AD 47-51-12

final rule
Data completeness: 60%

Airworthiness Directives; DOUGLAS C-47 Series Aircraft

AD Number
47-51-12
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Unknown
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft The Boeing Company DC3C-R-1830-90C Airworthiness Directives; DOUGLAS C-47 Series Aircraft
aircraft The Boeing Company DC3C-S1C3G Airworthiness Directives; DOUGLAS C-47 Series Aircraft
aircraft The Boeing Company DC3C-S4C4G Airworthiness Directives; DOUGLAS C-47 Series Aircraft

Unsafe Condition

Carburetor icing due to insufficient use of the carburetor alcohol system, improper accessory cowling and engine fire seal clearance exceeding 1/4-inch, or inadequate cable tension below 30 pounds for the hot air door operation.

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

Required Actions

Use the carburetor alcohol system, ensure accessory cowling and engine fire seal clearance does not exceed 1/4-inch, and rig the cable system for the hot air door to maintain 30 pounds tension.

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

Compliance Time

not later than March 1, 1948

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

Affected Aircraft

The Boeing Company DC3C-R-1830-90C, DC3C-S1C3G, DC3C-S4C4G models, converted C-47 Series Aircraft with Ram Non-ram (Hydraulic) Type Carburetor Airscoop.

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 The Boeing Company DC3C-R-1830-90C

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