Airframe — Corrosion
- Published
- Effective
- Deadline
- Replaces
- 2017-33
- Replaces
- 61-12
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What to do
Operators must continue existing corrosion inspections per the previous manual revision but incorporate the new inspection tasks listed in PSM 1-2-5 Revision 1 within eight months of the directive's effective date or when inspection thresholds are reached. Any detected corrosion must be assessed, repaired, and documented before further flight. Ongoing inspections must be repeated at intervals specified in the manual, and significant corrosion findings must be reported to Viking Air.
Summary
The Canadian Airworthiness Directive CF-2019-25 addresses corrosion inspection and control for Viking Air Ltd. DHC-2 Mk. I, Mk. II, and Mk. III aircraft. It mandates compliance with the revised Supplemental Inspection and Corrosion Control Manual (PSM 1-2-5, Revision 1) to ensure aging aircraft are properly inspected and maintained to prevent corrosion-related safety issues. This directive replaces previous corrosion-related directives for these aircraft models.
What changed
CF-2019-25 replaces the earlier directives CF-2017-33 and CF-61-12, introducing additional inspection tasks beyond the flight control system to other airframe components. It revises inspection intervals for certain tasks, extending some from one to two years and adjusting others based on flight hours or calendar time. The directive requires operators to follow the updated PSM 1-2-5 Revision 1 manual for corrosion inspections and repairs.
Why it matters
This directive is critical for operators and maintenance organizations to ensure the structural integrity and airworthiness of aging DHC-2 aircraft by addressing corrosion risks comprehensively. Compliance helps prevent unsafe conditions caused by corrosion, reduces the risk of unexpected failures, and aligns maintenance practices with the latest manufacturer guidance and regulatory requirements. It also streamlines inspection processes by eliminating redundant inspections from older directives.
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