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AD/A320/197 - Landing Gear Gravity Free Fall Control Mechanism
Airbus Industrie A319, A320 and A321 SerAirbus Industrie A319, A320 and A321 Series Aeroplanes
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Airbus Industrie A319, A320 and A321 Series Aeroplanes
| AD/A320/197 | Landing Gear Gravity FreeFall Control Mechanism | 2/2007 |
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| Applicability: | Airbus Industrie A319 series aircraft manufacturer serial numbers (MSN) 578 through 625 inclusive; andA321-100 series aircraft MSN 385 through 620 inclusive. |
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| Requirement: | Carry out the following actions in accordance with Airbus Industrie All-Operator-Telex (AOT) 32-15 dated 1 July 1997 or later DGAC approved revisions.i) Adjust the landing gear unlocked-stop screw of the free fall control mechanism at 3 turns.ii) Replace the 2 shear pins in the reduction gear box as well as the 2 shear pins in the pulley assembly.iii) Inspect the cut-out valve.Replace it if damaged and with aircraft on jacks, perform a functional test of the normal extension/retraction of the landing gear, and a functional test of the free fall extension system.iv) Perform an operational test of the gear uplock and door uplock mechanical control (aircraft on wheels).Note: French DGAC AD 97-177-101(B) dated 13 Aug 1997 refers. |
| Compliance: | Unless already accomplished, within 50 flight hours or one month after the effective date of this AD, whichever occurs earlier. |
| This Airworthiness Directive becomes effective on 15 February 2007. | |
| Background: | An incorrect rigging of the landing gear free fall control mechanism became evident in production. |
| In case of landing gear extension by gravity, this incorrect rigging could damage the cut-out valve and the four shear pins installed on the landing gear free fall control mechanism and could result in non-extension of one or more landing gears. |
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James Coyne
Delegate of the Civil Aviation Safety Authority
5 January 2007