Document ID: chunk:federal_register_of_legislation:F2009L00677:body:0:p2
Version: federal_register_of_legislation:F2009L00677
Segment Type: other
Provision Reference: 
Character Range: 2879–5868

intervals not exceeding 110 flight hours, check the tightening torque of the upper fin attachment screws and check the upper fin reinforcement splice for cracks and loosened rivets in accordance with the instructions specified in paragraph 2.B.3 of ASB No. 55.00.13 Revision 2, or later EASA approved revision.

           (iv) In the case of cracks, loosened rivets in the reinforcement splice or if the tightening torque of one or both of the attachment screws is less than 80% of the minimum torque value, before further flight, apply associated corrective actions in accordance with the instructions of paragraph 2.B.3.a.1, 2.B.3.a.2, or 2.B.3.a.3 (as applicable) of ASB 55.00.13 Revision 2, or later EASA approved revision.

        b. For helicopters with upper and lower fins post MOD 073288:

           (i) For helicopters which have accumulated less than 110 flight hours since the latest check performed in accordance with paragraph 2.B.3 of ASB No. 55.00.13 Revision 0, or later EASA approved revision:

           Within 110 flight hours after the latest check performed in accordance with paragraph 2.B.3 of ASB No. 55.00.13 Revision 0, or later EASA approved revision, check the tightening torque of the upper fin attachment screws and check the upper fin reinforcement splice for cracks and loosened rivets in accordance with the instructions specified in paragraph 2.B.3 of ASB No. 55.00.13 Revision 2, or later EASA approved revision.  Repeat thereafter at intervals not to exceed 110 flight hours.

           (ii) For helicopters which have accumulated more than 110 flight hours since the latest check performed in accordance with paragraph 2.B.3 Revision 0, or later EASA approved revision:

           Within 15 flight hours after 26 February 2009, check the tightening torque of the upper fin attachment screws and check the upper fin reinforcement splice for cracks and loosened rivets in accordance with the instructions specified in paragraph 2.B.3 of ASB No. 55.00.13 Revision 2, or later EASA approved revision.  Repeat thereafter at intervals not to exceed 110 flight hours.

                     (iii) In the case of cracks, loosened rivets in the reinforcement splice or if the tightening torque of one or both of the attachment screws is less than 80% of the minimum torque value, before further flight, apply the associated corrective actions in accordance with the instructions of paragraph 2.B.3.a.1, 2.B.3.a.2, or 2.B.a.3 (as applicable) of ASB 55.00.13 Revision 2, or later EASA approved revision.

                3. For all AS 350 B3 helicopters:

                Unless already accomplished, no later than 31 March 2009, remove the fins, modify the upper and lower fittings on the tail boom by increasing the diameter of the bolt holes, and replace bolts part number 22126BV060032L and washers part number 23112AG060LE with special bolts part number 350A23-4016-20 and special washers part number 350A23-4017-22; in accordance with ASB No.