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Airworthiness Directive

AD 2014-05-18 79 FR 14997 Active

Federal Aviation Administration · 14 CFR part 39

Requires repetitive functional checks of the MLG alternate extension system (AES) and eventual replacement of certain MLG door actuators with actuators that have either been reworked or do not have certain serial numbers.

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FR document
2014-04851
Amendment
39-17791
Published
2014-03-18
Effective
2014-04-22
Models covered
1

Last live check: 2026-10-04

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AD

2014-05-18

FR doc 2014-04851 · 79 FR 14997

AD 2014-05-18Published 2014-03-18Effective 2014-04-22

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 repetitive functional checks of the MLG alternate extension system (AES) and eventual replacement of certain MLG door actuators with actuators that have either been reworked or do not have certain serial numbers.

Full official abstract

We are adopting a new airworthiness directive (AD) for all Bombardier, Inc. Model DHC-8-400 series airplanes. This AD was prompted by a report that a batch of main landing gear (MLG) door actuators with a certain part number having certain serial numbers could be assembled with the scraper installed backward. This AD requires repetitive functional checks of the MLG alternate extension system (AES) and eventual replacement of certain MLG door actuators with actuators that have either been reworked or do not have certain serial numbers. We are issuing this AD to prevent incorrectly installed scrapers, which could hinder the operation of the MLG AES, and result in failure of the MLG AES on one side, and consequent unsafe asymmetrical landing configuration.

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Applies to 1 model in our index