Airworthiness Directive · Amendment 39-19825 · Fire protection
De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
This AD applies to De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Model DHC-8-400, -401, and -402 airplanes, certificated in any category, serial numbers 4001 and 4003 and subsequent.
The FAA is adopting a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited Model DHC-8-400 series airplanes. This AD was prompted by a report of a quality escape in the manufacturing of advanced pneumatic detector (APD) switches, which consisted of the presence of contamination on the switch contact pin. This AD requires identification and testing, and reidentification or replacement if necessary, of affected APDs. The FAA is issuing this AD to address the unsafe condition on these products.
For purposes of this AD, an affected APD is manufactured by Kidde Aerospace and Defense (part of United Technologies Aerospace Systems (UTAS)) and has a part number and serial number identified in paragraphs (g)(1) through (10) of this AD.
(1) Part number 10-1096 (all serial numbers).
(2) Part number 10-1096-01 (all serial numbers).
(3) Part number 10-1096-02 (serial numbers before AEM9907).
(4) Part number 10-1097 (all serial numbers).
(5) Part number 10-1097-01 (all serial numbers).
(6) Part number 10-1097-02 (serial numbers before 17-0005).
(7) Part number 10-1098 (all serial numbers).
(8) Part number 10-1098-01 (serial numbers before 17-0110).
(9) Part number 10-1099 (all serial numbers).
(10) Part number 10-1099-01 (serial numbers before 17-0009).
Within 8,000 flight hours or 48 months, whichever occurs first after the effective date of this AD: Do the applicable actions specified in paragraph (h)(1) and (2) of this AD, in accordance with paragraph 3.B., “Procedure,” of the Accomplishment Instructions of Bombardier Service Bulletin 84-26-19, Revision `A,' dated February 11, 2019.
(1) Determine whether any affected APD is installed on the engine nacelles or auxiliary power unit (APU) compartment.
(2) Do the on-aircraft test of all affected APDs.
(i) For any APD that passes the test: Before further flight, reidentify the APD.
(ii) For any APD that fails the test: Before further flight, replace the APD with an unaffected APD, or one provided by Kidde Aerospace and Defense that has been successfully tested and reidentified.
For any APD that fails the test specified in paragraph (h)(2) of this AD: Return the APD at the applicable time specified in paragraph (i)(1) or (2) of this AD to Kidde Aerospace & Defense, 4200 Airport Dr NW, Building B, Wilson, NC 27896-8630, Attention Keith Fail, Supervisor, Service Center.
(1) If the test was done on or after the effective date of this AD: Send the APD within 30 days after completion of the test.
(2) If the test was done before the effective date of this AD: Send the APD within 30 days after the effective date of this AD.
As of the effective date of this AD, no person may install an affected APD, unless the APD has been successfully tested and reidentified in accordance with Bombardier Service Bulletin 84-26-19, dated October 24, 2018; or Revision `A,' dated February 11, 2019.
