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AD/BEECH 55/62 Amdt 6 - Wing Main Spar Centre Section
Beechcraft 55, 58 and 95-55 (Baron) SeriBeechcraft 55, 58 and 95-55 (Baron) Series Aeroplanes
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Beechcraft 55, 58 and 95-55 (Baron) Series Aeroplanes
| AD/BEECH 55/62 Amdt 6 | Wing Main Spar Centre Section | 13/2008 |
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| Applicability: | As detailed in the requirements document. |
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| Requirement: | Inspect the wing forward spar carry through structure forward and aft frames, in accordance with Beechcraft Service Bulletin No 2269 Rev 1, dated March 1990 or later FAA approved revision.Note: FAA AD 90-08-14 Amendment 39-6563 refers. |
| Compliance: | Within 100 hours time in service after 30 November 1989, or prior to the accumulation of 1500 hours total time in service, whichever occurs later. Where no cracks are found, repeat the inspections at intervals not to exceed 500 hours time in service. Where cracks are found, repeat the inspections at intervals as detailed in the Requirement Document. Crack limits must not be exceeded.Specific locations repaired or reinforced by the installation of the applicable Beech P/N 58-4008 kit or other approved scheme, need not be inspected before 1500 hours time in service after installation of the repair, however affected areas adjacent to repair doublers remain subject to the above compliance. Aircraft inspected in accordance with the previous issue of this Directive, shall be considered to have been inspected in accordance with this amendment. |
| This Amendment becomes effective on 18 December 2008. | |
| Background: | There have been numerous reports of cracking at various locations in the wing carry through structure. This problem was first found in Australia in 1981. The cracking is caused by fatigue in the corners of the fuselage frame webs around and between huckbolts and in area where stringers are attached. To date there have been no reports of cracks having progressed to failure, but uncorrected this condition could lead to eventual catastrophic failure.Amendment 5 was issued to allow the use of later FAA approved revisions to Beechcraft Service Bulletin No. 2269. |
| Amendment 6 has been issued to amend reference to the FAA AD. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
29 October 2008