# Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

**Action Urgency Score:** 20/100

| Field | Value |
|---|---|
| Agency | Transportation Department; Federal Aviation Administration |
| Type | Proposed rule |
| Action | Notice of proposed rulemaking (NPRM). |
| Published | 2026-09-16 |
| Comments close | 2026-11-02 |
| Significant | No |
| CFR parts | 14 CFR 39 |
| Summary | The FAA proposes to adopt a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Model DHC-8-401 and DHC-8-402 airplanes. This proposed AD was prompted by a report that instructions for fay, fillet, and rivet dome sealing were omitted for a bracket installed on the inboard surface of the tank rib, which could allow fuel to leak from the wing fuel tank into the wing dry bay. This proposed AD would require a detailed visual inspection of the affected bracket assembly for signs of fuel leakage and for the prese |
| Document number | 2026-18956 |

## Why this score


Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/09/16/2026-18956/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by). Last refreshed: 2026-11-04T21:40:49.974Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.