Airworthiness Directive 2000-01-11
one-timeAirworthiness Directives; Eurocopter Deutschland GMBH Model MBB- BK 117 Helicopters
What this AD requires
This amendment supersedes an existing emergency priority letter airworthiness directive (AD), applicable to Eurocopter Deutschland GMBH (ECD) Model MBB-BK 117 helicopters, that currently requires, before further flight, creating a component log card or equivalent record and determining the age and number of flights on the tension-torsion (TT) strap. The AD also requires inspecting and removing, as necessary, certain unairworthy TT straps. This amendment requires the same actions as the emergency priority letter AD but clarifies the compliance requirements specified in the emergency priority letter AD. This amendment is prompted by an accident in which a main rotor blade (blade) separated from a helicopter due to fatigue failure of a TT strap. The actions specified by this AD are intended to prevent failure of a TT strap, loss of a blade, and subsequent loss of control of the helicopter.
Which aircraft AD 2000-01-11 applies to
Addresses tension-torsion (TT) strap fatigue failure risking main rotor blade separation; life-limits/inspects TT straps by age and flight count per Eurocopter Deutschland (ECD/MBB) Alert SB MBB-BK 117 No. ASB-MBB-BK 117-10-120 Rev 1. Applies to MBB/Eurocopter BK117, per explicit SB reference.
Whether AD 2000-01-11 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:
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.