Document ID: chunk:federal_register_of_legislation:F2006B04647:body:0:p1
Version: federal_register_of_legislation:F2006B04647
Segment Type: other
Provision Reference: 
Character Range: 4–3036

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

    Bell Helicopter Textron 412 Series Helicopters

AD/BELL412/12
    Amdt 5

    Applicability: All models.

                                     Vertical Fin Forward Spar 6/93 DM

                 Requirement:  1. For helicopters fitted with fin spar cap P/N 212-030-447-001: Inspect the spar cap for cracks, corrosion and doubler debonding in accordance with Bell ASB 412-92- 65.

               Note: FAA AD 93-02-07 refers.

               Note: All fin spar caps P/N 212-030-447-001 should have been modified with a cold bonded doubler in accordance with Bell ASB 412-85-20 not later than 31 March 1986. Amendment 2 to this AD referred.

                 2.    For helicopters fitted with fin spar cap P/N 212-030-447-101:

                   1. If cap thickness is greater than or equal to 0.190 inches when measured as shown in Bell ASB 412-86-24, no further action is required by this AD;

b.    If cap thickness is less than 0.190 inches and the cap has been modified with a cold bonded doubler in accordance with Bell ASB 412-86-24, inspect for cracks, corrosion and doubler debonding using the inspection technique described in Part I of Bell ASB 412-92-65. Inspect at intervals not exceeding 100 hours time in service or 25 flight operation days, whichever occurs earlier, until replaced by a new cap P/N 212-030-447-101 in accordance with Bell ASB 412-92-65;

c.    If cap thickness is less than 0.190 inches, but not less than 0.155 inches, and the cap has not been modified with a cold bonded doubler in accordance with Bell ASB 412-86-24, inspect for cracks in accordance with the inspection technique described in Part I of Bell ASB 412-85-20 Revision B. Inspect at intervals not exceeding 20 hours time in service or 5 flight operation days, whichever occurs earlier, until replaced with a new cap P/N 212-030-447-101 in accordance with Bell ASB 412-92-65.

               Note: All fin spar caps P/N 212-030-447-101 that were less than 0.155 inches thick should have been modified with a cold bonded doubler in accordance with Bell ASB 412-86-24 not later than 31 December 1986. AD/BELL 412/16 (incorporated into this AD at Amendment 3) referred.

    Compliance: Inspect within 25 hours time in service from 26 March 1993.

               Re-inspect at intervals not to exceed 25 hours time in service, until replaced with a new cap P/N 212-030-447-101 in accordance with Bell ASB 412-92-65.
 COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

           Background:  P/N 212-030-447-001 fin spar caps with a cold bonded doubler fitted in accordance with Bell ASB 412-85-20, and undersized P/N 212-030-447-101 fin spar caps with a cold bonded doubler fitted in accordance with Bell ASB 412-86-24, require inspections because of reports of cracks originating from