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Airworthiness Directive

AD 99-21-09 64 FR 54199 Active

Federal Aviation Administration · 14 CFR part 39

Requires a one-time inspection to detect chafing of electrical wires in the cable trough below the cabin floor; repair, if necessary; installation of additional tie-mounts and tie-wraps; and application of sealant to rivet heads.

Federal Register (opens in a new tab)

FR document
99-25768
Amendment
39-11352
Published
1999-10-06
Effective
1999-11-10
Models covered
1

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/99-21-09 · AircraftDirectives restates official FAA and manufacturer records; the official sources named on this sheet control. Not an airworthiness determination.

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AD

99-21-09

FR doc 99-25768 · 64 FR 54199

AD 99-21-09Published 1999-10-06Effective 1999-11-10

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 a one-time inspection to detect chafing of electrical wires in the cable trough below the cabin floor; repair, if necessary; installation of additional tie-mounts and tie-wraps; and application of sealant to rivet heads.

Supersedes an earlier directive. See the official text.

Full official abstract

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Bombardier Model DHC-8-102, -103, -106, - 201, -202, -301, -311, and -315 series airplanes, that currently requires a one-time inspection to detect chafing of electrical wires in the cable trough below the cabin floor; repair, if necessary; installation of additional tie-mounts and tie-wraps; and application of sealant to rivet heads. This amendment requires the accomplishment of these same actions on additional airplanes. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent chafing of electrical wires, which could result in an uncommanded shutdown of an engine during flight.

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All de Havilland DHC-8 Dash 8 directives

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Applies to 1 model in our index