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SCHEDULE OF AIRWORTHINESS DIRECTIVES

Beechcraft 76 Duchess · Airworthiness Directives

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Overview

This document is a Schedule of Airworthiness Directives for the Beechcraft 76 Duchess Series Aeroplanes, specifically addressing the engine mount support structure. It outlines the requirements for visual inspections of the engine mount channels to ensure safety and compliance with aviation regulations. The directive applies to all models of the Beechcraft 76 and emphasizes the importance of regular inspections to prevent structural failures. It includes compliance timelines and background information on the directive's necessity due to reported failures in the engine mount channels.

  • Visual inspections of engine mount channels are required for all Beechcraft 76 models.
  • Inspect channels P/Nos. 105-980000 -19, -21, -23, -25 for cracks.
  • Compliance is required within 100 hours of service after April 30, 1984.
  • Subsequent inspections must occur at intervals not exceeding 100 hours.
  • Defective mount channels must be repaired to an acceptable scheme.

Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.

Reference only, not for flight. Use the current approved manual for your aircraft. See terms, section 5.

Document

Source

Copy found at services.casa.gov.au. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.

View original at services.casa.gov.au

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Document details

Type
·
Airworthiness Directives
Year
·
1991
Pages
·
1
File size
·
11 KB
Copy found at
·
services.casa.gov.au
About this document
What is the SCHEDULE OF AIRWORTHINESS DIRECTIVES?

The SCHEDULE OF AIRWORTHINESS DIRECTIVES is a airworthiness directives for the Beechcraft 76 Duchess, dated 1991.

How many pages is the SCHEDULE OF AIRWORTHINESS DIRECTIVES?

The copy of the SCHEDULE OF AIRWORTHINESS DIRECTIVES on file runs 1 pages.

What year was the SCHEDULE OF AIRWORTHINESS DIRECTIVES published?

The SCHEDULE OF AIRWORTHINESS DIRECTIVES — the Beechcraft 76 Duchess airworthiness directives on file — is dated 1991.

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In this document

Applicability

The directive applies to all models of the Beechcraft 76 Duchess series aeroplanes, ensuring that all aircraft within this category adhere to the specified inspection requirements.

Inspection Requirements

Pilots and maintenance personnel are required to visually inspect the engine mount channels with part numbers 105-980000 -19, -21, -23, and -25 for any cracks, particularly near the anchor nut that secures the engine mount bolt.

Compliance Timeline

The compliance for the inspection is set within 100 hours of time in service after April 30, 1984, or at the next scheduled inspection for Maintenance Release after that date, whichever comes first. Subsequent inspections must occur at intervals not exceeding 100 hours.

Background Information

This Airworthiness Directive was issued in response to reports of engine mount channel failures, necessitating a recurring inspection to ensure safety. The amendment also references Beechcraft Service Bulletin No 2018, which introduces a kit for easier inspection.

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Safety notes

  • Inspect for cracks in the engine mount channels to prevent structural failure.
  • Repair any defective mount channels and associated structures promptly.

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Full document text

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 76 (Duchess) Series Aeroplanes AD/BEECH 76/10 Amdt 2 Engine Mount Support Structure 2/91 Applicability: All models. Requirement: Visually inspect the engine mount channels P/Nos. 105-980000 -19, -21, -23, -25 for cracks in the area adjacent to the anchor nut securing the engine mount bolt. Note 1: If mount channel is cracked, visually inspect the associated keel and structure for cracks and structural distress. Note 2: Defective mount channels and associated structure are to be repaired to a scheme acceptable to the Authority. Note 3: Beechcraft SB No 2018 introduces a kit to provide inspection plates to facilitate the engine mount/nacelle channel inspection. Compliance: Within 100 hours time in service after 30 April 1984, or at the next scheduled inspection for Maintenance Release issue after 30 April 1984, whichever occurs first and thereafter at intervals not exceeding 100 hours time in service. Background: This Directive was raised in issue to include a recurring inspection due to reports of engine mount channel failure. Further defects have been reported since the initial one time inspection. This amendment introduces SB No 2018 which supersedes and cancels Beechcraft Service Instruction No 1237.

All Beechcraft 76 Duchess airworthiness directives