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Airworthiness Directive

AD 2001-20-18 66 FR 52312 Active

Federal Aviation Administration · 14 CFR part 39

Requires establishing a life limit of 2200 hours time-in-service (TIS) for affected horizontal stabilizers.

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FR document
01-25693
Amendment
39-12466
Published
2001-10-15
Models covered
1

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/2001-20-18 · 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

2001-20-18

FR doc 01-25693 · 66 FR 52312

AD 2001-20-18Published 2001-10-15

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 establishing a life limit of 2200 hours time-in-service (TIS) for affected horizontal stabilizers.

Full official abstract

This amendment adopts a new airworthiness directive (AD) for Robinson Helicopter Company (RHC) Model R44 helicopters that requires establishing a life limit of 2200 hours time-in-service (TIS) for affected horizontal stabilizers. This amendment is prompted by engineering analysis which indicates that certain vertical-to- horizontal stabilizer attach channels (channels) will crack sooner than the original life limit of the horizontal stabilizer. The actions specified by this AD are intended to prevent a crack through a channel, separation of the stabilizers, and subsequent loss of directional control of the helicopter.

More directives for Robinson R44

  1. AD 2025-11-07 Airworthiness Directives; Robinson Helicopter Company Helicopters Effective 2025-07-11
  2. AD 2024-23-01 Airworthiness Directives; Robinson Helicopter Company Effective 2025-01-07
  3. AD 2024-20-03 Airworthiness Directives; Robinson Helicopter Company Helicopters Effective 2024-11-29
  4. AD 2024-19-11 Airworthiness Directives; Robinson Helicopter Company Helicopters Effective 2024-10-31
  5. AD 2024-04-02 Airworthiness Directives; Robinson Helicopter Company Helicopters Effective 2024-04-02

All Robinson R44 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