AD/F100/85 Amdt 1 - Flight Controls - Elevator Booster Control Unit (Cth)

AIRWORTHINESS DIRECTIVE On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/F100/85 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.

Fokker F100 (F28 Mk 100) Series Aeroplanes AD/F100/85 Amdt 1 Flight Controls - Elevator Booster Control Unit 5/2009

Applicability: F28 Mark 0070 and Mark 0100 aircraft, all serial numbers. Requirement: 1. For aircraft equipped with Elevator Booster Control Unit (BCU) part number (P/N) 23400-3B or P/N 23400-7:

Perform a one-time inspection of the Elevator BCU as defined in Part 1 of the Accomplishment Instructions of Fokker Service Bulletin SBF100-27-088 dated 4 June 2007.

2. For aircraft equipped with BCU P/N 23400-3 or P/N 23400-5:

Perform a one-time inspection of the Elevator BCU as defined in Part 1 of the Accomplishment Instructions of Fokker Service Bulletin SBF100-27-088.

3. Replace the Elevator BCU with a P/N 23400-3B or P/N 23400-7 unit that has been modified in accordance with Goodrich CSB 23400-27-27.

4. Replace all remaining unmodified Elevator BCU P/N 23400-3B and P/N 23400-7 with units modified in accordance with Goodrich CSB 23400-27-27 and Part 2 of the Accomplishment Instructions of Fokker Service Bulletin SBF100-27-088.