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AD/CL-600/114 - Landing Gear Alternate Extension System
Bombardier (Canadair) CL-600 (ChallengerBombardier (Canadair) CL-600 (Challenger) Series Aeroplanes
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Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes
| AD/CL-600/114 | Landing Gear Alternate Extension System | 8/2009 |
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| Applicability: | Bombardier Inc. Models CL-600-2C10 (Regional Jet Series 700 and 701) - Serial Numbers 10003 through 10216 CL-600-2D15 (Regional Jet Series 705) andCL-600-2D24 (Regional Jet Series 900) - Serial Numbers 15001 through 15039. |
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| Requirement: | 1. Bypass Valve - Clevis Replacement:Replace the existing clevis with a new clevis, P/N 2323H037, in accordance with Part A of the Accomplishment Instructions in Alert Service Bulletin (ASB) A670BA-32-022, Revision A, dated 1 May 2009, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada.Replacement of the existing clevis in accordance with Part A of the original issue, dated 8 November 2007, of ASB A670BA-32-022 also meets the intent of Requirement 1 of this AD.It is not necessary to replace the clevis if Part III of this AD has already been accomplished.2. Downlock Assist Valve - Clevis Replacement:Replace the existing clevis with a new clevis, Part Number 2323H037, in accordance with Part B of the Accomplishment Instructions in ASBA670BA-32-022, Revision A, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada.Replacement of the existing clevis in accordance with Part B of the original issue, dated 8 November 2007, of ASB A670BA-32-022 also meets the intent of Requirement 2 of this AD.It is not necessary to replace the clevis if Part III of this AD has already been accomplished.3. Installation of Support Brackets:Install new support brackets for the bypass valve and downlock assist valve in accordance with Part C of the Accomplishment Instructions in ASBA670BA-32-022, Revision A, or later revisions approved by the Chief, Continuing Airworthiness, Transport Canada. |
| Note: Transport Canada AD CF-2009-22 dated 14 May 2009 refers. | |
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| Compliance: | For Requirement 1:If, at the effective date of this AD, the bypass valve, Part Number (P/N) 53342-3, has accumulated 9,400 flight cycles (FC) or less, replace the clevis before the valve has accumulated 10,000 FC.If, at the effective date of this AD, the bypass valve has accumulated more than 9,400 FC, replace the clevis within 550 flight hours (FH) after the effective date of this AD.If it is not possible to determine the flight cycles accumulated by the bypass valve, replace the clevis within 550 FH after the effective date of this AD.For Requirement 2:If, at the effective date of this AD, the downlock assist valve, P/N 53341-5, has accumulated 9,400 FC or less, replace the clevis before the valve has accumulated 10,000 FC.If, at the effective date of this AD, the downlock assist valve has accumulated more than 9,400 FC, replace the clevis within 550 FH after the effective date of this AD.If it is not possible to determine the FC accumulated by the downlock assist valve, replace the clevis within 550 FH after the effective date of this AD.For Requirement 3:Within 4,500 FH after the effective date of this AD; orWithin 6000 FH after the accomplishment of Requirement 1 of this AD; orWithin 6000 flight cycles after the accomplishment of Requirement 2 of this AD,whichever comes first. |