Airworthiness Directive · Amendment 39-18224 · Fire protection
BAE Systems (Operations) Limited Airplanes
This AD applies to all BAE Systems (Operations) Limited Model ATP airplanes, certificated in any category, all manufacturer serial numbers.
We are adopting a new airworthiness directive (AD) for all BAE Systems (Operations) Limited Model ATP airplanes. This AD requires a one-time inspection for solder deposited on the frangible plug of certain engine and auxiliary power unit (APU) fire extinguishers. This AD was prompted by reports of a fire extinguisher that failed to discharge due to solder deposited on the frangible plug of the fire extinguisher. We are issuing this AD to detect and correct solder deposited on the frangible plug of the fire extinguisher, which could result in failure of the fire extinguisher to discharge, and consequent inability to put out a fire in an engine or in the APU.
(1) For airplanes equipped with Kidde Graviner fire extinguishers having part number (P/N) 57183 (all dash numbers): Within 12 months after the effective date of this AD, inspect each affected fire extinguisher for solder deposited on the frangible plug of the fire extinguisher, in accordance with the Accomplishment Instructions of BAE Systems (Operations) Limited Service Bulletin ATP-26-016, dated October 4, 2011, and Kidde Graviner Service Bulletin 26-080, Revision 1, dated July 27, 2011. If any solder deposit is detected, replace the fire extinguisher with a serviceable fire extinguisher before further flight, in accordance with the Accomplishment Instructions of BAE Systems (Operations) Limited Service Bulletin ATP-26-016, dated October 4, 2011.
(2) Fire extinguishers that meet any condition identified in paragraph (g)(2)(i), (g)(2)(ii), or (g)(2)(iii) of this AD are compliant with the requirements of paragraph (g)(1) of this AD.
(i) Fire extinguishers that have been overhauled by Kidde Graviner or Hugen.
(ii) Fire extinguishers that have been overhauled as specified in Kidde Graviner Service Information Letter (SIL) 01-10, dated July 29, 2010.
(iii) Fire extinguishers that have been overhauled as specified in Kidde Graviner Component Maintenance Manual with Illustrated Parts List 26-21-52, Automatic Extinguishers with Steel Containers Part Numbers 57133, 57135, 57145, and 57183 Series, Revision 17, dated June 13, 2012.
For the purpose of this AD, an overhaul is considered to include replacement of the operating head. Replacement of the pressure relief plug assembly only is not considered an overhaul.
As of the effective date of this AD, do not install a Kidde Graviner fire extinguisher having P/N 57183 (all dash numbers) on any airplane, unless the fire extinguisher meets any condition specified in paragraph (i)(1), (i)(2), (i)(3), (i)(4), or (i)(5) of this AD.
(1) The fire extinguisher is new.
(2) The fire extinguisher has passed the inspection as specified in the instructions of Kidde Graviner Service Bulletin 26-080, Revision 1, dated July 27, 2011.
(3) The fire extinguisher has been overhauled by Kidde Graviner or Hugen.
(4) The fire extinguisher has been overhauled as specified in the instructions of Kidde Graviner SIL 01-10, dated July 29, 2010.
(5) The fire extinguisher has been overhauled in accordance with Kidde Graviner Component Maintenance Manual with Illustrated Parts List 26-21-52, Automatic Extinguishers with Steel Containers Part Numbers 57133, 57135, 57145, and 57183 Series, Revision 17, dated June 13, 2012.
