AD 62-12-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-100 Long Body | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-100B Long Body | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-100B Short Body | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-200 | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-300 Series | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-300B Series | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-300C Series | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 707-400 Series | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 720 Series | BOEING Models 707 and 720 Series Aircraft |
| aircraft | The Boeing Company | 720B Series | BOEING Models 707 and 720 Series Aircraft |
Unsafe Condition
Fires originating in the electrical system of the d.c. type toilet flushing motor due to moisture exposure and prolonged d.c. voltage exposure.
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Required Actions
Rework the toilet motor electrical circuit by: (a) modifying timer wiring to apply voltage only during flushing, (b) relocating the connector to a moisture-protected bracket, (c) improving moisture seals with trimmed shielding and thermo fit sleeving, and (d) replacing potting compound with resilient inserts, grommets, and cable clamps.
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Compliance Time
Within 360 hours' time in service for paragraph (a) and 1,000 hours' time in service for paragraphs (b), (c), and (d) after the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Models 707 and 720 Series Aircraft with DC type toilet flushing motor installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Toilet Motor Electrical Circuit
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_62-12-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 62-12-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Models 707 and 720 Series Aircraft Subject: Toilet Motor Electrical Circuit Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/23/1962 Make: The Boeing Company Model: 707-100 Long Body | 707-100B Long Body | 707-100B Short Body | 707-200 | 707-300 Series | 707-300B S...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: 62-12-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 62-12-01 SUBJECT HEADING: BOEING Models 707 and 720 Series Aircraft ACTION: SUMMARY: DATES: Effective May 23, 1962. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 62-12-01 BOEING: Amdt. 441 Part 507 Federal Register May 23, 1962. Applies to All Models 707 and 720 Series Aircraft With DC Type Toilet Flushing Motor Installed. Compliance required as indicated. There have been several cases of fires originating in the electrical system of the d.c. type toilet flushing motor. To eliminate this unsafe condition, rework of the toilet motor electrical circuit and added protection against moisture entering the circuit components in the toilet area are required. Within the next 360 hours' time in service for paragraph (a) and 1,000 hours' time in service for paragraphs (b), (c), and (d) after the effective date of this AD, unless already accomplished, the following shall be accomplished in accordance with Modification Instructions of Monogram Precision Industries' Service Bulletin No. 35 BAC, dated February 22, 1962, or an FAA approved equivalent. (a) Reduce the exposure of the system to d.c. voltage by changing the wiring inside the timer so that voltage is applied to the flushing motor during the flushing operation only. (b) Increase the protection from moisture of the connector attached to the pigtail of the flushing motor by moving the connector from the bracket on the flushing motor to a bracket mounted behind the vertical shroud support. (c) Provide an improved moisture seal where the wires enter the flushing motor by trimming back the shielding and installing thermo fit sleeving over the wires, and repotting. (d) Reduce the susceptibility of moisture entering connectors by replacing the potting compound of the connectors attached to the harness and to the motor pigtail with resilient inserts and grommets and supporting the wires with cable clamps attached to the connectors. (Monogram Precision Industries' Service Bulletin No. 35 BAC, covers this same subject.) This directive effective May 23, 1962. FOOTER:
Document Text
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AD Final Rules - DRS_62-12-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 62-12-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Models 707 and 720 Series Aircraft Subject: Toilet Motor Electrical Circuit Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/23/1962 Make: The Boeing Company Model: 707-100 Long Body | 707-100B Long Body | 707-100B Short Body | 707-200 | 707-300 Series | 707-300B S...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: 62-12-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 62-12-01 SUBJECT HEADING: BOEING Models 707 and 720 Series Aircraft ACTION: SUMMARY: DATES: Effective May 23, 1962. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 62-12-01 BOEING: Amdt. 441 Part 507 Federal Register May 23, 1962. Applies to All Models 707 and 720 Series Aircraft With DC Type Toilet Flushing Motor Installed. Compliance required as indicated. There have been several cases of fires originating in the electrical system of the d.c. type toilet flushing motor. To eliminate this unsafe condition, rework of the toilet motor electrical circuit and added protection against moisture entering the circuit components in the toilet area are required. Within the next 360 hours' time in service for paragraph (a) and 1,000 hours' time in service for paragraphs (b), (c), and (d) after the effective date of this AD, unless already accomplished, the following shall be accomplished in accordance with Modification Instructions of Monogram Precision Industries' Service Bulletin No. 35 BAC, dated February 22, 1962, or an FAA approved equivalent. (a) Reduce the exposure of the system to d.c. voltage by changing the wiring inside the timer so that voltage is applied to the flushing motor during the flushing operation only. (b) Increase the protection from moisture of the connector attached to the pigtail of the flushing motor by moving the connector from the bracket on the flushing motor to a bracket mounted behind the vertical shroud support. (c) Provide an improved moisture seal where the wires enter the flushing motor by trimming back the shielding and installing thermo fit sleeving over the wires, and repotting. (d) Reduce the susceptibility of moisture entering connectors by replacing the potting compound of the connectors attached to the harness and to the motor pigtail with resilient inserts and grommets and supporting the wires with cable clamps attached to the connectors. (Monogram Precision Industries' Service Bulletin No. 35 BAC, covers this same subject.) This directive effective May 23, 1962. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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