspection required by paragraph (h) of this AD within 24 months, and, based on the findings during that repeat inspection, repeat the inspection and do corrective actions, as applicable, in accordance with paragraph (i) of this AD.
(3) If severe corrosion, as defined in the service bulletin, or any damaged or fretted thread, is found: Before further flight, replace the eye-end assembly of the lift spoiler jack, associated hardware, and piston, as applicable, with new or serviceable parts, as applicable, in accordance with the service bulletin. Then, repeat the inspection required by paragraph (h) of this AD within 48 months, and, based on the findings during that repeat inspection, repeat the inspection and do corrective actions, as applicable, in accordance with paragraph (i) of this AD. Where the service bulletin specifies to return certain damaged parts to the parts manufacturer, this AD does not require that action.
As of the effective date of this AD, no person may install a lift spoiler jack having P/N P308-45-0002 or P308-45-0102 unless it has been inspected as required by this AD and found to be free of severe corrosion or other discrepancy.
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.
