Airworthiness Directive · Amendment 39-15066 · Bombardier Model DHC-8-400 Series Airplanes
Bombardier Model DHC-8-400 Series Airplanes
This AD applies to Bombardier Model DHC-8-400 series airplanes, certificated in any category; serial numbers (S/Ns) 4001 through 4107 inclusive.
The FAA is superseding an existing airworthiness directive (AD), which applies to certain Bombardier Model DHC-8-400 series airplanes. That AD currently requires inspecting the electrical connectors of the fire bottles for the forward and aft baggage compartments and for the auxiliary power unit (APU) and engine nacelles to determine if they are connected correctly, and doing related investigative and corrective actions if necessary. This new AD adds a requirement to install/modify lanyards, mounts, and clamps to the forward and aft baggage compartment, APU, and engine nacelle fire extinguishing systems. This new AD also requires revising the aircraft maintenance manual to incorporate installation and removal procedures for certain fire bottles and fire extinguisher cartridges. This new AD also adds two airplanes to the applicability. This AD results from reports of the electrical connectors for the fire bottles in the forward and aft baggage compartments, APU, and engine nacelle being cross-connected. We are issuing this AD to detect and correct cross- connection of the fire bottles and to prevent cross-connection, which could result in failure of the fire bottles to discharge and consequent inability to extinguish a fire in the affected areas.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
For airplanes having S/Ns 4001 through 4105 inclusive: Within 14 days after July 5, 2005 (the effective date of AD 2005-12-17), inspect the electrical connectors of the fire bottles for the forward and aft baggage compartments and for the APU and engine nacelles to determine if they are connected correctly; and, before further flight, do the related investigative and corrective actions, as applicable; by doing all of the applicable actions specified in the Accomplishment Instructions of Bombardier Alert Service Bulletin A84-26-06, dated May 12, 2005; or Revision ‘A,' dated June 6, 2005. Although the service bulletins specify to submit certain information to the manufacturer, this AD does not include that requirement.
For all airplanes: Within 5,000 flight hours after the effective date of this AD, install/modify lanyards, mounts, and clamps to the forward and aft baggage compartment, APU, and engine nacelle fire extinguishing systems by doing all the actions specified in the Accomplishment Instructions of Bombardier Service Bulletin 84-26-07, Revision ‘B,' dated November 1, 2006.
For airplanes having S/Ns 4001 through 4105 inclusive: Within 30 days after the effective date of this AD, incorporate the information in the page blocks of Bombardier Dash 8 Series 400 Aircraft Maintenance Manual (AMM), Product Support Manual (PSM) 1-84-2, Revision 22, dated June 5, 2006, specified in paragraphs (h)(1), (h)(2), (h)(3), (h)(4), (h)(5), (h)(6), and (h)(7) of this AD, into the FAA-approved maintenance program to specify an installation and removal of nacelle fire bottles, an installation of aft high-rate fire bottles, an installation of forward high-rate fire bottles, an installation and removal of low-rate fire bottles, an installation of APU fire bottles, an installation and removal of low-rate fire extinguisher cartridges, and an installation and removal of nacelle fire extinguisher cartridges, in accordance with a method approved by either the Manager, New York Aircraft Certification Office (ACO), FAA; or Transport Canada Civil Aviation (or its delegated agent). The page blocks of the Bombardier Dash 8 Series 400 AMM specified in paragraphs (h)(1), (h)(2), (h)(3), (h)(4), (h)(5), (h)(6), and (h)(7) of this AD, are one approved method for the actions required by this paragraph.
(1) Chapter 26-21-01, Page Block 401, dated December 5, 2005.
(2) Chapter 26-21-06, Page Block 401, dated December 5, 2005.
(3) Chapter 26-22-02, Page Block 401, dated December 5, 2005.
(4) Chapter 26-22-03, Page Block 401, dated December 5, 2005.
(5) Chapter 26-22-11, Page Block 401, dated December 5, 2005.
(6) Chapter 26-22-16, Page Block 401, dated December 5, 2005.
(7) Chapter 26-23-01, Page Block 401, dated December 5, 2005.
(i) Actions accomplished before the effective date of this AD in accordance with Bombardier Service Bulletin 84-26-07, dated June 15, 2005; and Revision ‘A,' dated February 21, 2006; are considered acceptable for compliance with the corresponding action specified in paragraph (g) of this AD, provided the intended restriction of the connectors was done as specified in Bombardier Service Bulletin 84-26-07, Revision ‘B,' dated November 1, 2006.
