AD 64-07-01
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
Possible inflight electrical fire in the J6 electrical distribution panel due to heat generated by a loose terminal on a generator contactor.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove nylon terminal covers from specified circuit breakers and external power contactor; replace vinyl covered braid connections with No. 4 gauge high temperature wire jumpers (MIL-W-7139A, Type I, Class A or equivalent); replace capacitors with specified types; reroute wiring to auxiliary negative sequence relays separately; accomplish modifications per Boeing Service Bulletin No. 1720 or FAA-approved method.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 1,000 hours' time in service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Models 707 and 720 Series Aircraft
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Electrical Distribution Center
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_64-07-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 64-07-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Models 707 and 720 Series Aircraft Subject: Electrical Distribution Center Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/13/1964 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: 64-07-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 64-07-01 SUBJECT HEADING: BOEING Models 707 and 720 Series Aircraft ACTION: SUMMARY: DATES: Effective April 13, 1964. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 64-07-01 BOEING: Amdt. 702 Part 507 Federal Register March 11, 1964. Applies to All Models 707 and 720 Series Aircraft. Compliance required within the next 1,000 hours' time in service after the effective date of this AD, unless already accomplished. To eliminate possible inflight electrical fire in the J6 electrical distribution panel as a result of heat generated by a loose terminal on a generator contactor, modify the J6 electrical distribution center as follows: (a) Remove the nylon terminal covers from the generator and bus-tie circuit breakers 50086-001, -002 or -003 and external power contactor B102D or B102F. (b) Replace the vinyl covered braid connections BAC J40D-30-24 between each generator circuit breaker and bus-tie circuit breaker with No. 4 gauge high temperature wire jumpers manufactured from MIL-W-7139A, Type I, Class A wire, or equivalent. (c) Replace capacitors 28F345 with General Electric capacitors 49F2204 (pyranol) or equivalent. (d) Replace synchronizing bus radio noise filter capacitors CP53B1EF205K with Sprague Electric 121P20506T13 capacitors (dry metalized paper), or equivalent. (e) Reroute wiring to the auxiliary negative sequence relays separate from all other wires in the a.c. power shield. (f) Modifications (a) through (e) shall be accomplished in accordance with Paragraph 3, Modification Data of Boeing Service Bulletin No. 1720, or a method approved by FAA Engineering and Manufacturing Branch Western Region. (Boeing Service Bulletin No. 1720 covers this same subject.) This directive effective April 13, 1964. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_64-07-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 64-07-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Models 707 and 720 Series Aircraft Subject: Electrical Distribution Center Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/13/1964 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: 64-07-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 64-07-01 SUBJECT HEADING: BOEING Models 707 and 720 Series Aircraft ACTION: SUMMARY: DATES: Effective April 13, 1964. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 64-07-01 BOEING: Amdt. 702 Part 507 Federal Register March 11, 1964. Applies to All Models 707 and 720 Series Aircraft. Compliance required within the next 1,000 hours' time in service after the effective date of this AD, unless already accomplished. To eliminate possible inflight electrical fire in the J6 electrical distribution panel as a result of heat generated by a loose terminal on a generator contactor, modify the J6 electrical distribution center as follows: (a) Remove the nylon terminal covers from the generator and bus-tie circuit breakers 50086-001, -002 or -003 and external power contactor B102D or B102F. (b) Replace the vinyl covered braid connections BAC J40D-30-24 between each generator circuit breaker and bus-tie circuit breaker with No. 4 gauge high temperature wire jumpers manufactured from MIL-W-7139A, Type I, Class A wire, or equivalent. (c) Replace capacitors 28F345 with General Electric capacitors 49F2204 (pyranol) or equivalent. (d) Replace synchronizing bus radio noise filter capacitors CP53B1EF205K with Sprague Electric 121P20506T13 capacitors (dry metalized paper), or equivalent. (e) Reroute wiring to the auxiliary negative sequence relays separate from all other wires in the a.c. power shield. (f) Modifications (a) through (e) shall be accomplished in accordance with Paragraph 3, Modification Data of Boeing Service Bulletin No. 1720, or a method approved by FAA Engineering and Manufacturing Branch Western Region. (Boeing Service Bulletin No. 1720 covers this same subject.) This directive effective April 13, 1964. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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