AD/F50/83 - Grimes Aerospace Passenger Service Units (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 39.1 (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 F50 (F27 Mk 50) Series Aeroplanes

AD/F50/83 Grimes Aerospace Passenger Service Units 6/2003

Applicability: Model F.27 Mk.050 and F.27 Mk.0502 aeroplanes, all serial numbers (S/N), with Grimes Aerospace Passenger Service Unit (PSU) Part Number (P/N) 10-1178-XX (XX may be any number) installed.

Requirement: 1. Unless previously modified in accordance with either Grimes Aerospace Company Service Bulletin (SB) 10-1178-33-0140 dated 15 October 1993 or Revision 1 dated 25 March 1996, modify the Grimes Aerospace PSUs P/N 10- 1178-XX (XX may be any number) in accordance with SB 10-1178-33-0040 Revis ion 1.

2. Apply sealant to the aft air-conditioning duct ends in accordance with the Accomplishment Instructions of Fokker Services SB F50-25-055 dated 17 March 2003.

Note 1: Aeroplane S/N 20306, 20307, 20309, 20310 and 20312 had the air- conditioning duct sealant modification incorporated before delivery.

Note 2: CAA(NL) BLA 2003-035 (A) refers.

Compliance: For Requirements 1 and 2 - Within three years after the effective date of this Directive.