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Airworthiness Directive

AD 98-19-01 63 FR 48417 Active

Federal Aviation Administration · 14 CFR part 39

Requires replacing the O-ring that is installed in the mounting part of the pitot tube (in the propeller dome) with one of improved design.

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FR document
98-23967
Amendment
39-10744
Published
1998-09-10
Effective
1998-09-25
Models covered
1

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/98-19-01 · AircraftDirectives restates official FAA and manufacturer records; the official sources named on this sheet control. Not an airworthiness determination.

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AD

98-19-01

FR doc 98-23967 · 63 FR 48417

AD 98-19-01Published 1998-09-10Effective 1998-09-25

FAA rule - 14 CFR 39

FAA rule. Compliance with an applicable AD is required under 14 CFR 39.7. Check its effective date, applicability, compliance times and current status.

Requires replacing the O-ring that is installed in the mounting part of the pitot tube (in the propeller dome) with one of improved design.

Full official abstract

This amendment adopts a new airworthiness directive (AD) that applies to certain Stemme GmbH & Co. KG (Stemme) Model S10 sailplanes. This AD requires replacing the O-ring that is installed in the mounting part of the pitot tube (in the propeller dome) with one of improved design. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Germany. The actions specified by this AD are intended to prevent failure of the pitot tube O-ring caused by an ineffective design, which could result in the pitot tube falling out and the sailplane pilot losing airspeed indications.

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All Stemme S10/S12 directives

View on Federal Register (opens in a new tab) View this AD in FAA DRS (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 1 model in our index