AD NUMBER: 2019-10-03

PRODUCT: All Boeing Model 737-100, -200, -200C, -300, -400, and -500 series airplanes.

ACTION: Final Rule.

SUMMARY: This AD was prompted by reports of cracks caused by corrosion of the edge of the bore of the spot face and corrosion of the lug bore of certain side-strut support fitting lugs.

This AD requires repetitive detailed inspections of the left and right side-strut support fitting lugs with bushings installed for any corrosion, any crack, or any severed lug; repetitive detailed and high frequency eddy current (HFEC) inspections of the left and right side-strut support fitting lugs with bushings removed for any corrosion or any crack; and applicable on-condition actions.

DATES: This AD is effective July 11, 2019.

COST: The FAA estimates that this AD affects 302 airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

Repetitive detailed inspection of left and right side lugs with bushings installed: 17 work-hours × $85 per hour = $1,445 per inspection cycle per airplane.
Repetitive detailed and HFEC inspections of left and right side lugs with bushings removed: 29 work-hours × $85 per hour = $2,465 per inspection cycle per airplane.

FMI: AD