AD 46-01-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | T-50 | Airworthiness Directives; CESSNA Model T-50 Airplanes |
Unsafe Condition
Improper flap chain operation, characterized by jumpy chain action, may lead to the chain jumping the idler and jamming due to incorrect chain tension or excessively worn sprockets or both.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect flap chain tension at the flap screw inspection opening, check sprockets for excessive wear (teeth 1/2 the thickness of the sprocket web), inspect chain guard for bending or wear-through, and replace cracked chain links. Replace sprockets and chain guard as needed, and adjust chain tension using the adjustable arm or idler. Chain replacement is recommended every 1,000 hours.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Cessna Model T-50 Aircraft as specified in Service Note 1 of AD-722-5.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Flap Chain
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_46-01-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 46-01-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Model T-50 Airplanes Subject: Flap Chain 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Date: Make: Cessna Aircraft Company Model: T-50 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 46-01-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 46-01-01 SUBJECT HEADING: Airworthiness Directives; CESSNA Model T-50 Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 46-01-01 CESSNA: (Was Service Note 1 of AD-722-5.) Applies to all T-50 Aircraft. Improper flap chain operation, characterized by jumpy chain action, may lead to the chain jumping the idler and jamming. Improper operation is probably due to incorrect chain tension or excessively worn sprockets or both. The chain tension can be checked at the flap screw inspection opening by pressing the chains together at a point approximately 4 inches inboard of the flap screw sprocket. The distance between the chains should not be less than 1/4 nor more than 3/4 inch. The chain tension may be adjusted by means of the adjustable arm or the idler. The sprockets are considered excessively worn and should be replaced when the teeth are 1/2 the thickness of the sprocket web. In addition, the chain guard on the idler should be checked to make certain that it has not been bent or worn through. Inspect all chain links for cracks and replace any links that are found cracked. It is recommended that the chain be replaced every 1,000 hours. (Cessna Service Bulletin No. 100 dated July 13, 1945, covers this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_46-01-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 46-01-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Model T-50 Airplanes Subject: Flap Chain 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: 46-01-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 46-01-01 SUBJECT HEADING: Airworthiness Directives; CESSNA Model T-50 Airplanes ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 46-01-01 CESSNA: (Was Service Note 1 of AD-722-5.) Applies to all T-50 Aircraft. Improper flap chain operation, characterized by jumpy chain action, may lead to the chain jumping the idler and jamming. Improper operation is probably due to incorrect chain tension or excessively worn sprockets or both. The chain tension can be checked at the flap screw inspection opening by pressing the chains together at a point approximately 4 inches inboard of the flap screw sprocket. The distance between the chains should not be less than 1/4 nor more than 3/4 inch. The chain tension may be adjusted by means of the adjustable arm or the idler. The sprockets are considered excessively worn and should be replaced when the teeth are 1/2 the thickness of the sprocket web. In addition, the chain guard on the idler should be checked to make certain that it has not been bent or worn through. Inspect all chain links for cracks and replace any links that are found cracked. It is recommended that the chain be replaced every 1,000 hours. (Cessna Service Bulletin No. 100 dated July 13, 1945, covers this same subject.) 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.