AircraftDirectives
MembershipSign inCreate free account
Menu
Airworthiness Directive

AD 2012-20-08 77 FR 63711 Active

Federal Aviation Administration · 14 CFR part 39

FR document
2012-25108
Amendment
39-17214
Published
2012-10-17
Effective
2012-11-21
Models covered
1
Last live check
2026-10-03

Printed from https://aircraftdirectives.com/ad/2012-20-08 · 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.

Opens your browser's print dialog. Choose “Save as PDF” to export a file. Keyboard: Ctrl+P or Cmd+P.

AD

2012-20-08

FR doc 2012-25108 · 77 FR 63711

AD 2012-20-08Published 2012-10-17Effective 2012-11-21

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 AC generator to determine the part number, and replacing the AC generator if necessary.

Full official abstract

We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model DHC-8-400 series airplanes. This AD was prompted by reports of alternating current (AC) generator failures in-service due to incomplete fusion in the weld joint of the rotor band assembly. This AD requires inspecting the AC generator to determine the part number, and replacing the AC generator if necessary. We are issuing this AD to prevent rotor windings from coming in contact with the generator housing, which could result in debris contaminating and potentially blocking the engine oil scavenge system, leading to loss of oil pressure and an in-flight shutdown of the engine.

More directives for de Havilland DHC-8 Dash 8

  1. AD 2026-11-06 Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type ... 2026-06-04
  2. AD 2026-08-07 Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type ... 2026-04-29
  3. AD 2025-19-05 Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type ... 2025-09-26
  4. AD 2025-05-06 Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type ... 2025-03-12
  5. AD 2024-22-07 Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type ... 2024-11-26

All de Havilland DHC-8 Dash 8 directives

View on Federal Register (opens in a new tab) Search DRS manually for AD 2012-20-08 (opens in a new tab)

Applies to 1 model in our index