AD 74-15-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | American Champion Aircraft Corp. | 8GCBC | Airworthiness Directives; Bellanca Aircraft Corporation Model 8GCBC Aircraft |
Unsafe Condition
Improper indexing of the propeller to the crankshaft flange may cause bushing shoulders to be misaligned, leading to potential damage or failure of the propeller mounting components.
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Required Actions
Verify propeller indexing to crankshaft flange by removing upper cowling and examining bushing shoulders. If misaligned, remove propeller and spacer, inspect parts for damage, replace as necessary, and reassemble ensuring proper indexing and torque bolts to 660-780 inch-pounds.
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Compliance Time
Before further flight
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Affected Aircraft
Bellanca Aircraft Corporation Model 8GCBC aircraft, Serial Numbers 2-74 to 62-74.
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Federal Register Abstract
Propeller Mounting
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_74-15-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-15-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bellanca Aircraft Corporation Model 8GCBC Aircraft Subject: Propeller Mounting Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/26/1974 Make: American Champion Aircraft Corp. Model: 8GCBC Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 74-15-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1901 AD NUMBER: 74-15-07 SUBJECT HEADING: Airworthiness Directives; Bellanca Aircraft Corporation Model 8GCBC Aircraft ACTION: SUMMARY: DATES: Effective July 26, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-15-07 BELLANCA AIRCRAFT CORPORATION: Amendment 39-1901. Applies to Bellanca Models 8GCBC aircraft Serial Numbers 2-74 to an including 62-74. Before further flight, verify that the propeller is properly indexed to the crankshaft flange. This can be accomplished by removing the upper cowling and examining the aft face of the crankshaft flange to determine if the shoulders of all six bushings are seated upon the rear face of flange. If incorrectly indexed, two bushing shoulders will be approximately 1/16 inch off flange surface. If incorrect, propeller and spacer must be removed and all parts inspected for damage and replaced as necessary. If undamaged, replace spacer and propeller, assuring proper indexing to crank flange and torque six bolts to 660-780 inch pounds. This amendment is effective July 26, 1974, and was effective July 2, 1974, for all recipients of the telegram dated July 2, 1974, which contained this amendment. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_74-15-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 74-15-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bellanca Aircraft Corporation Model 8GCBC Aircraft Subject: Propeller Mounting Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/26/1974 Make: American Champion Aircraft Corp. Model: 8GCBC 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: 74-15-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1901 AD NUMBER: 74-15-07 SUBJECT HEADING: Airworthiness Directives; Bellanca Aircraft Corporation Model 8GCBC Aircraft ACTION: SUMMARY: DATES: Effective July 26, 1974. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 74-15-07 BELLANCA AIRCRAFT CORPORATION: Amendment 39-1901. Applies to Bellanca Models 8GCBC aircraft Serial Numbers 2-74 to an including 62-74. Before further flight, verify that the propeller is properly indexed to the crankshaft flange. This can be accomplished by removing the upper cowling and examining the aft face of the crankshaft flange to determine if the shoulders of all six bushings are seated upon the rear face of flange. If incorrectly indexed, two bushing shoulders will be approximately 1/16 inch off flange surface. If incorrect, propeller and spacer must be removed and all parts inspected for damage and replaced as necessary. If undamaged, replace spacer and propeller, assuring proper indexing to crank flange and torque six bolts to 660-780 inch pounds. This amendment is effective July 26, 1974, and was effective July 2, 1974, for all recipients of the telegram dated July 2, 1974, which contained this amendment. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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