AD NUMBER: 2018-19-09

PRODUCT: Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters.

ACTION: Final Rule.

SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2017-14-03 for the aircraft listed above.

AD 2017-14-03 required an inspection and reduced the retirement lives of certain landing gear components.

This new AD retains the requirements of AD 2017-14-03, reduces the retirement lives of additional landing gear components, and requires repeating the inspection.

This AD was prompted by a revised analysis of the fatigue life of the landing gear.

COST: The FAA estimates that this AD affects 80 helicopters of U.S. Registry. The cost of compliance is estimated as follows:
At an average labor rate of $85 per work-hour:

• Replacing a wheel axle P/N 2392-2334-001 requires 2 work-hours and required parts cost $22,000, for a cost per helicopter of $22,170.
• Replacing a main landing gear (MLG) or NLG threaded hinge pin P/N 2392-2311-003 requires 1 work-hour and required parts cost $3,800, for a cost per helicopter of $3,885.
• Replacing a NLG cylinder P/N 2392-4006-005 requires 1 work-hour and required parts cost $27,200, for a cost per helicopter of $27,285.
• Replacing a NLG hinge pin P/N 2392-4312-003 requires 1 work-hour and required parts cost $4,400, for a cost per helicopter of $4,485.
• Replacing a landing gear actuator rod end P/N 2392-0876-901 requires 1 work-hour and required parts cost $900, for a cost per helicopter of $985.
• Replacing a MLG cylinder P/N 2392-2006-005 requires 2 work-hours and required parts cost $33,100, for a cost per helicopter of $33,270.
• Replacing a MLG pin outboard P/N 2392-2312-003 requires 1 work-hour and required parts cost $4,300, for a cost per helicopter of $4,385.
• Replacing a MLG bulkhead left-hand side P/N 92201-08111-105, -107, and -109 requires 70 work-hours and required parts cost $12,550, for a cost per helicopter of $18,500.
• Replacing a MLG bulkhead right-hand side P/N 92201-08111-106, -108, and -110 requires 70 work-hours and required parts cost $12,550, for a cost per helicopter of $18,500.
• Inspecting the NLG airframe fitting assembly P/N 92209-01101-041 requires 8 work-hours, and required parts cost is minimal, for a cost of $680 per helicopter and $54,400 for the U.S. fleet, per inspection cycle.
• If required, replacing a NLG actuator fitting P/N 92209-01101-101 requires 70 work-hours, and required parts cost $10,000, for a cost per helicopter of $15,950.

FMI: AD