CTHIn ForceLegislation
AD/DHC-8/55 Amdt 1 Horizontal Stabiliser Skin Disbonding Follow-up 7/2022
De Havilland Canada (Bombardier) DHC-8 SDe Havilland Canada (Bombardier) DHC-8 Series Aeroplanes
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De Havilland Canada (Bombardier) DHC-8 Series Aeroplanes
| AD/DHC-8/55 Amdt 1 | Horizontal Stabiliser SkinDisbonding Follow-up | 7/2022 |
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| Applicability: | All De Havilland Canada (DHC) DHC-8, Series 100 and 300 aircraft which have any horizontal stabilisers serial numbered CAP 003 through CAP 214 fitted. |
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| Requirement: | 1. For Horizontal Stabilisers, Serial Numbers CAP 003 through CAP 050:Perform an Ultrasonic Bond Inspection of the upper and lower skin panels (part number 85510025 and 85510026) for disbonding as outlined in DHC Non-Destructive Testing Manual, PSM 1-8-7A, Part 4, Section 55-00-01, as in force on the commencement date of this AD.2. For Horizontal Stabilisers, Serial Numbers CAP 003 through CAP 214:Carry out the requirements stated in the Airworthiness Limitations List (AWL) of DHC Maintenance Program Manual PSM 1-8-7 (for series 100 aircraft) and AWL of DHC Maintenance Program Manual PSM 1-83-7 (for Series 300 aircraft), as in force on the commencement date of this AD.Note: Transport Canada AD CF-98-24 is the basis for this AD. |
| Compliance: | For requirement 11. Unless already accomplished within the 3 months before 5 December 1998; repeat between 12 and 14 months after the initial inspection.For requirement 22. a. For Horizontal Stabilisers Serial Number CAP 003 through CAP 050: Following the Compliance 1 repeat inspection, inspect within the next 2 years and thereafter at intervals not to exceed 2 years.2. b. For Horizontal Stabilisers Serial Numbers CAP 051 through CAP 214:i. Where a past inspection fell due in 1998, unless already accomplished, perform the inspection as scheduled and repeat thereafter at intervals not to exceed 2 years.ii. Where a past inspection fell due in 1999, unless already accomplished, repeat thereafter at intervals not to exceed 2 years. |
| iii. Where a past inspection fell due after 1 January 2001, perform the inspection 1 year earlier and repeat thereafter at intervals not to exceed 2 years.Note: The inspection interval has been reduced from 3 years to 2 years in accordance with Temporary Revision (TR) No. 63 of the AWL in the DHC Maintenance Program Manual PSM 1-8-7 for series 100 aircraft and TR No. AWL 3-70 of the AWL for the DHC Maintenance Program Manual PSM 1-83-7 for the 300 series aircraft.For requirements 1 and 2Disbonds beyond the local disbond limits defined in DHC document PSM 1- 8 -7A, Part 4, Section 55-00-01, as in force from time to time, must be repaired before further flight. |
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