SCHEDULE OF AIRWORTHINESS DIRECTIVES
Cessna 177 Cardinal · Airworthiness Directives
Overview
This document is an Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority of Australia, specifically addressing the Cessna 177 series aeroplanes. It outlines mandatory inspection and compliance requirements for the wing main spar carry-through section due to concerns about corrosion that could compromise structural integrity. The directive applies to all models within the Cessna 177 series and emphasizes the importance of regular inspections to ensure safety and airworthiness. The document provides specific timelines for compliance based on the age of the aircraft, ensuring that necessary inspections are conducted in a timely manner to prevent potential failures.
- All models of Cessna 177 series aeroplanes are affected by this directive.
- Immediate inspection is required for aircraft over ten years old.
- Aircraft under ten years must be inspected before reaching that age.
- Post-initial inspection, aircraft must be checked every six years, or every twelve years if a corrosion protection scheme is used.
- Corrosion in the wing spar carry-through forging can compromise structural integrity.
Document
Source
Originally published by services.casa.gov.au. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Airworthiness Directives
- Year
- 1990
- Pages
- 1
- File size
- 10 KB
- Publisher
- services.casa.gov.au
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In this document
Applicability
The directive applies to all models of the Cessna 177 series aeroplanes, mandating inspections for the wing main spar carry-through section.
Inspection Requirements
Operators must gain access to the upper and lower surfaces of the wing carry-through forging and inspect for any signs of corrosion. Repairs must follow schemes approved by the Civil Aviation Authority.
Compliance Timeline
Aircraft over ten years in service must comply immediately, while those under ten years must do so before reaching that age. After the initial inspection, all aircraft must be inspected at intervals not exceeding six years, or twelve years if an approved corrosion protection scheme is in place.
Background Information
The directive was issued in response to reports of corrosion in the wing spar carry-through forging, which has been found to affect the structural integrity of the wing in some cases. The amendment reflects findings from initial inspections and adjusts compliance times accordingly.
Safety notes
- Corrosion in the wing spar carry-through forging can adversely affect the structural integrity of the wing.
Full document text
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 177 Series Aeroplanes AD/CESSNA 177/30 Amdt 1 Wing Main Spar Carry-Through Section 10/90 Applicability: All models. Requirement: 1. Gain access to the upper and lower surfaces of the wing carry through forging. 2. Inspect the whole wing carry-through forging for any indications of corrosion. Repairs to the wing carry- through forging shall be in accordance with Schemes approved by the Authority. Compliance: Unless already accomplished in accordance with the initial issue of this Directive: a. For aircraft over ten years time in service since date of manufacture: forthwith, and b. For aircraft with less than ten years time in service since date of manufacture: before attaining ten years time in service, and c. For all aircraft after initial inspection: i) at periods not exceeding six years time in service, or ii) where the spar carry-through has been subjected to an approved corrosion protection scheme: at periods not exceeding twelve years. Background: There have been reports of corrosion in the wing spar carry-through forging on a number of aircraft. In two cases the corrosion was sufficiently advanced to adversely affect the structural integrity of the wing. Amendment 1 reflects the reported results from the initial issue of this Directive. This has enabled a reduction in the initial compliance time and an extension of the repeat inspection period.
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