# Proposed AD FAA-2025-1107: Viking Air Limited (Type Certificate Previously Held by Bombardier Inc. and de Havilland, Inc.) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2025-17-08
- Products: Viking Air
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 20, 2025, 90 FR 26228
- Comments due: August 4, 2025
- Became: [AD 2025-17-08](https://openairdocs.org/ad/2025-17-08)
- Docket: FAA-2025-1107 (https://www.regulations.gov/docket/FAA-2025-1107, where comments are filed)
- Project: MCAI-2024-00784-A
- FR document: 2025-11327
- Official PDF: https://openairdocs.org/files/sha256/db/52/db5221bcd89b998ca97c65e96b7569a5b24f5a29d146600941e391cd63ccbb3d (from https://www.govinfo.gov/content/pkg/FR-2025-06-20/pdf/2025-11327.pdf)
- Federal Register: https://www.federalregister.gov/documents/2025/06/20/2025-11327/airworthiness-directives-viking-air-limited-type-certificate-previously-held-by-bombardier-inc-and
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2025-11327-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2025-1107

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2022-23-08, which applies to all Viking Air Limited (Viking) Model DHC- 3 airplanes. AD 2022-23-08 requires a visual inspection of the stabilizer actuator to confirm that the stabilizer actuator lock ring is present, correctly seated in the groove in the upper housing, and engaged in the clamp nut, applicable corrective actions, application of a torque seal, and sending the inspection results to the FAA. This proposed AD would require repetitively inspecting the stabilizer actuator to confirm that the stabilizer actuator lock ring is present, correctly seated in the groove in the upper housing, and engaged in the clamp nut; taking applicable corrective actions; applying a witness mark (torque seal); and installing a secondary retention feature as terminating action for the repetitive inspections. This proposed AD would also prohibit the installation of any stabilizer actuator unless it is a serviceable part. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 20, 2025: Notice of proposed rulemaking (NPRM). (first notice), FR document 2025-11327, comments due Aug 4, 2025 (https://www.federalregister.gov/documents/2025/06/20/2025-11327/airworthiness-directives-viking-air-limited-type-certificate-previously-held-by-bombardier-inc-and)

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