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Tue, Apr 30, 2019

AD: Northrop Grumman LITEF GmbH LCR-100 AHRS Units

AD NUMBER: 2019-07-10

PRODUCT: Northrop Grumman LITEF GmbH LCR-100 Attitude and Heading Reference System (AHRS) units installed on various aircraft.

ACTION: Final Rule.

SUMMARY: This AD requires removing certain LCR-100 AHRS units from service.

This AD was prompted by test results showing loss of or invalid data.

DATES: This AD is effective May 29, 2019.

COST: The FAA estimates that this AD affects 50 aircraft of U.S. Registry. Operators may incur the following costs in order to comply with this AD:

Labor costs are estimated at $85 per work-hour, and typical installations consist of two AHRS units. Replacing two AHRS units takes about 4 work-hours and $62,630 for required parts, for a total cost of $62,970 per aircraft.

FMI: AD

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