Airworthiness Directive · Amendment 39-14765 · Stemme GmbH & Co. KG Model STEMME S10-VT Sailplanes
Stemme GmbH & Co. KG Model STEMME S10-VT Sailplanes
This AD applies to Model STEMME S10-VT sailplanes, serial numbers 11-001 through 11-103, that are certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for certain Stemme GmbH & Co. KG Model STEMME S10-VT sailplanes. This AD requires you to do a one-time inspection of all exhaust bends (each cylinder 1 to 4) in the area of the curvature bend near the cylinder flange, replace any damaged exhaust pipes found, and recondition the heat protection wrapping. This AD results from deformations and cracks found at an exhaust bend during maintenance work. We are issuing this AD to detect and correct cracks in the exhaust pipes. Damaged exhaust pipes could cause exhaust gases to expand into the engine compartment and/or carbon monoxide (CO) to leak into the cockpit section.
To address this problem, you must do the following, unless done previously:
| Actions | Compliance | Procedures |
|---|---|---|
| (1) Inspect all exhaust bends (each cylinder 1 to 4) in the area of the curvature bend near the cylinder flange for deformations, cracks, and/or flattening. Use a minimum 10X magnifier to aid the inspection | Within the next 10 hours time-in-service after Octoober 10, 2006 | Follow Stemme GmbH & Co. KG Service Bulletin A31-10-075 Am.-Index: 01.a, dated July 06, 2006, except use a minimum 10X magnifier to aid the inspection. |
| (2) If any damage (deformation, cracks, and/or flattening) is found in the inspection required in paragraph (e)(1) of this AD, replace the damaged exhaust pipe | Before further flight after the inspection required by paragraph (e)(1) of this AD | Follow Stemme GmbH & Co. KG Service Bulletin A31-10-075 Am.-Index: 01.a, dated July 06, 2006. |
| (3) Recondition the heat protection wrapping | Before further flight after the inspection done in paragraph (e)(1) or the replacement done in paragraph (e)(2) of this AD | Follow Stemme GmbH & Co. KG Service Bulletin A31-10-075 Am.-Index: 01.a, dated July 06, 2006. |
Note: According to the Maintenance Manual an inspection of the condition of the exhaust pipes is scheduled for every 100 flight hours. It is recommended to pay special attention to this item.
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.
