AD 60-20-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | 188A | LOCKHEED Model 188 Aircraft |
| aircraft | Lockheed Martin Corporation | 188C | LOCKHEED Model 188 Aircraft |
Unsafe Condition
Leaking lavatory tank ground drain valves permit drainage to the exterior surface of the aircraft in flight, resulting in ice formation which can strike the stabilizer and pose a hazard to aircraft in flight and persons on the ground.
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Required Actions
Modify lavatory tank ground drain valves to incorporate LAC seal No. 838228-1 or equivalent, as covered by LAC 88/SB-407.
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Compliance Time
next 300 hours' time in service after October 28, 1960
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Affected Aircraft
Lockheed Model 188 Aircraft, serial numbers 1002, 1004 through 1102, 1104 through 1126, and 2001 through 2015
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Federal Register Abstract
Lavatory Drains
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_60-20-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 60-20-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 188 Aircraft Subject: Lavatory Drains Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/28/1960 Make: Lockheed Martin Corporation Model: 188A | 188C Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 60-20-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 60-20-04 SUBJECT HEADING: LOCKHEED Model 188 Aircraft ACTION: SUMMARY: DATES: Effective October 28, 1960. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 60-20-04 LOCKHEED: Amdt. 203 Part 507 Federal Register September 28, 1960. Applies to 188 Aircraft Serial Numbers 1002, 1004 Through 1102, 1104 Through 1126, and 2001 Through 2015. Compliance required by the next 300 hours' time in service after October 28, 1960. Leaking lavatory tank ground drain valves have permitted drainage to the exterior surface of the aircraft in flight, resulting in ice formation which came off and struck the stabilizer. Since such ice formation is hazardous to aircraft in flight and to persons on the ground, all lavatory tank ground drain valves must be modified to incorporate LAC seal No. 838228-1 or equivalent. (LAC 88/SB-407 covers the intent of this change.) This directive effective October 28, 1960. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_60-20-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 60-20-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: LOCKHEED Model 188 Aircraft Subject: Lavatory Drains Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/28/1960 Make: Lockheed Martin Corporation Model: 188A | 188C 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: 60-20-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 60-20-04 SUBJECT HEADING: LOCKHEED Model 188 Aircraft ACTION: SUMMARY: DATES: Effective October 28, 1960. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 60-20-04 LOCKHEED: Amdt. 203 Part 507 Federal Register September 28, 1960. Applies to 188 Aircraft Serial Numbers 1002, 1004 Through 1102, 1104 Through 1126, and 2001 Through 2015. Compliance required by the next 300 hours' time in service after October 28, 1960. Leaking lavatory tank ground drain valves have permitted drainage to the exterior surface of the aircraft in flight, resulting in ice formation which came off and struck the stabilizer. Since such ice formation is hazardous to aircraft in flight and to persons on the ground, all lavatory tank ground drain valves must be modified to incorporate LAC seal No. 838228-1 or equivalent. (LAC 88/SB-407 covers the intent of this change.) This directive effective October 28, 1960. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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