AD/AT/3 Amdt 5 - Landing Gear
1AD/AT/3 Amdt 5 - Landing Gear
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
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Airtractor AT-300, 400 and 500 Series Aeroplanes
AD/AT/3
Amdt 5
Landing Gear 4/97
Applicability: All models fitted with main landing gear spring legs P/N 40007-2/-3, 40058-1/-2 and 40086-1.
Requirement: Retire the main landing gear spring legs, the forward and aft main gear clamp block bolts and the inboard main gear large bolt.
Note: Snow Engineering Service Letters #117, #119 and FAA AD 82-06-12 refer.
Compliance: Retire the main landing gear spring legs at the number of landings listed in Table 1.
At the same time, retire the forward and aft main gear clamp block bolts and the inboard main gear large bolt.
If, during initial compliance with this directive, any or all of the components listed in the above Requirement are found to be outside the Table 1 lives, replace those components within 500 landings after 27 March 1997, or by 30 June 1997, whichever occurs first.
Table 1 - Spring Retirement Lives
| Spring Part # | Thickness (in) | Aircraft Fitted | Retire at every (#LDGs) |
|---|---|---|---|
| 40007-2 | 1.0 | AT-300, -301 | 7500 |
| 40007-2 | 1.0 | AT-302, -400A | 6000 |
| 40058-1 | 1.0 | AT-300, -301 | 7500 |
| 40058-1 | 1.0 | AT-400, -400A | 6000 |
| 40058-2 | 1.19 | AT-400, -402, -402A, -402B | 10000 |
| 40058-2 | 1.19 | AT-301, -400A, -401, -401B | 12500 |
| 40007-3 | 1.12 | AT-301, -401, -401B | 12500 |
| 40086-1 | 1.31 | AT-501, -502, -502A, -502B, -503A | 8000 |
Where the total number of landings during a period of service has not been recorded, the number of landings for that period of service is to be calculated using a rate of 4 landings per hour time in service.
This Amendment becomes effective on 27 March 1997.