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AD/CL-600/105 - Engine Throttle Control Gearbox
Bombardier (Canadair) CL-600 (ChallengerBombardier (Canadair) CL-600 (Challenger) Series Aeroplanes
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Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes
| AD/CL-600/105 | Engine Throttle Control Gearbox | 1/2009 |
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| Applicability: | Bombardier CL-600-2A12 (CL601) and CL-600-2B16 (601-3A, 601-3R & CL604) Aircraft. |
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| Requirement: | Revise the Transport Canada approved Maintenance Schedule as per the following:a) Incorporate Task 76-10-00-101 in Section 5-10-30 of PSP 601-5 TLMC, as introduced by TR 5-236 for CL601 variant.b) Incorporate Task 76-10-00-101 in Section 5-10-30 of PSP 601A-5 TLMC, as introduced by TR 5-236 for CL601-3A & 3R variants.c) Incorporate Task 76-11-00-101 in Section 5-10-40 of CL604 TLMC, as introduced by TR 5-2-40 for CL604 variant.Previous compliance with superseded TLMC TR 5-224 for variant CL 601, andTR 5-2-31 for variant CL604, satisfies the intention of this AD.Note: Transport Canada AD CF-2008-32R2 dated 17 November 2008 refers. |
| Compliance: | Within 30 days after the effective date of this AD.Initial compliance with the above-mentioned new TLMC tasks should be carried out in accordance with the Phase-in schedule as detailed in the applicable TRs 5-236 and TR 5-2-40. |
| This Airworthiness Directive becomes effective on 15 January 2009. | |
| Background: | There have been various reported incidents of throttle jam and engine shutdowns, caused by premature wear of the rack and pinion mechanism of part number (P/N) 2100140-005 and -007 Engine Throttle Control Gearbox (ETCG), installed on Bombardier CL-601 and 604 aircraft.Bombardier issued service bulletins (SB) 601-0583 (CL601/601-3A,-3R) and604-76-004 (CL 604), introducing periodic inspection of the affected ETCG rack and pinion mechanisms for wear. |
| Subject inspection requirement tasks have now been incorporated into the applicable CL601 and CL604 Time Limits Maintenance Checks (TLMCs), through Temporary Revisions (TR), TR 5-236 (for CL601), TR 5-236 (for CL601-3A & -3R) andTR 5-2-40 (for CL604). |
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James Coyne
Delegate of the Civil Aviation Safety Authority
27 November 2008