Airworthiness Directive · Amendment 39-15227 · Fuel
Stemme GmbH & Co. KG Model S10-VT Gliders
This AD applies to Stemme Model S10-VT gliders, all serial numbers, certificated in any category.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by the 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, do the following actions.
(1) For all gliders with a type 11AB-K01 fuel pressure sensor installed:
(i) Before further flight after November 1, 2007 (the effective date of this AD), insert Stemme S10-VT Flight Manual page 4-2, Amendment No.: 3-SB A31-10-081, date of issue September 9, 1997, as attached to STEMME F & D Service Bulletin A31-10-081, Am.-Index: 01.a, dated June 25, 2007, into the Limitations section of the applicable airplane flight manual (AFM), upgrading the third check item “Daily Inspection” according to chapter 4.3, subchapter 4.3.1 “Engine”:
“* * * installed differential fuel pressure sensor must be checked with fuel cock “OPEN” and main fuel pumps ”ON”, for any signs of leakage in the area of case splitting.”
The owner/operator holding at least a private pilot certificate as authorized by section 43.7 of the Federal Aviation Regulations (14 CFR 43.7) may do this action. Make an entry in the aircraft records showing compliance with this portion of the AD following section 43.9 of the Federal Aviation Regulations (14 CFR 43.9).
(ii) If fuel leakage is found during any of the daily checks as required by the AFM insert of paragraph (f)(1)(i) of this AD, before further flight, repair any damage and replace the type 11AB-K01 sensor with the new type 11AB-KD sensor.
(iii) Within 30 days after November 1, 2007 (the effective date of this AD), replace any remaining type 11AB-K01 differential fuel pressure sensors with the new version 11AB-KD sensors.
(iv) After installation of the 11AB-KD differential fuel pressure sensor, remove the additionally introduced page from the Limitations section of the AFM as required by paragraph (f)(1)(i) of this AD. The repetitive daily inspection is no longer required.
(2) For all airplanes: As of 30 days after November 1, 2007 (the effective date of this AD), do not install a type 11AB-K01 differential fuel pressure sensor on any of the affected gliders as a replacement part.
Note: This AD differs from the MCAI and/or service information as follows: No differences.
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.
