AD/BELL 407/9 Amdt 3 - Tailboom Skin (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/BELL 407/9 Amdt 2 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.

Bell Helicopter Textron Canada (BHTC) 407 Series Helicopters AD/BELL 407/9 Amdt 3 Tailboom Skin 4/2008 DM

Applicability: Model 407 helicopters with tailbooms part number 407-030-801-107 and 407-530-014-101/-103 installed. Requirement: Part I - Verification

a. Verify whether tailboom part number 407-030-801-107 or 407-530-014-101/-103 is installed on the helicopter.

b. Enter in the helicopter technical records the appropriate tailboom part number as identified above.

c. If the tailboom identified is not affected by this Directive, annotate the helicopter technical records accordingly.

Part II - Surface preparation and initial inspection

Prepare the tailboom surface for "Daily Visual Check" in accordance with Part II, paragraph (1), items (a) to (e) of BHTC Alert Service Bulletin (ASB) 407-07-80 original issue, or later Transport Canada approved revision.

Inspect both areas for cracks (indicated as "Daily check area" on Figure 2 in ASB 407-07-80) using a 10x magnifying glass.