AD 47-21-08

final rule
Data completeness: 60%

Airworthiness Directives; Navion Serial Numbers NAV-4-2 Through 411

AD Number
47-21-08
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Unknown
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft Sierra Hotel Aero, Inc. Navion (Army L-17A) Airworthiness Directives; Navion Serial Numbers NAV-4-2 Through 411

Unsafe Condition

Short circuits between the generator lower terminal and the fitting on the hydraulic pump inlet hose have been reported.

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

Required Actions

Install a self-threading insulator No. 145-54053 (or equivalent) on the generator lower terminal stud.

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

Compliance Time

not later than August 1, 1947

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

Affected Aircraft

Sierra Hotel Aero, Inc. Navion (Army L-17A) serial numbers NAV-4-2 Through 411

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 Sierra Hotel Aero, Inc. Navion (Army L-17A)

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