AD NUMBER: 2019-22-06

PRODUCT: Certain Boeing Model 737-800 series airplanes.

ACTION: Final rule

SUMMARY: This AD was prompted by reports of inadequate clearance between a certain fuel quantity indicating system (FQIS) tank unit and a certain reinforcement angle added as a part of a certain split winglet modification.

This AD requires a detailed inspection to measure the clearance between the FQIS tank unit and a certain reinforcement angle installed as a part of the split winglet modification, and repair if necessary.

DATES: This AD is effective December 30, 2019.

COST: The FAA estimates that this AD affects 16 airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

Detailed Inspection

• 7 work-hours × $85 per hour = $595 per airplane.

Repair

• 4 work-hours × $85 per hour = $340 per airplane

According to Aviation Partners Boeing, some or all of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected individuals. The FAA does not control warranty coverage for affected individuals. As a result, the FAA has included all known costs in the agency's cost estimate.

FMI: AD