# Airworthiness Directives; Bombardier Model CL-215-1A10 (Water Bomber), CL-215-6B11 (CL215T Variant), and CL-215-6B11 (CL415 Variant) Airplanes
> **Rule** · Final rule. · Published 2005-09-01 · Effective 2005-10-06 · 70 FR 52009
## Document
- **Document number:** 05-17323
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 52009
- **Publication date:** 2005-09-01
- **Effective date:** 2005-10-06
- **FAA docket:** Docket No. FAA-2005-21595
## Abstract

The FAA is superseding an existing airworthiness directive (AD), which applies to certain Bombardier Model CL-215-1A10 and CL-215- 6B11 series airplanes. That AD currently requires repetitive ultrasonic inspections to detect cracking of the lower caps of the wing front spar and rear spar, and corrective action if necessary. This new AD reduces the threshold to do the initial inspections and revises the repetitive inspection interval. This new AD also adds a repetitive ultrasonic inspection of the wing lower skin. This AD results from reports of cracks in the front and rear spar lower caps. We are issuing this AD to detect and correct cracking of the lower caps of the wing front spar and rear spar, which could result in reduced structural integrity of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/09/01/05-17323/airworthiness-directives-bombardier-model-cl-215-1a10-water-bomber-cl-215-6b11-cl215t-variant-and)
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