Airworthiness directives › 2017-25-13
AD 2017-25-13 Airworthiness Directives; Airbus Airplanes
Models named: A330-201, -202, -203, -223, -223F, -243, -243F, -301, -302, -303. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Airbus Model A330-201, -202, -203, -223, -223F, -243, -243F, -301, -302, -303, -321, -322, -323, -341, -342 and -343 airplanes; and Airbus Model A340-211, -212, -213, -311, -312, -313, -541, and -642 airplanes; certificated in any category, all manufacturer's serial numbers.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Before exceeding the threshold in Table 1 to paragraph (g) of this AD, as applicable, or within 3 months after the effective date of this AD, whichever occurs later; and thereafter at intervals not to exceed the inspection interval values defined in Table 1 to paragraph (g) of this AD; accomplish a detailed visual inspection for discrepancies of the THSA upper attachments and no-back housing, in accordance with the Accomplishment Instructions of Airbus Service Bulletin A330-27-3218, Revision 01, A340-27-4203, Revision 01, or A340-27-5067, Revision 01, all dated December 5, 2016, as applicable. Where the “Threshold” column of table 1 to paragraph (g) of this AD specifies compliance times in “FH” (flight hours) or “FC” (flight cycles), those compliance times are flight hours or flight cycles since the first flight of the airplane, or since the last accomplishment of Airbus Model A330 or A340 Maintenance Review Board Report task 27.40.00/07, or since the last detailed visual inspection of the THSA done in accordance with the Accomplishment Instructions of Airbus Service Bulletin A330-27-3218, Revision 00, A340-27-4203, Revision 00, or A340-27-5067, Revision 00, all dated July 1, 2016, as applicable. Table 1 to Paragraph ( g ) of This AD—THSA Upper Attachments/No-Back Housing Inspections Affected airplanes Compliance times (whichever occurs first, flight hours (FH) or flight cycles (FC)) Threshold Inspection interval (not to exceed) A330, A340-200 and A340-300 Before 4,000 FH or 1,000 FC 4,000 FH or 1,000 FC A340-500 and A340-600 Before 4,000 FH or 800 FC 4,000 FH or 800 FC
Unsafe condition
This AD was prompted by a report that the trimmable horizontal stabilizer actuator (THSA) might not function as intended after failure of the primary load path. We are issuing this AD to detect and correct discrepancies of the THSA upper attachments and no-back housing, which could lead to THSA upper attachment failure and consequent disconnection of the THSA from the airplane structure, possibly resulting in loss of control of the airplane.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1