AD NUMBER: 2019-12-14

PRODUCT: Airbus Helicopters Deutschland GmbH (Airbus Helicopters) Model MBB-BK 117 C-2 helicopters.

ACTION: Final Rule.

SUMMARY:  This AD requires establishing or reducing the life limit of various parts.

This AD was prompted by recalculations.

DATES: This AD is effective August 2, 2019.

COST: The FAA estimates that this AD affects 128 helicopters of U.S. Registry. Operators may incur the following costs in order to comply with this AD:
Labor costs are estimated at $85 per hour.

• Replacing a nut takes about 5 work-hours and parts cost about $3,736 for an estimated replacement cost of $4,161.
• Replacing a quadruple nut upper takes about 5 work-hours and parts cost about $3,682 for an estimated replacement cost of $4,107.
• Replacing a quadruple nut lower takes about 5 work-hours and parts cost about $3,819 for an estimated replacement cost of $4,244.
• Replacing a bolt takes about 2 work-hours and parts cost about $418 for an estimated replacement cost of $588.
• Replacing an inner sleeve takes about 2 work-hours and parts cost about $20,826 for an estimated replacement cost of $20,996.
• Replacing a control ring assembly takes about 5 work-hours and parts cost about $11,500 for an estimated replacement cost of $11,925.
• Replacing a bellcrank-K (collective) takes about 4 work-hours and parts cost about $3,400 for an estimated replacement cost of $3,740.
• Replacing a control rod tube takes about 4 work-hours and parts cost about $1,197 for an estimated replacement cost of $1,537.
• Replacing a forked lever takes about 3 work-hours and parts cost about $6,138 for an estimated replacement cost of $6,393.

FMI: AD