AD NUMBER: 2019-25-55

PRODUCT: Boeing Model 737-300, -400, and -700 series airplanes, modified to a Bedek Division Special Freighter (BDSF) by Supplemental Type Certificate (STC) ST01566LA, ST01961SE, or ST02556SE, with a 9G rigid barrier.

ACTION: Final rule; request for comments

SUMMARY: An emergency AD was sent to all known U.S. owners and operators of these airplanes. This AD requires complying with loading restrictions and methods.

This AD was prompted by a review of the manufacturing process for the 9G rigid barrier installed on BDSF conversions that identified a manufacturing non-compliance.

DATES: This AD is effective January 21, 2020 to all persons except those persons to whom it was made immediately effective by Emergency AD 2019-25-55, issued on December 13, 2019, which contained the requirements of this amendment. The FAA must receive comments on this AD by March 6, 2020.

COST: The FAA estimates that this AD affects 6 airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

• 1 work-hour × $85 per hour = $85

FMI: AD