Document ID: chunk:federal_register_of_legislation:F2006B03661:body:0:p2
Version: federal_register_of_legislation:F2006B03661
Segment Type: other
Provision Reference: 
Character Range: 3019–5178

114-380028-1, 114-380028-3, 114- 380028-5 or 114-380028-7 ventilation blower assembly is installed through the maintenance records check, carry out an inspection in accordance with SB 21- 3448 to determine the P/N of the installed ventilation blower assembly.

              4.         If, as a result of the Requirement 3 inspection, a ventilation blower assembly with P/ N 114-380028-1, 114-380028-3, 114-380028-5 or 114-380028-7 is found to be installed carry out Requirement 2.

              5. Ventilation blower assembly P/N 114-380028-1, 114-380028-3, 114-380028-5 or 114-380028-7 may not be installed on any aeroplane as a replacement part unless it has been modified in accordance with Requirement 2 and re-identified with a new P/N.

            Note 2: FAA AD 2004-01-13 Amdt 39-13427 refers.

            Compliance: For Requirement 1 - Within 800 hours time in service (TIS) after the effective date of this Directive.

            For Requirement 2 - Before further flight.

            For Requirement 3 - Within 800 hours TIS after the effective date of this Directive. For Requirement 4 - Before further flight.
            For Requirement 5 - As of the effective date of this Directive.

            This Airworthiness Directive becomes effective on 18 March 2004.

 Background: This Directive supersedes AD/BEECH 1900/21, which has been cancelled.
            AD/BEECH 1900/21 required the replacement of the bearings on the vent blower assemblies with improved design bearings and installation of a thermal protection device for the vent blowers. That Directive resulted from reports of vent blower assembly bearings seizing and locking the blower motor.

            This Directive requires the incorporation of further product improvement modifications on all affected vent blower assemblies. This Directive is the result of reports that vent blower assemblies modified in accordance with AD/BEECH 1900/21 are still malfunctioning.

 James Coyne
 Delegate of the Civil Aviation Safety Authority 4 February 2004

 The above AD is notified in the Commonwealth of Australia Gazette on 25 February 2004.