AD 67-22-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | 206A | Airworthiness Directives; Bell Model 206A Helicopters |
Unsafe Condition
Improperly wired electric fuel boost pumps may create a potentially explosive condition in the fuel tank due to lack of proper grounding.
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Required Actions
Before further flight, inspect the white wire connections of both fuel boost pumps to ensure they are connected to the aircraft system ground wire using specified methods. If grounding is not confirmed, correct connections using the Master Electrical Diagram. Within 25 hours' time in service, modify the fuel boost pump wiring per Bell Helicopter Company Service Letter Model 206A-No. 21, Revision A, or an approved equivalent method.
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Compliance Time
Before further flight and within the next 25 hours' time in service
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Affected Aircraft
Bell Helicopter Textron Canada Limited Model 206A Helicopters, Serial Numbers 4 through 20, 22 through 48, 50 through 56, 59, 61, and 63.
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Federal Register Abstract
Grounding of Fuel Boost Pumps
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_67-22-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 67-22-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 206A Helicopters Subject: Grounding of Fuel Boost Pumps Status: Current Citation: Federal Register: July 29, 1967 Citation Publish Date: 07/29/1967 Effective Date: 07/29/1967 Make: Bell Helicopter Textron Canada Limited Model: 206A Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 67-22-02 CITATION: [Federal Register: July 29, 1967] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-452 AD NUMBER: 67-22-02 SUBJECT HEADING: Airworthiness Directives; Bell Model 206A Helicopters ACTION: SUMMARY: DATES: Effective July 29, 1967. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 67-22-02 BELL: Amdt. No. 39-452. Part 39, Federal Register July 29, 1967. Applies to Model 206A Helicopters, Serial Numbers 4 through 20, 22 through 48, 50 through 56, 59, 61, and 63. Compliance required as indicated below after the effective date of this airworthiness directive, unless already accomplished. To assure proper grounding of both fuel boost pumps and prevent a potentially explosive condition in the fuel tank due to improperly wired electric fuel boost pumps, accomplish the following inspection and modification: (a) Before further flight, determine by either of the following methods that the white wire from each fuel boost pump is connected to the aircraft system ground wire: (1) If the wire identification is legible, by reference to the Master Electrical Wiring Diagram in the Model 206A Maintenance and Overhaul Manual, confirm that helicopter system wires numbered Q2A18N (to the Forward Boost Pump), and Q4A18N (to the Aft Boost Pump) are connected to the white wire from the corresponding boost pump. (2) If the wire identification is not legible, turn all switches off and disconnect each fuel boost pump white wire from the aircraft system wire. Check each aircraft system wire thus exposed for proper grounding using an ohmmeter or continuity checking device. If the grounding is confirmed by either of the above methods, disconnected wires may be reconnected and the helicopter returned to service for not more than 25 hours before the modification required by subparagraph 2 below is accomplished. If grounding is not confirmed by either of the above methods, the fuel pump leads may have been reversed. Use the Master Electrical Diagram in the Maintenance and Overhaul Manual to determine correct connections, and connect the pumps to the aircraft system accordingly. The helicopter may then be returned to service for not more than 25 hours' operation before the modification required by subparagraph 2 below is accomplished. (b) Within the next 25 hours' time in service, modify the fuel boost pump wiring in accordance with Part B, Bell Helicopter Company Service Letter, Model 206A-No. 21, Revision A, dated July 18, 1967, or an equivalent method approved by the Director, Southwest Region, Federal Aviation Administration. This amendment effective on July 29, 1967. FOOTER:
Document Text
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AD Final Rules - DRS_67-22-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 67-22-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bell Model 206A Helicopters Subject: Grounding of Fuel Boost Pumps Status: Current Citation: Federal Register: July 29, 1967 Citation Publish Date: 07/29/1967 Effective Date: 07/29/1967 Make: Bell Helicopter Textron Canada Limited Model: 206A Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 67-22-02 CITATION: [Federal Register: July 29, 1967] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-452 AD NUMBER: 67-22-02 SUBJECT HEADING: Airworthiness Directives; Bell Model 206A Helicopters ACTION: SUMMARY: DATES: Effective July 29, 1967. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 67-22-02 BELL: Amdt. No. 39-452. Part 39, Federal Register July 29, 1967. Applies to Model 206A Helicopters, Serial Numbers 4 through 20, 22 through 48, 50 through 56, 59, 61, and 63. Compliance required as indicated below after the effective date of this airworthiness directive, unless already accomplished. To assure proper grounding of both fuel boost pumps and prevent a potentially explosive condition in the fuel tank due to improperly wired electric fuel boost pumps, accomplish the following inspection and modification: (a) Before further flight, determine by either of the following methods that the white wire from each fuel boost pump is connected to the aircraft system ground wire: (1) If the wire identification is legible, by reference to the Master Electrical Wiring Diagram in the Model 206A Maintenance and Overhaul Manual, confirm that helicopter system wires numbered Q2A18N (to the Forward Boost Pump), and Q4A18N (to the Aft Boost Pump) are connected to the white wire from the corresponding boost pump. (2) If the wire identification is not legible, turn all switches off and disconnect each fuel boost pump white wire from the aircraft system wire. Check each aircraft system wire thus exposed for proper grounding using an ohmmeter or continuity checking device. If the grounding is confirmed by either of the above methods, disconnected wires may be reconnected and the helicopter returned to service for not more than 25 hours before the modification required by subparagraph 2 below is accomplished. If grounding is not confirmed by either of the above methods, the fuel pump leads may have been reversed. Use the Master Electrical Diagram in the Maintenance and Overhaul Manual to determine correct connections, and connect the pumps to the aircraft system accordingly. The helicopter may then be returned to service for not more than 25 hours' operation before the modification required by subparagraph 2 below is accomplished. (b) Within the next 25 hours' time in service, modify the fuel boost pump wiring in accordance with Part B, Bell Helicopter Company Service Letter, Model 206A-No. 21, Revision A, dated July 18, 1967, or an equivalent method approved by the Director, Southwest Region, Federal Aviation Administration. This amendment effective on July 29, 1967. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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