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Airworthiness Directive

AD 99-04-21 64 FR 8499 Active

Federal Aviation Administration · 14 CFR part 39

Requires inspecting the main landing gear brake units for correct setting of the wear indicator pins, and re-setting the pins if incorrect.

Federal Register (opens in a new tab)FAA DRS (opens in a new tab)

FR document
99-3888
Amendment
39-11046
Published
1999-02-22
Effective
1999-04-02
Models covered
1

Last live check: 2026-10-04

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AD

99-04-21

FR doc 99-3888 · 64 FR 8499

AD 99-04-21Published 1999-02-22Effective 1999-04-02

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 inspecting the main landing gear brake units for correct setting of the wear indicator pins, and re-setting the pins if incorrect.

Full official abstract

This amendment adopts a new airworthiness directive (AD) that applies all British Aerospace Jetstream Model 3101 airplanes that have a certain wheel assembly incorporated and all Jetstream Model 3201 airplanes that are equipped with Dunlop AH54450 brake units. This AD requires inspecting the main landing gear brake units for correct setting of the wear indicator pins, and re-setting the pins if incorrect. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for the United Kingdom. The actions specified by this AD are intended to prevent failure of the main landing gear brakes because the wear indicator pins present a false indication of the remaining wear of the brake units, which could result in loss of control of the airplane during takeoff, landing, or taxi operations.

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All British Aerospace Jetstream 31/32 directives

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Applies to 1 model in our index