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Airworthiness Directive

AD 2021-23-02 86 FR 68107 Active

Federal Aviation Administration · 14 CFR part 39

Requires doing a detailed visual inspection for chafing and proper clearance of the left-hand (LH) and right-hand (RH) main landing gear (MLG) primary zone advanced pneumatic detector (APD) sensing lines, the hydraulic tube…

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FR document
2021-26109
Amendment
39-21800
Published
2021-12-01
Effective
2022-01-05
Models covered
1

Last live check: 2026-10-04

Printed from https://aircraftdirectives.com/ad/2021-23-02 · 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

2021-23-02

FR doc 2021-26109 · 86 FR 68107

AD 2021-23-02Published 2021-12-01Effective 2022-01-05

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 doing a detailed visual inspection for chafing and proper clearance of the left-hand (LH) and right-hand (RH) main landing gear (MLG) primary zone advanced pneumatic detector (APD) sensing lines, the hydraulic tube assemblies, and the surrounding structure, and doing all applicable corrective action.

Full official abstract

The FAA is adopting a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited Model DHC-8-401 and - 402 airplanes. This AD was prompted by reports of loss of hydraulic fluid and annunciation of the check fire detect light. This AD requires doing a detailed visual inspection for chafing and proper clearance of the left-hand (LH) and right-hand (RH) main landing gear (MLG) primary zone advanced pneumatic detector (APD) sensing lines, the hydraulic tube assemblies, and the surrounding structure, and doing all applicable corrective action. The FAA is issuing this AD to address the unsafe condition on these products.

More directives for de Havilland DHC-8 Dash 8

  1. AD 2026-11-06 Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type ... Effective 2026-07-09
  2. AD 2026-08-07 Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type ... Effective 2026-06-03
  3. AD 2025-19-05 Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type ... Effective 2025-10-31
  4. AD 2025-05-06 Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type ... Effective 2025-04-16
  5. AD 2024-22-07 Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type ... Effective 2024-12-31

All de Havilland DHC-8 Dash 8 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