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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

 

Image unavailable in extracted text Cessna 177 Series Aeroplanes

 

AD/CESSNA 177/30

Amdt 1

Applicability: All models.

Wing Main Spar Carry-Through Section 10/90

 

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:

 

1. 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.