Airworthiness DirectiveEASA AD US-2019-01-03

Landing Gear - Trunnion Pin Assemblies - Inspection / Lubrication / Replacement

Published: Mar 19, 2019
Effective: Mar 19, 2019
Deadline: Mar 19, 2019
Replaces: 2016-18-01

Boeing 737 600 700 700C 800

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What to do

Operators must comply with the inspection, lubrication, and replacement procedures as specified in AD 2019-01-03, including verifying part numbers of installed components and prohibiting installation of non-compliant parts. The directive becomes effective on March 19, 2019, and requires adherence to all specified actions by that date. Maintenance teams should review airplane records, perform required inspections, and apply corrective actions promptly to maintain airworthiness.

Summary

The Federal Aviation Administration's Airworthiness Directive 2019-01-03 addresses inspection, lubrication, and replacement requirements for the forward and aft trunnion pin assemblies of the main landing gears on certain Boeing 737-600, -700, -700C, -800, -900, and -900ER series airplanes. This directive updates previous requirements to include all affected airplanes and prohibits installation of certain landing gear components unless specific conditions are met. It aims to prevent corrosion and chrome damage that could lead to landing gear collapse.

What changed

Airworthiness Directive 2019-01-03 supersedes AD 2016-18-01 by expanding the applicability to include all affected Boeing 737 models and addressing rotable parts not covered previously. It retains the original requirements for repetitive lubrication and inspection, adds prohibitions on installing certain main landing gear or trunnion pin assemblies without compliance, and clarifies inspection procedures and part number verification.

Why it matters

This directive is critical for operators and maintenance organizations to ensure the structural integrity of the main landing gear trunnion pin assemblies, preventing potential landing gear failure during operation. Compliance reduces the risk of corrosion-related cracking and collapse, enhancing flight safety and regulatory adherence. It also clarifies maintenance record reviews and inspection requirements to manage rotable parts effectively.

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