AD 55-26-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | P. V. Shields | A-26B (Army) | Airworthiness Directives; DOUGLAS A-26 Aircraft |
| aircraft | P. V. Shields | A-26C (Army) | Airworthiness Directives; DOUGLAS A-26 Aircraft |
Unsafe Condition
Explosion in the air due to potential fuel tank fumes ignition in the rear fuselage fuel tank compartment.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install fume tight closure and sealing of bulkheads at Stations 332 and 369 with tight fitting grommets or fairleads around control cables. Remove and relocate electrical equipment and oxygen tanks from the tank compartment. Provide insulation around electrical terminals, ventilation airscoop and exit vent, and drain holes in the compartment bottom. Ensure fuel tank components are airworthy.
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Compliance Time
prior to actuation of fuselage fuel tank
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Affected Aircraft
Douglas A-26B (Army) and A-26C (Army) aircraft with rear fuselage fuel tank installation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Fuselage Fuel Tank Modification
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_55-26-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 55-26-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS A-26 Aircraft Subject: Fuselage Fuel Tank Modification Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: P. V. Shields Model: A-26B (Army) | A-26C (Army) Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 55-26-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 55-26-01 SUBJECT HEADING: Airworthiness Directives; DOUGLAS A-26 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 55-26-01 DOUGLAS: Applies to A-26 Aircraft Having Rear Fuselage Fuel Tank Installation. To be accomplished prior to actuation of fuselage fuel tank. Because of an explosion in the air and loss of aircraft, instructions were issued October 12, 1955, to deactivate the rear fuselage fuel tank on the above aircraft until further notice. If the following modification, or its equivalent, is accomplished this fuel tank may be reactivated: 1. Provide fume tight closure and sealing of bulkheads at Stations 332 and 369. This should include tight fitting grommets or fairleads around control cables, or other members passing through bulkhead. 2. Remove all electrical equipment and oxygen tanks, if installed, from the tank compartment. Relocate elsewhere in the airplane as required. 3. Provide insulation around any electrical terminals in tank bay. 4. Provide adequate ventilation airscoop on top or side of tank compartment and exit vent on bottom. Provide drain holes in bottom of compartment to assure complete fuel drainage. 5. Ascertain that fuel tank, filler, cap, scupper, drain, and attaching lines and fittings are airworthy. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_55-26-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 55-26-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS A-26 Aircraft Subject: Fuselage Fuel Tank Modification Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: P. V. Shields Model: A-26B (Army) | A-26C (Army) 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: 55-26-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 55-26-01 SUBJECT HEADING: Airworthiness Directives; DOUGLAS A-26 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 55-26-01 DOUGLAS: Applies to A-26 Aircraft Having Rear Fuselage Fuel Tank Installation. To be accomplished prior to actuation of fuselage fuel tank. Because of an explosion in the air and loss of aircraft, instructions were issued October 12, 1955, to deactivate the rear fuselage fuel tank on the above aircraft until further notice. If the following modification, or its equivalent, is accomplished this fuel tank may be reactivated: 1. Provide fume tight closure and sealing of bulkheads at Stations 332 and 369. This should include tight fitting grommets or fairleads around control cables, or other members passing through bulkhead. 2. Remove all electrical equipment and oxygen tanks, if installed, from the tank compartment. Relocate elsewhere in the airplane as required. 3. Provide insulation around any electrical terminals in tank bay. 4. Provide adequate ventilation airscoop on top or side of tank compartment and exit vent on bottom. Provide drain holes in bottom of compartment to assure complete fuel drainage. 5. Ascertain that fuel tank, filler, cap, scupper, drain, and attaching lines and fittings are airworthy. 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.
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