Airworthiness Directives; Eurocopter Deutschland (Eurocopter) Helicopters
airworthiness · Rule · Final rule; request for comments. · Published 2013-07-09 · Effective 2013-07-24 · 78 FR 40956
Document
Document number
2013-16388
Federal Register citation
78 FR 40956
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Eurocopter Deutschland (Eurocopter)
Publication date
2013-07-09
Effective date
2013-07-24
FAA docket
Docket No. FAA-2013-0520
Abstract
We are adopting a new airworthiness directive (AD) for Eurocopter Model MBB-BK117 A-3, MBB-BK117 A-4, MBB-BK117 B-1, and MBB- BK117 C-2 helicopters with a Metro Aviation (Metro) vapor-cycle air conditioning kit installed in accordance with Supplemental Type Certificate (STC) No. SH3880SW. This AD requires repetitively inspecting the air conditioning drive pulley (pulley) for looseness and properly installed lockwire, and also requires reinstalling the pulley. This AD is prompted by two reports of the pulley detaching from the rotor brake disc on the tail rotor (T/R) driveshaft. These actions are intended to prevent separation of the pulley, damage to the T/R driveshaft, and subsequent loss of control of the helicopter.