Airworthiness Directive · Amendment 39-15625 · Flight controls
Bombardier Model DHC-8-400, -401 and -402 Airplanes
This AD applies to Bombardier Model DHC-8-400, -401 and -402 airplanes, certificated in any category, having serial numbers 4001, 4003, 4004, and 4006 through 4081.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done: Prior to the accumulation of 22,000 total flight hours, or within 5,000 flight hours after the effective date of this AD, whichever comes later, replace all elevator centering torsion springs with new elevator centering torsion springs by incorporating Modsum 4-113482, in accordance with Bombardier Service Bulletin 84-27-31, dated April 27, 2007.
Note: This AD differs from the MCAI and/or service information as follows: No differences.
