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AD/PC-12/48 - Centre Fuselage Frame 21
Pilatus PC-12 Series AeroplanesPilatus PC-12 Series Aeroplanes
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Pilatus PC-12 Series Aeroplanes
| AD/PC-12/48 | Centre Fuselage Frame 21 | 6/2006 |
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| Applicability: | Model PC-12 and PC-12/45 aircraft, manufacturer serial numbers 101 through 617. |
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| Requirement: | 1. Perform an inspection of Centre Fuselage Frame 21 (FR21) in the area of the outer sidewall frame attachment lug forward and aft side faces, left and right, to determine if there is any drill damage.If damage is detected during the Requirement 1 inspection that is less than 0.1 mm (0.004-inch), before further flight, repair the damage in accordance with Pilatus PC-12 Service Bulletin No. 53-004.If damage is detected during the Requirement 1 inspection that is more than 0.1 mm (0.004-inch), before further flight, contact Pilatus Aircraft Ltd. for technical advice.2. Perform an inspection of FR21 in the area of the top surface of the wing upper-attachment lugs, left and right, to determine if there is any drill damage.If damage is detected during the Requirement 2 inspection that is less than 0.1 mm (0.004-inch), before further flight, repair the damage in accordance with Pilatus PC-12 Service Bulletin No. 53-004.If damage is detected during the Requirement 2 inspection that is more than 0.1 mm (0.004-inch), before further flight, contact Pilatus Aircraft Ltd. for technical advice.Note: FOCA AD HB-2006-223 refers. |
| Compliance: | Within 12 months after 8 June 2006. |
| This Airworthiness Directive becomes effective on 8 June 2006. |
| Background: | The Federal Office for Civil Aviation received reports of drill mark damage on some Centre Fuselage Frame 21 lug fittings on the production line, and during a number of mid life wing lug inspections. The damage to the lug fittings is thought to have occurred during assembly of the aircraft. Depending on the size and location of damage, the fatigue life of the wing attachment lugs may be affected. |
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Richard Castles
Delegate of the Civil Aviation Safety Authority
19 April 2006