Document ID: chunk:federal_register_of_legislation:F2005L02381:body:0:p1
Version: federal_register_of_legislation:F2005L02381
Segment Type: other
Provision Reference: 
Character Range: 0–3091

AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/FSM/29 Amdt 3 and issues the following 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.

Fuel Supply and Metering Equipment
AD/FSM/29 Amdt 4  Precision Airmotive Corporation Carburettors  10/2005

Applicability:  Precision Airmotive Corporation (PAC, formerly Facet Aerospace Products Corporation and Marvel-Schebler Corporation) Model MA-3, MA-3A, MA-3PA, MA-3SPA, MA-4SPA carburettors installed on but not limited to Textron Lycoming O-235, O-290, and O-320 series engines, and Teledyne Continental Motors (TCM) A-65, A-75, C-75, C-85, C-90, C-115, C-125, C-145, O-200, and O-300 series engines.
Requirement:    Model MA-3A, MA-3PA, MA-3SPA, and MA4-SPA carburettors:

                   1. Inspect the carburettor to determine if a two-piece venturi is installed. If a two-piece venturi is installed, inspect the carburettor to determine if the primary venturi is loose or missing.

                   2. If a two-piece venturi is installed and the primary venturi is found loose or missing, repair the carburettor by installing a serviceable two-piece venturi or by installing a one-piece venturi as per provisions of Precision Airmotive Service Bulletin (SB) No. MSA-2, Revision 1, 2, 3 or later FAA approved revision.

                Note 1:  Carburettors that have the letter "V" stamped or etched on the lower portion of the data plate, or that have a black, yellow, or blue data plate showing the Precision Airmotive Corporation (PAC) name and logo, or that have a black Facet Aerospace Products data plate with a serial number beginning with 750, are already equipped with a one-piece venturi and no further action is necessary provided the engine does not subsequently run rough or experience power loss.

                   3. IF the carburettor is fitted with a one-piece venturi AND the engine runs rough or experiences power loss AND providing the rough running engine or power loss can be traced to the carburettor venturi or fuel nozzle THEN accomplish either of the following:

                     3A Install a carburettor containing a two-piece venturi and resume the inspections as per requirement 1 and 2 of this AD; OR

                  3B Modify the carburettor in accordance with paragraphs 3B-(a), 3B-(b), or 3B-(c) of this Directive, as applicable:

                     (a) For PAC Model MA-3SPA series carburettors with part numbers (P/N) 10-4894 or 10-4115-1, installed on TCM Model O-200A series engines modified by installing a