1AD/PHZL/46 Amdt 2 - Propeller De-Icer System Slip Ring - Inspection

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Propellers - Variable Pitch - Hartzell

AD/PHZL/46

Amdt 2

Propeller De-Icer System Slip Ring - Inspection 4/90

Applicability: All propeller models HC-B3TN-3C or -3D equipped with propeller de-icer system using spinner bulkhead P/N D-3472 or D-3474, and fitted to Embraer EMB-110 series aircraft.

Requirement: Action in accordance with Embraer Service Bulletin No 110-030-0006 Revision 2.

Note: Brazilian AD 79-12-02 refers to SB 110-030-0006 initial issue.

Compliance: 1. Inspect within 50 hours time in service after 28 November 1979.

2. Repeat inspection at periods not exceeding 50 hours time in service, for an additional 5 inspections.

3. Thereafter, inspect at periods not exceeding 300 hours time in service.

4. Inspection cycle to be repeated for replacement propellers.

Background: The aircraft manufacturer advises of the need to inspect for cracking of the resin that attaches the de-icer slip ring. The manufacturer has further revised his Service Bulletin which increased the 200 hour inspection to 300 hours.