Airworthiness directives › 2012-12-13
AD 2012-12-13 Airworthiness Directives; BAE Systems (Operations) Limited Airplanes
Models named: BAe 146-100A, -200A, -300A, Avro 146-RJ70A, 146-RJ85A, 146-RJ100A. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to BAE Systems (Operations) Limited Model BAe 146-100A, -200A, and -300A airplanes, and Model Avro 146-RJ70A, 146-RJ85A, and 146-RJ100A airplanes; certificated in any category; all serial numbers, on which modification HCM30480A, HCM30480B, HCM30480C, HCM30480D, HCM30480E, or HCM30480F are embodied.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Required actions
Within 3 months after the effective date of this AD, do the actions specified in paragraphs (g)(1), (g)(2), (g)(3), (g)(4), (g)(5), and (g)(6) of this AD. (1) Do a general visual inspection of baggage bay fire bottle WB8 having part number (P/N) 473997-1 for correct connection of the squib connectors identified in paragraphs (g)(1)(i) and (g)(1)(ii) of this AD, in accordance with paragraph 2.C.(3) of the Accomplishment Instructions of BAE Systems (Operations) Limited Modification Service Bulletin SB.26-077-36250A.B, Revision 4, dated January 7, 2011. If any items are found improperly connected, before further flight, reconnect the squib connectors properly, in accordance with paragraph 2.C.(3) of the Accomplishment Instructions of BAE Systems (Operations) Limited Modification Service Bulletin SB.26-077-36250A.B, Revision 4, dated January 7, 2011. (i) Squib connector WB8P1 (S1446-004A) and cartridge P/N 446307. (ii) Squib connector WB8P2 (S1446-004D) and squib P/N 446290. (2) Do a general visual inspection of the length of the wiring loom at the squib connector WB8P2 for excessive length that could cause the connector to become cross-connected with squib connector WB8P1, in accordance with paragraph 2.C.(4) of the Accomplishment Instructions of BAE Systems (Operations) Limited Modification Service Bulletin SB.26-077-36250A.B, Revision 4, dated January 7, 2011. If excessive length is found, before further flight, modify the loom, in accordance with paragraph 2.C.(4) of the Accomplishment Instructions of BAE Systems (Operations) Limited Modification Service Bulletin SB.26-077-36250A.B, Revision 4, dated January 7, 2011. (3) Do a general visual inspection of baggage bay fire bottle WB7 having P/N 473996-1 for correct connection of squib connectors identified in paragraphs (g)(3)(i) and (g)(3)(ii) of this AD, in accordance with paragraph 2.C.(5) of the Accomplishment Instructions of BAE Systems (Operations) Limited Modification Service Bulletin SB.26-077-36250A.B, Revision 4, dated January 7, 2011. If any items are found improperly connected, before further flight, reconnect the squib connectors properly, in accordance with paragraph 2.C.(5) of the Accomplishment Instructions of BAE Systems (Operations) Limited Modification Service Bulletin SB.26-077-36250A.B, Revision 4, dated January 7, 2011. (i) Squib connector WB7P1 (S1446-004A) and cartridge P/N 446307. (ii) Squib connector WB7P2 (S1446-004D) and squib P/N 446290. (4) Modify the wiring loom to squib connector WB7P2, in accordance with paragraphs 2.C.(6)(a) and 2.C.(6)(c) of the Accomplishment Instructions of BAE Systems (Operations) Limited Modification Service Bulletin SB.26-077-36250A.B, Revision 4, dated January 7, 2011. (5) Modify the wiring loom to squib connector WB7P1, in accordance with paragraph 2.C.(6)(b) of the Accomplishment Instructions of BAE Systems (Operations) Limited Modification Service Bulletin SB.26-077-36250A.B, Revision 4, dated January 7, 2011. (6) Install modification HCM36250B, in accordance with paragraph 2.C.(7) of the Accomplishment Instructions of BAE Systems (Operations) Limited Modification Service Bulletin SB.26-077-36250A.B, Revision 4, dated January 7, 2011. Note 1 to paragraph (g) of this AD: Guidance for test and close-up procedures can be found in paragraphs 2.D. and 2.E. of the Accomplishment Instructions of BAE Systems (Operations) Limited Modification Service Bulletin SB.26-077-36250A.B, Revision 4, dated January 7, 2011.
Unsafe condition
This AD was prompted by reports of baggage bay fire bottles that can be misassembled such that two squib electrical connectors can be cross-connected. We are issuing this AD to detect and correct excessive wiring loom length and improper connection of the squib connecters, which in conjunction with a fire in one of the baggage bays, could result in the fire extinguishing agent being discharged into a wrong compartment and consequent damage to the airplane.
Affected ADs
None.
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