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Airworthiness Directive

AD 2012-18-09 77 FR 57005 Active

Federal Aviation Administration · 14 CFR part 39

FR document
2012-22038
Amendment
39-17185
Published
2012-09-17
Effective
2012-10-22
Models covered
1
Last live check
2026-09-30

Printed from https://aircraftdirectives.com/ad/2012-18-09 · 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

2012-18-09

FR doc 2012-22038 · 77 FR 57005

AD 2012-18-09Published 2012-09-17Effective 2012-10-22

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 you to replace tailboom-attachment hardware (attachment hardware), and perform initial and recurring determinations of the torque on the nuts of the tailboom-attachment bolts (bolts) at all four attachment locations.

Full official abstract

We are adopting a new airworthiness directive (AD) for the Bell Helicopter Textron Canada Limited (BHTC) Model 407 helicopters. This AD requires you to replace tailboom-attachment hardware (attachment hardware), and perform initial and recurring determinations of the torque on the nuts of the tailboom-attachment bolts (bolts) at all four attachment locations. This AD was prompted by a review of the tailboom-attachment installation, which revealed that the torque value of the bolts specified in the BHTC Model 407 Maintenance Manual and applied during manufacturing was incorrect and exceeded the torque range recommended for the bolts. The actions required by this AD are intended to prevent an over-torque of a bolt, bolt failure, loss of the tailboom, and subsequent loss of control of the helicopter.

More directives for Bell 407

  1. AD 2026-14-07 Airworthiness Directives; Bell Textron Canada Limited Helicopters 2026-07-17
  2. AD 2026-10-04 Airworthiness Directives; Bell Textron Canada Limited Helicopters 2026-05-21
  3. AD 2025-13-01 Airworthiness Directives; Bell Textron Canada Limited Helicopters 2025-06-23
  4. AD 2024-10-12 Airworthiness Directives; Bell Textron Canada Limited Helicopters 2024-07-18
  5. AD 2023-17-51 Airworthiness Directives; Bell Textron Canada Limited Helicopters 2023-09-06

All Bell 407 directives

View on Federal Register (opens in a new tab) View this AD in FAA DRS (opens in a new tab)

Applies to 1 model in our index