AD 55-03-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Kelowna Flightcraft R & D Ltd. | 340 | CONVAIR Model 340 Aircraft |
Unsafe Condition
AN 310-4 nut coming off of the AN 174-33 bolt that attaches the left-hand elevator servo tab idler to the structure, resulting in flutter of the elevator servo tab, subsequent failures at the elevator control system, and loss of elevator control.
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Required Actions
Inspect the control systems for the servo tab on the left elevator and right elevator trim tab on all 340 aircraft, including nuts, bolts, idlers, bellcranks, pushrods, and a general security check of all nuts and bolts.
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Compliance Time
As soon as practical but not later than the next 15 hours service
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Affected Aircraft
CONVAIR Model 340 Aircraft, all serial numbers
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Federal Register Abstract
Elevator Servo Tab
Applicability Source Text
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AD Final Rules - DRS_55-03-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 55-03-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CONVAIR Model 340 Aircraft Subject: Elevator Servo Tab Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Kelowna Flightcraft R & D Ltd. Model: 340 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 55-03-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 55-03-01 SUBJECT HEADING: CONVAIR Model 340 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 55-03-01 CONVAIR: Applies to All Model 340 Aircraft. Compliance required as indicated. A 340 was involved in a flight accident due to the AN 310-4 nut coming off of the AN 174-33 bolt that attaches the left-hand elevator servo tab idler to the structure resulting in flutter of the elevator servo tab, with subsequent failures at the elevator control system and loss of elevator control. As a precautionary measure, the following is required: As soon as practical but not later then the next 15 hours service, inspect the control systems for the servo tab on the left elevator and on the right elevator trim tab on all 340 aircraft. Inspection is to cover all nuts, bolts, idlers, bellcranks, pushrods and general security check of all nuts and bolts. FOOTER:
Document Text
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AD Final Rules - DRS_55-03-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 55-03-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: CONVAIR Model 340 Aircraft Subject: Elevator Servo Tab Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Kelowna Flightcraft R & D Ltd. Model: 340 Product Type: Aircraft Product Subtype: Large 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: 55-03-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 55-03-01 SUBJECT HEADING: CONVAIR Model 340 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 55-03-01 CONVAIR: Applies to All Model 340 Aircraft. Compliance required as indicated. A 340 was involved in a flight accident due to the AN 310-4 nut coming off of the AN 174-33 bolt that attaches the left-hand elevator servo tab idler to the structure resulting in flutter of the elevator servo tab, with subsequent failures at the elevator control system and loss of elevator control. As a precautionary measure, the following is required: As soon as practical but not later then the next 15 hours service, inspect the control systems for the servo tab on the left elevator and on the right elevator trim tab on all 340 aircraft. Inspection is to cover all nuts, bolts, idlers, bellcranks, pushrods and general security check of all nuts and bolts. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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