Equipment / Furnishings — Water Bombing System — Un-commanded Water Door Opening
- Published
- Effective
- Deadline
- Replaces
- 2021-51
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected CL-215 variants must complete the replacement of water door actuator microswitches and related wiring modifications within 24 months of 4 January 2022 for Group 1 aircraft. Group 2 aircraft must modify water door solenoid valve common grounds within the same timeframe. Additionally, from 4 January 2022, installation of solenoid valves without internal back EMF protection is prohibited, with approved alternatives allowed under the Global AMOC.
Summary
Airworthiness Directive CF-2021-51R1 addresses un-commanded water door opening issues in Viking Air Ltd. CL-215-1A10 (CL-215 variant) and CL-215-6B11 (CL-215T variant) aircraft. This directive mandates modifications to water door actuator microswitches, solenoid valve common grounds, and prohibits installation of certain solenoid valve parts without back EMF protection. It updates previous requirements to improve safety related to the water bombing system.
What changed
CF-2021-51R1 revises the applicability of Service Bulletin 215-389 by excluding the CL-215-6B11 model from its requirements, as this model already incorporates the necessary modifications. It also grants credit for an alternative modification authorized by Transport Canada Global AMOC AARDG-2022/A33. These changes correct previous errors and provide additional compliance options.
Why it matters
This directive is critical for operators and maintenance personnel to prevent un-commanded water door openings that could cause serious aircraft damage during takeoff, water scooping, or landing. Compliance ensures enhanced reliability of the water bombing system and reduces the risk of in-flight failures. It also clarifies part eligibility and acceptable modifications, aiding maintenance planning and regulatory adherence.
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