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Airworthiness Directive

AD 2001-13-01 66 FR 34104 Active

Federal Aviation Administration · 14 CFR part 39

Requires removing each existing tail rotor counterweight bellcrank (bellcrank) retention nut (retention nut), replacing each retention nut with a zero hours time-in-service (TIS) retention nut; and follow-up inspections of…

Federal Register (opens in a new tab)

FR document
01-15794
Amendment
39-12281
Published
2001-06-27
Effective
2001-08-01
Models covered
2

Last live check: 2026-10-04

Printed from https://aircraftdirectives.com/ad/2001-13-01 · AircraftDirectives restates official FAA and manufacturer records; the official sources named on this sheet control. Not an airworthiness determination.

This page is a reference Record, not an airworthiness or compliance determination. Official FAA and manufacturer sources control over our restatement, subject to governing law. Check applicability, current requirements and incorporated documents before acting. The owner or operator remains responsible for airworthiness and required records under 14 CFR 91.403 and 91.417, as applicable. Terms of Use: /terms.

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AD

2001-13-01

FR doc 01-15794 · 66 FR 34104

AD 2001-13-01Published 2001-06-27Effective 2001-08-01

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 removing each existing tail rotor counterweight bellcrank (bellcrank) retention nut (retention nut), replacing each retention nut with a zero hours time-in-service (TIS) retention nut; and follow-up inspections of installed retention nuts.

Full official abstract

This amendment adopts a new airworthiness directive (AD), for Bell Helicopter Textron, Inc. (BHTI) Model 205A-1, 205B, 212, 412, 412EP, and 412CF helicopters. This AD requires removing each existing tail rotor counterweight bellcrank (bellcrank) retention nut (retention nut), replacing each retention nut with a zero hours time-in-service (TIS) retention nut; and follow-up inspections of installed retention nuts. This AD is prompted by an in-flight loss of a bellcrank due to failure of the retention nut. The actions specified by this AD are intended to prevent failure of the retention nut, which could result in the bellcrank migrating off the crosshead spindle, loss of tail rotor control, and subsequent loss of control of the helicopter.

More directives for Bell 205 / 212

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  4. AD 2022-20-14 Airworthiness Directives; Bell Textron Inc., Helicopters and Various Res... Effective 2022-12-27
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All Bell 205 / 212 directives

View on Federal Register (opens in a new tab) Search DRS manually for AD 2001-13-01 (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 2 models in our index