Bombardier (Boeing Canada/De Havilland)
Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes
Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes
| AD/DHC-8/118 | Spoiler Lift Dump Valves | 4/2006 |
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| Applicability: | Bombardier Inc. DHC-8 Models 400, 401 and 402, serial numbers 4005, 4006, 4008 through 4015 and 4018 through 4052. |
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| Requirement: | 1. Replace all spoiler lift dump valves that have a serial number in the range from 5164 through 5264 or from 5267 through 5279.2. Do not install spoiler lift dump valves with a serial number that is in the suspect range any aircraft unless the manufacturing defect has been corrected. These corrected valves are identified with a serial number that includes the suffix ‘A’ (e.g. S/N 5164A).Note: Transport Canada AD CF-2001-44 refers. |
| Compliance: | 1. Within 30 days after the effective date of this AD, unless previously accomplished.2. After the effective date of this directive. |
| This Airworthiness Directive becomes effective on 13 April 2006. | |
| Background: | The manufacturer of the spoiler lift dump valves has determined that a venting slot was omitted during the manufacture of a batch lot of solenoid armatures. Although the affected spoiler lift dump valves passed acceptance test procedures and no problems have been observed with in-service aircraft, this defect has the potential to prevent the ground spoilers from deploying. |
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James Coyne
Delegate of the Civil Aviation Safety Authority
3 March 2006