Airworthiness Directive · Amendment 39-15279 · Cirrus Design Corporation Model SR22 Airplanes
Cirrus Design Corporation Model SR22 Airplanes
This AD applies to Model SR22 airplanes, serial numbers 2334, 2420, and 2438 through 2749, that are certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for certain Cirrus Design Corporation (Cirrus) Model SR22 airplanes. This AD requires you to install a drain hole in the left and right outboard wing tips. This AD results from reports of pilots' inability to move the aileron control without using excessive force when flying in freezing conditions. Moisture from a prior rain shower entered through a gap at the interface of the left and right outboard wing tips and wing structure. The moisture traveled along the aft wing shear web, accumulated below the aileron control pulley, and froze at an altitude with an outside air temperature below freezing. When this moisture is exposed to freezing conditions, operation of the aileron control pulley is impaired. We are issuing this AD to prevent moisture from accumulating along the wing shear web where it may freeze in certain conditions. This condition could result in operational failure of the aileron control pulley, which could lead to loss of control.
To address this problem, you must do the following, unless already done:
| Actions | Compliance | Procedures |
|---|---|---|
| Install a drain hole in the left and right outboard wing tips | At whichever of the following occurs first: (1) Within the next 10 hours time-in-service after December 4, 2007 (the effective date of this AD); or (2) Within the next 30 days after December 4, 2007 (the effective date of this AD) | Follow Cirrus Design Service Bulletin SB 2X-57-08, dated November 2, 2007. |
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
