AD 47-30-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | T-50 | Airworthiness Directives; CESSNA Model UC-78 and AT-17 Series Airplanes |
Unsafe Condition
Incorrect identification of 5,700-pound gross weight wings (UC-78 and AT-17 series) could result in certification above 5,100 pounds gross weight, leading to structural failure due to insufficient reinforcement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect wings of 5,400- and 5,700-pound gross weight airplanes to verify proper identification as 5,700-pound wings by checking laminated birch plywood reinforcement on rear spar, plywood flanges on wing ribs, and diagonal dimensions in nose ribs. Wings not identifiable must not be certified above 5,100 pounds gross weight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to October 15, 1947
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Cessna Model UC-78 and AT-17 Series airplanes
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Wing Inspection for Identification
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_47-30-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-30-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Model UC-78 and AT-17 Series Airplanes Subject: Wing Inspection for Identification Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Cessna Aircraft Company Model: T-50 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-30-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-30-03 SUBJECT HEADING: Airworthiness Directives; CESSNA Model UC-78 and AT-17 Series Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-30-03 CESSNA: (Was Mandatory Note 13 of AD-722-5.) Applies to All UC-78 and AT-17 Series Airplanes. Compliance required prior to October 15, 1947. Inspect the wing of 5,400- and 5,700-pound gross weight airplanes to determine that the wing has been properly identified as a 5,700-pound wing. The 5,700-pound wing has the following salient identification features: (a) Laminated (8 to 10 ply) birch plywood reinforcement on the rear face of the rear spar (instead of spruce block found on the 5,100-pound wing) extending continuously through the center section from nacelle to nacelle. Ends of this plywood plate are scarfed out just inboard of each nacelle bearing block. (b) Continuous plywood flanges 1 to 1 1/2 x 1/16-inch are found on both sides of the lower cap strips of wing ribs between the front and rear spars on 5,700-pound wings. 5/16 x 5/16 found in the 5,100-pound wing. (c) The diagonal in nose ribs of the 5,700-pound wing is 5/16 x 7/16 instead of 5/16 x 5/16 found in the 5,100-pound wing. (Wings which cannot be identified as outlined above are not eligible for certification above 5,100 pounds gross weight.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_47-30-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 47-30-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Model UC-78 and AT-17 Series Airplanes Subject: Wing Inspection for Identification Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Cessna Aircraft Company Model: T-50 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 47-30-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 47-30-03 SUBJECT HEADING: Airworthiness Directives; CESSNA Model UC-78 and AT-17 Series Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 47-30-03 CESSNA: (Was Mandatory Note 13 of AD-722-5.) Applies to All UC-78 and AT-17 Series Airplanes. Compliance required prior to October 15, 1947. Inspect the wing of 5,400- and 5,700-pound gross weight airplanes to determine that the wing has been properly identified as a 5,700-pound wing. The 5,700-pound wing has the following salient identification features: (a) Laminated (8 to 10 ply) birch plywood reinforcement on the rear face of the rear spar (instead of spruce block found on the 5,100-pound wing) extending continuously through the center section from nacelle to nacelle. Ends of this plywood plate are scarfed out just inboard of each nacelle bearing block. (b) Continuous plywood flanges 1 to 1 1/2 x 1/16-inch are found on both sides of the lower cap strips of wing ribs between the front and rear spars on 5,700-pound wings. 5/16 x 5/16 found in the 5,100-pound wing. (c) The diagonal in nose ribs of the 5,700-pound wing is 5/16 x 7/16 instead of 5/16 x 5/16 found in the 5,100-pound wing. (Wings which cannot be identified as outlined above are not eligible for certification above 5,100 pounds gross weight.) FOOTER:
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.
Related Airworthiness Directives
51-18-01
final ruleAirworthiness Directives; CESSNA Model T-50 Airplanes
Unsafe Condition: The unsafe condition could occur if the elevator trim tab control system is not properly adjusted, leading to improper elevator trim tab operation and possible loss of control during flight.
51-25-01
final ruleAirworthiness Directives; CESSNA Model T-50 Airplanes
Unsafe Condition: Trapping of water in the horizontal stabilizer forward of the rear spar may result in glue line deterioration between laminations.
53-18-01
final ruleAirworthiness Directives; CESSNA Model T-50 Airplanes
Unsafe Condition: Failure of the outer bearing in the Goodrich Model 751A/M, G-3-49A, 7.50-10 main gear assembly, which can result in loss of a wheel.
47-30-02
final ruleAirworthiness Directives; CESSNA Model T-50 Airplanes
Unsafe Condition: The absence of reinforcing doubler plates on the ends of brake pedal links, P/N 53046, could result in failure of the brake pedal links due to overstress at the fitting holes.