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Airworthiness Directive 2001-01-52

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Official AD 2001-01-52 · FR doc 01-3103 · 2001-02-06 · airframe

Airworthiness Directives; Bell Helicopter Textron Canada Model 407 Helicopters

What this AD requires

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2001-01-52, which was sent previously to all known U.S. owners and operators of Bell Helicopter Textron Canada (BHTC) Model 407 helicopters by individual letters. This AD requires, before further flight, reducing the maximum approved never exceed velocity (Vne); inserting a copy of this AD into the Rotorcraft Flight Manual (RFM); installing a temporary placard on the flight instrument panel to indicate the reduced Vne limit; and installing a new redline Vne limit on all airspeed indicators. This amendment is prompted by an accident resulting from a suspected tail rotor strike to the tailboom. The actions specified by this AD are intended to prevent tail rotor blades from striking the tailboom, separation of the aft section of the tailboom with the tail rotor gearbox and vertical fin, and subsequent loss of control of the helicopter.

Which aircraft AD 2001-01-52 applies to

MakesBell

Cross-reference boilerplate only; model list precedes excerpt and was not captured. To prevent tail rotor blades striking the tailboom, requires reducing the placarded Vne to 100 KIAS (no airspeed-actuated pedal stop) or 110 KIAS (with pedal stop), inserting this AD into the Rotorcraft Flight Manual (BHT-407-FM-1), and re-marking the airspeed indicator redline. Incorporates the requirements of Emergency AD 2001-01-52.

Whether AD 2001-01-52 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 2001-01-52 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.