De Havilland DHC-1 (Chipmunk) Series Aer
De Havilland DHC-1 (Chipmunk) Series Aeroplanes
De Havilland DHC-1 (Chipmunk) Series Aeroplanes
| AD/DHC-1/39 Amdt 1 | Flap Operating System Latch Plate | 13/2011 |
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| Applicability: | English production (C1) all models and Portuguese (T Mk 20) production models, fitted with flap operating system latch plate Part Number C1-CF-1489; or where the part number of the installed Latch Plate is unknown. |
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| Requirement: | Action in accordance with Chipmunk TNS CT (C1) No. 208.Note: UK CAA AD G-2009-0001 refers. |
| Compliance: | At the next scheduled maintenance inspection after the effective date of this AD, unless already accomplished. |
| This Amendment becomes effective on 23 June 2011. | |
| Background: | A report was received of the in-service failure of a flap operating system Latch Plate, Part Number C1-CF-1489. Investigation revealed that the part in question had not been manufactured in accordance with the applicable De Havilland drawing, and failed due to rapid wear. Unless bogus latch plate(s) are detected and removed, failure could occur and result in uncommanded flap retraction.This amendment is issued to include the Portuguese manufactured T Mk 20 model in the applicability of this Directive.The original issue of this AD became effective on 9 April 2009. |
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Glen Steemson
Delegate of the Civil Aviation Safety Authority
17 June 2011