AD/ECUREUIL/40 - Tail Rotor Gearbox Casing
1AD/ECUREUIL/40 - Tail Rotor Gearbox Casing
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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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Eurocopter AS 350 (Ecureuil) Series Helicopters
AD/ECUREUIL/40 Tail Rotor Gearbox Casing 1/88
Applicability: All model AS 350 series helicopters.
Requirement: 1. Inspect the tail rotor gearbox casing in accordance with Para 1C(2) of SB No.
05.18.
- Inspect and modify the tail rotor gearbox in accordance with Para 1C(3) of SB No. 05.18.
Compliance: For Para 1. Within 50 hours time in service after 25 November 1987 and thereafter at intervals not exceeding 50 hours time in service, until modification AMS 350A07- 8535 (polishing blend radii) is incorporated. After modification, inspect at intervals not exceeding 400 hours time in service.
For Para 2. Prior to exceeding 1100 hours total time in service or within 100 hours time in service after 25 November 1987, whichever is the later.
Background: The manufacturer has received reports at cracking in the blade horn support yoke radius just inboard at where the tail rotor control bellcrank pivot bolt is located.