AD/SMA/4 Air Inlet Manifold Hose Clamps (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.

SMA Piston Engines

AD/SMA/4 Air Inlet Manifold Hose Clamps 7/2008 TX

Applicability:

Cessna Model 182M, 182N, 182P, 182Q, 182R, and (Reims-manufactured) F182P and F182Q aircraft, incorporating STC EASA.A.S.00774 (SMA SR305-230 engine installation).

Requirement:

1.    Inspect the air inlet manifold hoses and hose clamps in accordance with SMA SB-C182-75-002 Revision 2 or later NAA approved revision.

Previous accomplishment of SMA SB-C182-75-002 original issue or Revision 1 does not constitute compliance with the requirements of this AD.

2.    If, during the inspection as detailed in Requirement 1 of this AD, any discrepancies or damaged parts are found, action in accordance with SMA SB No. C182-75-002 Revision 2 or later NAA approved revision and replace any damaged clamps and hoses with airworthy parts.

Replacement of parts does not constitute terminating action for the inspection detailed in Requirement 1 of this AD.

Note:  EASA AD 2008-0078 dated 24 April 2008 refers.

Compliance:

For Requirement 1:  Within 14 days after the effective date of this AD or after modification of the aircraft in accordance with STC EASA.A.S. 00774, whichever occurs later, and thereafter at intervals not to exceed 50 Flight Hours.

For Requirement 2:  Before further flight.

This Airworthiness Directive becomes effective on 13 May 2008.

Background: Hose disconnections on the air inlet manifold circuit have been reported to SMA.  This condition, if not corrected, could result in a loss of turbo boost and significant loss of engine power, which is not compatible with maintaining constant altitude flight.  For this reason, as a temporary measure pending the approval and availability of a final modification, this Directive requires repetitive inspections of the air inlet manifold hoses and hose clamps and follow-on corrective action.

James Coyne
Delegate of the Civil Aviation Safety Authority

7 May 2008