AD/S-Puma/82 Hydraulic Hoist Cable (Cth)
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
Eurocopter AS 332 (Super Puma) Series Helicopters
| AD/S-PUMA/82 | Hydraulic Hoist Cable | 2/2009 DM |
Applicability: | AS 332 C, AS 332 C1, AS 332 L, AS 332 L1 and AS 332 L2 helicopters, all serial numbers, if equipped with a hoist strut assembly Part Number (P/N) 330A87-2345-00 to P/N 330A87-2345-06 inclusive, in combination with a tray mounted single or dual hoist. |
Requirement: | Action in accordance with the requirements of EASA AD 2008-0222-E, dated Note: Eurocopter AS332 Alert Service Bulletin (ASB) 25.02.08, dated |
Compliance: | As per requirement document. |
| This Airworthiness Directive becomes effective on 23 December 2008. | |
Background: | An incident has been reported of a hydraulic hoist cable jamming against the base of the supporting strut of a dual hoist tray installation. The jamming occurred during a rescue at sea, while the load was lifted and subject to large oscillations. The load was transferred to the backup electrical hoist and safely brought onboard. However, the hydraulic hoist cable jammed against the supporting strut which damaged the back-up electrical hoist power harness routed through that area, resulting in a short circuit that fused and ruptured the hydraulic hoist cable. This condition, if not corrected, could lead to further incidents of hoist cable jamming and consequent cable failure, possibly resulting in personal injuries and/or damage to the helicopter. |
| For the reason described above, this AD requires the implementation of a temporary limitation on hoist operation in case of cable jamming and requires a modification to the hoist installation to prevent the hoist cable jamming against the base of the supporting strut. |
David Punshon
Delegate of the Civil Aviation Safety Authority
22 December 2008
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