AD/B737/348 - AN-26 Insulation Blankets (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 39.001(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.

Boeing 737 Series Aeroplanes AD/B737/348 AN-26 Insulation Blankets 1/2009

Applicability: Boeing 737-200, 737-200C, 737-300, and 737-400 series aircraft, serial numbers as defined in Boeing Special Attention Service Bulletin 737-25-1572. Requirement: 1. Either:

a. Remove all insulation blankets from the pressurized areas of the fuselage and install new insulation blankets using a method approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA. The new insulation blankets must comply with 14 Code of Federal Regulations (CFR) 25.856(a). The areas where the affected insulation blankets are installed include, but are not limited to, the following areas:

(i) Crown area of the airplane;

(ii) Areas behind flight deck panels and circuit breaker panels;

(iii) Areas behind sidewalls, lavatories, closets, and galleys;

(iv) Cargo compartment areas;

(v) Air ducting;

(vi) Waste and water tubing; and

(vii) Areas attached to the underside of floor panels. ; or