Is AD 99-1827 a recurring Airworthiness Directive?

No — AD 99-1827 is a one-time directive. Verify it was complied with in the aircraft's records.

Airworthiness Directive 99-1827

Q: Which aircraft does AD 99-1827 apply to?

AD 99-1827 applies to Schempp-Hirth K.G. — models Standard-Cirrus, Nimbus-2, JANUS, Mini-Nimbus HS-7. Serial/part conditions may narrow it to specific aircraft.

one-time

AD 99-1827 · 1999-01-28 · airframe

Airworthiness Directives; Schempp-Hirth K.G. Models Standard- Cirrus, Nimbus-2, JANUS, and Mini-Nimbus HS-7 Sailplanes

What this AD requires

This amendment adopts a new airworthiness directive (AD) that applies to certain Schempp-Hirth K.G. (Schempp-Hirth) Models Standard- Cirrus, Nimbus-2, JANUS, and Mini-Nimbus HS-7 sailplanes. This AD requires installing a safety device for the tailplane locking hook. 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 the locking hook on the tailplane attachment bracket from disengaging, which could result in the horizontal tailplane coming loose from the fin with possible loss of longitudinal control of the sailplane.

Which aircraft AD 99-1827 applies to

MakesSchempp-Hirth K.G.

ModelsStandard-Cirrus, Nimbus-2, JANUS, Mini-Nimbus HS-7

Serial-conditional — narrows to serials 573–573, 586–586, 593–593, 595–595, 597–599, 601–701, 86–86, 93–93, 96–116, 118–129, 131–131, 176–176, 1–55, 59–59, 1–60, 65–65.

Whether AD 99-1827 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.

Date — When the work was done.

Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.

Signature & certificate — The A&P/IA who returned it to service, with certificate number.

Is AD 99-1827 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.