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Airworthiness Directive

AD 2000-04-20 65 FR 10937 Active

Federal Aviation Administration · 14 CFR part 39

Requires replacing a certain hydraulic relief valve (valve) with a different valve.

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FR document
00-4794
Amendment
39-11603
Published
2000-03-01
Effective
2000-04-05
Models covered
1

Last live check: 2026-10-04

Printed from https://aircraftdirectives.com/ad/2000-04-20 · AircraftDirectives restates official FAA and manufacturer records; the official sources named on this sheet control. Not an airworthiness determination.

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AD

2000-04-20

FR doc 00-4794 · 65 FR 10937

AD 2000-04-20Published 2000-03-01Effective 2000-04-05

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 replacing a certain hydraulic relief valve (valve) with a different valve.

Full official abstract

This amendment adopts a new airworthiness directive (AD), applicable to Bell Helicopter Textron Canada (BHTC) Model 407 helicopters, that requires replacing a certain hydraulic relief valve (valve) with a different valve. This amendment is prompted by the discovery of a manufacturing defect in a valve. The actions specified by this AD are intended to prevent intermittent loss of hydraulic pressure to the flight controls 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 Effective 2026-08-21
  2. AD 2026-10-04 Airworthiness Directives; Bell Textron Canada Limited Helicopters Effective 2026-06-25
  3. AD 2025-13-01 Airworthiness Directives; Bell Textron Canada Limited Helicopters Effective 2025-07-08
  4. AD 2024-10-12 Airworthiness Directives; Bell Textron Canada Limited Helicopters Effective 2024-08-22
  5. AD 2023-17-51 Airworthiness Directives; Bell Textron Canada Limited Helicopters Effective 2023-09-21

All Bell 407 directives

View on Federal Register (opens in a new tab) View this AD in FAA DRS (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 1 model in our index