AD 2005-12-18

Recurring final rule
Data completeness: 70%

Airworthiness Directives; Boeing Model 757 Series Airplanes

AD Number
2005-12-18
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. 2003-NM-89-AD
FR Citation
70 FR 35166

Applicability

TypeManufacturerModelDetails
aircraft Boeing 757 Airworthiness Directives; Boeing Model 757 Series Airplanes

Unsafe Condition

Grease contamination on the primary horizontal stabilizer trim actuator (HSTA) brake, which could result in loss of the primary brake function. Combined with the loss of the secondary HSTA brake function, this could lead to loss of control of the airplane.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Repetitive testing of the secondary brakes of the HSTA for certain affected airplanes. Repetitive overhauls of the primary brake and differential assembly of the HSTA for all affected airplanes, which serves as terminating action for the repetitive testing of the secondary brake.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Within the compliance times specified in the final rule, which considers safety issues, manufacturer recommendations, availability of repair parts, and normal maintenance schedules.

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Affected Aircraft

All Boeing Model 757 series airplanes.

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 6, 2026

Rights: U.S. Government Public Domain

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