AD 57-15-01

final rule
Data completeness: 60%

Airworthiness Directives; Aero Commander Models 560A, 560E and 680 Aircraft

AD Number
57-15-01
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Unknown
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft Twin Commander Aircraft LLC 560-A Airworthiness Directives; Aero Commander Models 560A, 560E and 680 Aircraft
aircraft Twin Commander Aircraft LLC 560-E Airworthiness Directives; Aero Commander Models 560A, 560E and 680 Aircraft
aircraft Twin Commander Aircraft LLC 680 Airworthiness Directives; Aero Commander Models 560A, 560E and 680 Aircraft

Unsafe Condition

Failures have occurred on the upper retaining pins on the main landing gear, which react rebound loads when the main gear lower piston reaches its limit of extension relative to the upper cylinder.

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

Required Actions

Perform daily inspections of center scissor bolts and bushings for shearing, cracking, or elongation, and check for scissor-to-strut or scissor-to-housing contact. Replace upper bearing retaining pins immediately if any indications are found. Modify the design by installing four 3/8 inch retaining pins by October 1, 1957.

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

Compliance Time

By October 1, 1957

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

Affected Aircraft

Twin Commander Aircraft LLC models 560A, 560E, and 680, serial numbers 231 through 559.

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

Source: Official FAA Source ↗

Retrieved: Apr 8, 2026

Rights: U.S. Government Public Domain

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.

View Official Source ↗ Find More ADs for Twin Commander Aircraft LLC 560-A

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