AD 48-05-01
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC3-G102 | Airworthiness Directives; DOUGLAS DC3 Aircraft |
| aircraft | The Boeing Company | DC3-G102A | Airworthiness Directives; DOUGLAS DC3 Aircraft |
| aircraft | The Boeing Company | DC3-G103A | Airworthiness Directives; DOUGLAS DC3 Aircraft |
| aircraft | The Boeing Company | DC3-G202A | Airworthiness Directives; DOUGLAS DC3 Aircraft |
| aircraft | The Boeing Company | DC3A-S1C3G | Airworthiness Directives; DOUGLAS DC3 Aircraft |
| aircraft | The Boeing Company | DC3A-S1CG | Airworthiness Directives; DOUGLAS DC3 Aircraft |
| aircraft | The Boeing Company | DC3A-S4C4G | Airworthiness Directives; DOUGLAS DC3 Aircraft |
| aircraft | The Boeing Company | DC3A-SC3G | Airworthiness Directives; DOUGLAS DC3 Aircraft |
| aircraft | The Boeing Company | DC3A-SCG | Airworthiness Directives; DOUGLAS DC3 Aircraft |
| aircraft | The Boeing Company | DC3C-R-1830-90C | Airworthiness Directives; DOUGLAS DC3 Aircraft |
| aircraft | The Boeing Company | DC3C-S1C3G | Airworthiness Directives; DOUGLAS DC3 Aircraft |
| aircraft | The Boeing Company | DC3C-S4C4G | Airworthiness Directives; DOUGLAS DC3 Aircraft |
| aircraft | The Boeing Company | DC3C-SC3G | Airworthiness Directives; DOUGLAS DC3 Aircraft |
| aircraft | The Boeing Company | DC3D-R-1830-90C | Airworthiness Directives; DOUGLAS DC3 Aircraft |
Unsafe Condition
Leakage in the oil shutoff valves due to 'O' rings not capable of withstanding operating temperatures.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the present 'O' rings in the oil shutoff valves with H222-90 high temperature material or AMS-3228B material.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
at first engine change after March 1, 1948, but not later than May 1, 1948
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Douglas DC3 Aircraft equipped with Pacific Aviation Oil Shutoff Valves.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Oil Shutoff Valve 'O' Rings
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_48-05-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-05-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS DC3 Aircraft Subject: Oil Shutoff Valve 'O' Rings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: DC3-G102 | DC3-G102A | DC3-G103A | DC3-G202A | DC3A-S1C3G | DC3A-S1CG | DC3A-S4C4G | DC3A-SC3G | DC3...Show more 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: 48-05-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-05-01 SUBJECT HEADING: Airworthiness Directives; DOUGLAS DC3 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-05-01 DOUGLAS: Applies to All DC3 Aircraft Equipped With Pacific Aviation Oil Shutoff Valves. Compliance required at first engine change after March 1, 1948, but not later than May 1, 1948. Replace the present "O" rings in the oil shutoff valves with rings of H222-90 high temperature material or AMS-3228B material. There has been reported leakage attributed to the fact that the material in the "O" rings is not capable of withstanding the operating temperature of the oil. (Douglas Service Bulletin DC3 No. 256 covers this same subject.) FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_48-05-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-05-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS DC3 Aircraft Subject: Oil Shutoff Valve 'O' Rings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: DC3-G102 | DC3-G102A | DC3-G103A | DC3-G202A | DC3A-S1C3G | DC3A-S1CG | DC3A-S4C4G | DC3A-SC3G | DC3...Show more 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: 48-05-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-05-01 SUBJECT HEADING: Airworthiness Directives; DOUGLAS DC3 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-05-01 DOUGLAS: Applies to All DC3 Aircraft Equipped With Pacific Aviation Oil Shutoff Valves. Compliance required at first engine change after March 1, 1948, but not later than May 1, 1948. Replace the present "O" rings in the oil shutoff valves with rings of H222-90 high temperature material or AMS-3228B material. There has been reported leakage attributed to the fact that the material in the "O" rings is not capable of withstanding the operating temperature of the oil. (Douglas Service Bulletin DC3 No. 256 covers this same subject.) FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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