AD 75-11-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Alexandria Aircraft, LLC | 17-31 | Airworthiness Directives; Bellanca Model 17-31, 17-31TC, 17-31A and 1731ATC Airplanes |
| aircraft | Alexandria Aircraft, LLC | 17-31A | Airworthiness Directives; Bellanca Model 17-31, 17-31TC, 17-31A and 1731ATC Airplanes |
| aircraft | Alexandria Aircraft, LLC | 17-31ATC | Airworthiness Directives; Bellanca Model 17-31, 17-31TC, 17-31A and 1731ATC Airplanes |
| aircraft | Alexandria Aircraft, LLC | 17-31TC | Airworthiness Directives; Bellanca Model 17-31, 17-31TC, 17-31A and 1731ATC Airplanes |
Unsafe Condition
Failure of the check valve (P/N 19121-206) in the vapor return line could result in engine power failure due to fuel vapor lock.
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Required Actions
Remove the check valve, disassemble and remove the internal check ball, reassemble without the ball, remark the valve housing with a yellow stripe, reinstall in the vapor return line, and make log book entries. Procedures vary by model year with specific disassembly steps for models up to 1972, 1973, and 1974/1975.
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Compliance Time
within the next 25 hours time in service after the effective date of this AD
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Affected Aircraft
Bellanca Model 17-31 (S/N 32-1), 17-31TC (all serials), 17-31A (S/N 32-21 through 75-32-159 except S/N 32-25), and 17-31ATC (S/N 31004 through S/N 75-31116)
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Federal Register Abstract
Check Valve
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_75-11-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-11-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bellanca Model 17-31, 17-31TC, 17-31A and 1731ATC Airplanes Subject: Check Valve Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/25/1975 Make: Alexandria Aircraft, LLC Model: 17-31 | 17-31A | 17-31ATC | 17-31TC Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-11-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2242 AD NUMBER: 75-11-06 SUBJECT HEADING: Airworthiness Directives; Bellanca Model 17-31, 17-31TC, 17-31A and 1731ATC Airplanes ACTION: SUMMARY: DATES: Effective June 25, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-11-06 BELLANCA: Amendment 39-2209 as amended by Amendment 39-2242. Applies to the following airplanes: 17-31 : S/N 32-1 17-31TC : All serials 17-31A : S/N 32-21 through 75-32-159 except S/N 32-25 17-31ATC : S/N 31004 through S/N 75-31116 Compliance: Required within the next 25 hours time in service after the effective date of this AD. The airplane may be flown to a facility where the modification can be accomplished after the expiration of the 25 hours time in service after the effective date of the AD. To prevent possible engine power failure accomplish the following as appropriate: A. Models Up To But Not Including 1973 Models* The check valve (P/N 19121-206**) is located on the diagonal on the forward wing truss under R/H front seat; the following procedure is to be used. 1. Remove right front seat, lift up carpet and remove plywood cover. 2. Remove check valve. 3. Disassemble the check valve, remove the internal check ball and reassemble the valve without the internal check ball. Remove the Bellanca placard showing the valve as P/N 19121-206 and remark the valve housing with a yellow stripe through the AN part number. 4. Reinstall the valve in the vapor return line. 5. Make appropriate log book entries. B. 1973 Model Aircraft* The check valve (19121-206**) is located under right floorboard; the following procedure is to be used: 1. Remove: right front seat forward stop and seat, floor mat, right kick panel, right half of heel plate, metal cover over fuel selector, and right floorboard. 2. Remove check valve. 3. Disassemble the check valve, remove the internal check ball and reassemble the valve without the internal check ball. Remove the Bellanca placard showing the valve as P/N 19121-206 and remark the valve housing with a yellow stripe through the AN part number. 4. Reinstall the valve in the vapor return line. 5. Reverse Step 1 to complete operation. 6. Make appropriate log book entries. C. 1974 and 1975 Model Aircraft* The check valve (19121-206**) is located under right floorboard; the following procedure is to be used: 1. Remove: right front seat forward stop and seat, floor mat, right cabin heat fresh air deflector, seat adjuster mechanism, metal cover over fuel selector, and right floorboard. 2. Remove check valve. 3. Disassemble the check valve, remove the internal check ball and reassemble the valve without the internal check ball. Remove the Bellanca placard showing the valve as P/N 19121-206 and remark the valve housing with a yellow stripe through the AN part number. 4. Reinstall the valve in the vapor return line. 5. Reverse Step 1 to complete procedure. 6. Make appropriate log book entries. *Identify aircraft model year by referring to first two digits in serial number for 1973, 1974 and 1975 aircraft; aircraft serial numbers prior to 1973 were not coded to year. **The check valve is a small 13/16 inch diameter by 1 3/4 inch long (plus fitting) AN valve located in the vapor return line between the fuel selector and the firewall. The valve may be positively identified by noting the Bellanca placard rework number 19121-206 located after AN in lieu of the AN number. Amendment 39-2209 became effective May 22, 1975. This amendment 39-2242 becomes effective June 25, 1975. FOOTER:
Document Text
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AD Final Rules - DRS_75-11-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-11-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Bellanca Model 17-31, 17-31TC, 17-31A and 1731ATC Airplanes Subject: Check Valve Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/25/1975 Make: Alexandria Aircraft, LLC Model: 17-31 | 17-31A | 17-31ATC | 17-31TC 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: 75-11-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2242 AD NUMBER: 75-11-06 SUBJECT HEADING: Airworthiness Directives; Bellanca Model 17-31, 17-31TC, 17-31A and 1731ATC Airplanes ACTION: SUMMARY: DATES: Effective June 25, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-11-06 BELLANCA: Amendment 39-2209 as amended by Amendment 39-2242. Applies to the following airplanes: 17-31 : S/N 32-1 17-31TC : All serials 17-31A : S/N 32-21 through 75-32-159 except S/N 32-25 17-31ATC : S/N 31004 through S/N 75-31116 Compliance: Required within the next 25 hours time in service after the effective date of this AD. The airplane may be flown to a facility where the modification can be accomplished after the expiration of the 25 hours time in service after the effective date of the AD. To prevent possible engine power failure accomplish the following as appropriate: A. Models Up To But Not Including 1973 Models* The check valve (P/N 19121-206**) is located on the diagonal on the forward wing truss under R/H front seat; the following procedure is to be used. 1. Remove right front seat, lift up carpet and remove plywood cover. 2. Remove check valve. 3. Disassemble the check valve, remove the internal check ball and reassemble the valve without the internal check ball. Remove the Bellanca placard showing the valve as P/N 19121-206 and remark the valve housing with a yellow stripe through the AN part number. 4. Reinstall the valve in the vapor return line. 5. Make appropriate log book entries. B. 1973 Model Aircraft* The check valve (19121-206**) is located under right floorboard; the following procedure is to be used: 1. Remove: right front seat forward stop and seat, floor mat, right kick panel, right half of heel plate, metal cover over fuel selector, and right floorboard. 2. Remove check valve. 3. Disassemble the check valve, remove the internal check ball and reassemble the valve without the internal check ball. Remove the Bellanca placard showing the valve as P/N 19121-206 and remark the valve housing with a yellow stripe through the AN part number. 4. Reinstall the valve in the vapor return line. 5. Reverse Step 1 to complete operation. 6. Make appropriate log book entries. C. 1974 and 1975 Model Aircraft* The check valve (19121-206**) is located under right floorboard; the following procedure is to be used: 1. Remove: right front seat forward stop and seat, floor mat, right cabin heat fresh air deflector, seat adjuster mechanism, metal cover over fuel selector, and right floorboard. 2. Remove check valve. 3. Disassemble the check valve, remove the internal check ball and reassemble the valve without the internal check ball. Remove the Bellanca placard showing the valve as P/N 19121-206 and remark the valve housing with a yellow stripe through the AN part number. 4. Reinstall the valve in the vapor return line. 5. Reverse Step 1 to complete procedure. 6. Make appropriate log book entries. *Identify aircraft model year by referring to first two digits in serial number for 1973, 1974 and 1975 aircraft; aircraft serial numbers prior to 1973 were not coded to year. **The check valve is a small 13/16 inch diameter by 1 3/4 inch long (plus fitting) AN valve located in the vapor return line between the fuel selector and the firewall. The valve may be positively identified by noting the Bellanca placard rework number 19121-206 located after AN in lieu of the AN number. Amendment 39-2209 became effective May 22, 1975. This amendment 39-2242 becomes effective June 25, 1975. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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