AD 66-06-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-200 | BOEING Model 707-200 and -300 Series Airplanes |
| aircraft | The Boeing Company | 707-300 Series | BOEING Model 707-200 and -300 Series Airplanes |
| aircraft | The Boeing Company | 707-300B Series | BOEING Model 707-200 and -300 Series Airplanes |
| aircraft | The Boeing Company | 707-300C Series | BOEING Model 707-200 and -300 Series Airplanes |
Unsafe Condition
Loose B-nut on the thrust reverser P(s4) lines due to stainless steel 17-4 PH CRES sleeves.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace P(s4) tube assemblies with case-hardened 316 CRES sleeves per Boeing Service Bulletin 2228, or first use nickel/silver plated carbon steel sleeves then later replace with 316 CRES sleeves as per Boeing Service Letter 6-7161-4-8966 and subsequent Service Bulletin.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 1,200 hours' time in service after February 22, 1966, and for the second step in option (b), within the next 3,000 hours' time in service after the same date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 707-200 and -300 Series airplanes equipped with Pratt & Whitney JT4 engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Thrust Reverser
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_66-06-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-06-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 707-200 and -300 Series Airplanes Subject: Thrust Reverser Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 02/22/1966 Make: The Boeing Company Model: 707-200 | 707-300 Series | 707-300B Series | 707-300C Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 66-06-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-197 AD NUMBER: 66-06-01 SUBJECT HEADING: BOEING Model 707-200 and -300 Series Airplanes ACTION: SUMMARY: DATES: Effective February 22, 1966. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-06-01 BOEING: Amdt. 39-197 Part 39 Federal Register February 22, 1966. Applies to Model 707-200 and -300 Series Airplanes Equipped with Pratt & Whitney JT4 Engines. Compliance required as indicated, unless already accomplished. To prevent loose B-nut on the thrust reverser P(s4) lines, accomplish one of the following or an equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region. (a) Within the next 1,200 hours' time in service after the effective date of this AD, replace P(s4) tube assemblies (located between the P(s4) engine bleed port and the thrust reverser directional control valve) that incorporate stainless steel 17-4 PH CRES sleeves with tube assemblies that incorporate case-hardened 316 CRES sleeves in accordance with Boeing Service Bulletin 2228, dated August 9, 1965, or later FAA-approved revision; or (b) Within the next 1,200 hours' time in service after the effective date of this AD, replace P(s4) tube assemblies (located between the P(s4) engine bleed port and the thrust reverse directional control valve) that incorporate stainless steel 17-4 PH CRES sleeves with tube assemblies that incorporate nickel plated carbon steel sleeves or silver plated carbon steel sleeves in accordance with Boeing Service Letter 6-7161-4-8966, dated May 11, 1965, and within the next 3,000 hours' time in service after the effective date of this AD, replace the assemblies that incorporate nickel or silver plated carbon steel sleeves with tube assemblies that incorporate case- hardened 316 CRES sleeves in accordance with Boeing Service Bulletin 2228, dated August 9, 1965, or later FAA-approved revision. This supersedes AD 65-25-01. This directive effective February 22, 1966. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_66-06-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-06-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 707-200 and -300 Series Airplanes Subject: Thrust Reverser Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 02/22/1966 Make: The Boeing Company Model: 707-200 | 707-300 Series | 707-300B Series | 707-300C Series 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: 66-06-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-197 AD NUMBER: 66-06-01 SUBJECT HEADING: BOEING Model 707-200 and -300 Series Airplanes ACTION: SUMMARY: DATES: Effective February 22, 1966. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-06-01 BOEING: Amdt. 39-197 Part 39 Federal Register February 22, 1966. Applies to Model 707-200 and -300 Series Airplanes Equipped with Pratt & Whitney JT4 Engines. Compliance required as indicated, unless already accomplished. To prevent loose B-nut on the thrust reverser P(s4) lines, accomplish one of the following or an equivalent approved by the Chief, Aircraft Engineering Division, FAA Western Region. (a) Within the next 1,200 hours' time in service after the effective date of this AD, replace P(s4) tube assemblies (located between the P(s4) engine bleed port and the thrust reverser directional control valve) that incorporate stainless steel 17-4 PH CRES sleeves with tube assemblies that incorporate case-hardened 316 CRES sleeves in accordance with Boeing Service Bulletin 2228, dated August 9, 1965, or later FAA-approved revision; or (b) Within the next 1,200 hours' time in service after the effective date of this AD, replace P(s4) tube assemblies (located between the P(s4) engine bleed port and the thrust reverse directional control valve) that incorporate stainless steel 17-4 PH CRES sleeves with tube assemblies that incorporate nickel plated carbon steel sleeves or silver plated carbon steel sleeves in accordance with Boeing Service Letter 6-7161-4-8966, dated May 11, 1965, and within the next 3,000 hours' time in service after the effective date of this AD, replace the assemblies that incorporate nickel or silver plated carbon steel sleeves with tube assemblies that incorporate case- hardened 316 CRES sleeves in accordance with Boeing Service Bulletin 2228, dated August 9, 1965, or later FAA-approved revision. This supersedes AD 65-25-01. This directive effective February 22, 1966. 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.
Related Airworthiness Directives
2023-12-15
final ruleAirworthiness Directives; The Boeing Company Airplanes
Unsafe Condition: 5G C-Band interference can cause radio altimeters to not perform their intended function, resulting in increased flightcrew workload while on approach with the flight director, autothrottle, or aut...
2023-10-02
final ruleAirworthiness Directives; Transport and Commuter Category Airplanes
Unsafe Condition: Radio altimeter anomalies that are undetected by the automation or pilot, particularly close to the ground (e.g., landing flare), could lead to loss of continued safe flight and landing. Additional...
2022-25-01 Recurring
final ruleAirworthiness Directives; The Boeing Company Airplanes
Unsafe Condition: cracking in fastener holes at the center wing box and at certain positions of the rear spar and lower skin
2020-03-11
final ruleAirworthiness Directives; The Boeing Company Airplanes
Unsafe Condition: The potential for a fuel tank ignition source to occur from the FQIS due to its design architecture, component design details, and installation design details.
