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Airworthiness Directive

AD 98-21-09 63 FR 64849 Active

Federal Aviation Administration · 14 CFR part 39

Requires installing fuel tank vent tube(s), with modified attachment to the mast tube, if not previously accomplished; installing a spring into the flexible tube leading to the main fuel tank; and installing a spring into the…

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FR document
98-31328
Amendment
39-10908
Published
1998-11-24
Effective
1998-12-09
Models covered
1

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/98-21-09 · 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

98-21-09

FR doc 98-31328 · 63 FR 64849

AD 98-21-09Published 1998-11-24Effective 1998-12-09

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 installing fuel tank vent tube(s), with modified attachment to the mast tube, if not previously accomplished; installing a spring into the flexible tube leading to the main fuel tank; and installing a spring into the flexible tube leading to the auxiliary fuel tank, if an auxiliary fuel tank is installed.

Full official abstract

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 98-21-09, which was sent previously to all known U.S. owners and operators of Robinson Helicopter Company (RHC) Model R22 helicopters by individual letters. This AD requires installing fuel tank vent tube(s), with modified attachment to the mast tube, if not previously accomplished; installing a spring into the flexible tube leading to the main fuel tank; and installing a spring into the flexible tube leading to the auxiliary fuel tank, if an auxiliary fuel tank is installed. This amendment is prompted by an incident in which the flexible vent connecting the rigid vent tube to the main fuel tank kinked, resulting in fuel starvation and a hard landing after uncommanded engine shutdown. The actions specified by this AD are intended to prevent fuel starvation, loss of engine power, and a subsequent forced landing.

More directives for Robinson R22

  1. AD 2024-20-03 Airworthiness Directives; Robinson Helicopter Company Helicopters Effective 2024-11-29
  2. AD 2024-04-02 Airworthiness Directives; Robinson Helicopter Company Helicopters Effective 2024-04-02
  3. AD 2022-12-08 Airworthiness Directives; Robinson Helicopter Company Helicopters Effective 2022-06-29
  4. AD 2014-23-16 Airworthiness Directives; Robinson Helicopter Company Helicopters Effective 2015-01-09
  5. AD 2013-19-06 Airworthiness Directives; Robinson Helicopter Company (Robinson) Effective 2013-11-05

All Robinson R22 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