Airworthiness directives › 2014-26-05
AD 2014-26-05 Airworthiness Directives; Beechcraft Corporation Airplanes
Models named: G58. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Beechcraft Corporation Model G58 airplanes, serial numbers (SNs) TH-2335 through TH-2378, certificated in any category.
Compliance
Comply with this AD within the compliance times specified in paragraphs (g) and (h), including all subparagraphs, unless already done. All of the actions in paragraphs (g) and (h) must be completed for compliance with this AD. The actions of Beechcraft Mandatory Service Bulletin SB 28-4127, dated June 2013, and Beechcraft Mandatory Service Bulletin SB 28-4131, dated November 2013, have numerous overlapping tasks. Instead of completing the required actions in paragraph (g) and paragraph (h) separately, you may complete the actions of both paragraphs concurrently to avoid repeating the same tasks unnecessarily. We recommend reviewing Appendices 1 through 3 of this AD for general guidance and suggestions for task ordering to assist you in not repeating tasks unnecessarily.
Required actions
(1) For Model G58 airplanes, S/Ns TH-2356 through TH-2378: Within the next 100 hours time-in-service (TIS) after [February 9, 2015 (the effective date of this AD) or within the next 12 months after February 9, 2015 (the effective date of this AD), whichever occurs first, inspect the fuel cells (left hand (LH) inboard, outboard, and center; and right hand (RH) inboard, outboard, and center) following Beechcraft Mandatory Service Bulletin SB 28-4131, dated November 2013. If any fuel cell is Beechcraft Corporation P/N 60-921046-5, 60-921046-6, 002-920034-9, 002-920034-10, 58-380003-13, or 58-380003-14; or Floats and Fuel Cells, Inc. (FFC) parts manufacturer approval (PMA) P/N B-2503-9/-10; B-2034-3/-4; or B-2646-3/-4, before further flight, replace the fuel cell(s) with Beechcraft Corporation P/N 60-921046-1, 60-921046-2, 002-920034-1, 002-920034-2, 58-380003-5, or 58-380003-6, as applicable, following Beechcraft Mandatory Service Bulletin SB 28-4131, dated November 2013. (2) For Model G58 airplanes, S/Ns TH-2335 through TH-2378: As of February 9, 2015 (the effective date of this AD), do not install the following P/Ns: (i) Beechcraft Corporation P/N 60-921046-5, 60-921046-6, 002-920034-9, 002-920034-10, 58-380003-13, or 58-380003-14; or (ii) FFC PMA fuel cells P/N B-2503-9/-10, B-2034-3/-4, or B-2646-3/-4.
Unsafe condition
This AD was prompted by reports of fuel leaks due to fuel cells that did not properly fit in Model G58 airplanes. We are issuing this AD to detect and correct improperly fitting fuel cells. We are also issuing this AD to correct left and right fuel system installations and set correct torque on fuel system fittings for all affected airplanes, which if not corrected, could result in significant fuel leakage. This could lead to an imbalance condition, which may affect airplane controllability, and/or could lead to an airplane fire.
Affected ADs
None.
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