AD/R44/14 - Wire Harness and Fuel Line Chafing (Cth)

Robinson R44 Series Helicopters

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 CAR 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.

AD/R44/14 Wire Harness and Fuel Line Chafing 6/2000 DM

Applicability: Model R44 helicopters, serial numbers 0002 through 0462.

Requirement: 1. Accomplish the following actions to prevent contact between the wire harness and the fuel line assembly:

1. Remove the cover, part number (P/N) C474-1, from between the rear seatbacks.

b. Inspect the wire harness, P/N C059, and the fuel line assembly, P/N C726-2, above the fuel shutoff valve for contact. If the wire harness contacts the fuel line assembly, inspect for chafing.

c. If chafing has occurred between the wire harness and the fuel line assembly, replace the fuel line with an airworthy fuel line assembly. Torque the fuel line nuts to 12.4-14.7 Nm (110-130 in-lbs). Verify that clearance exists between the fuel line assembly and the wire harness.

d. Install a 75 mm (3 in) section of spiral wrap tubing, P/N B161-8, on the fuel line assembly as shown in Figure 1. Push the spiral wrap tubing down until it is against the fuel line fitting.

AL 6/2000 COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES