AD 90-09-10
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Texas Instruments | Circuit Breakers | Airworthiness Directives; TEXAS INSTRUMENTS Circuit Breaker Models 6TC6-7.5 and -10 and 6TC20-7.5 and -10, all with date codes 8150 and earlier |
| appliance | Texas Instruments | Circuit Breakers | Airworthiness Directives; TEXAS INSTRUMENTS Circuit Breaker Models 6TC6-7.5 and -10 and 6TC20-7.5 and -10, all with date codes 8150 and earlier |
Unsafe Condition
Potential overheating of Texas Instruments circuit breaker Models 6TC6-7.5 and -10 and 6TC20-7.5 and -10 with date codes 8150 and earlier.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the circuit breakers with the same model numbers having manufacturing date codes of 8151 and later. Substantiate data may allow alternate compliance methods or adjusted compliance times through an FAA Airworthiness Inspector.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
no later than November 1, 1990, unless already accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Texas Instruments circuit breaker Models 6TC6-7.5 and -10 and 6TC20-7.5 and -10 with date codes 8150 and earlier.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Circuit Breakers
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_90-09-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 90-09-10 Document Type: AD Final Rules Docket Number: 89-ANE-38 Subject Heading: Airworthiness Directives; TEXAS INSTRUMENTS Circuit Breaker Models 6TC6-7.5 and -10 and 6TC20-7.5 a...Show more Subject: Circuit Breakers Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/30/1990 Make: Texas Instruments Model: Circuit Breakers Product Type: Appliance Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 90-09-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 89-ANE-38 AMENDMENT: 39-6565 AD NUMBER: 90-09-10 SUBJECT HEADING: Airworthiness Directives; TEXAS INSTRUMENTS Circuit Breaker Models 6TC6-7.5 and -10 and 6TC20-7.5 and -10, all with date codes 8150 and earlier ACTION: SUMMARY: DATES: Effective May 30, 1990. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 90-09-10 TEXAS INSTRUMENTS: Amendment 39-6565. Docket No. 89-ANE-38. Applicability: To circuit breaker Models 6TC6-7.5 and -10 and 6TC20-7.5 and -10, all with date codes 8150 and earlier. Compliance is required no later than November 1, 1990, unless already accomplished. (a) To prevent potential overheating of the applicable circuit breakers, replace Texas Instruments circuit breaker Models 6TC6-7.5 and -10 and Models 6TC20-7.5 and -10, all with date codes 8150 and earlier. These circuit breakers may be replaced with the same model numbers with the manufacturing date codes of 8151 and later. NOTE: The circuit breakers are installed in, but not limited to, aircraft manufactured by Boeing Commercial Airplanes and Lockheed Corporation. Service bulletins published to date, which may be helpful in identifying replacement circuit breakers, are as follows: (1) The Boeing Commercial Airplanes' service bulletins 757-24-0054, 747-24-2135, and 767-24-0060, all dated August 31, 1989. Their part numbers BACC18AC7 and BACC18AC10 are used to identify Texas Instruments Model 6TC6-7.5 and 6TC6-10, respectively. (2) The Lockheed Corporation service bulletin 093-24-134, dated August 12, 1987. Their part numbers LS10159-7 and LS10159-10 are used to identify Texas Instruments Model 6TC20-7.5 and 6TC20-10, respectively. (b) Upon submission of substantiating data by an owner or operator through an FAA Airworthiness Inspector, an alternate method of compliance with the requirements of this AD or adjustments to the compliance times specified in this AD may be approved by the Manager, Boston Aircraft Certification Office, Engine and Propeller Directorate, Aircraft Certification Service, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803. This amendment (39-6565, AD 90-09-10) becomes effective on May 30, 1990. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_90-09-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 90-09-10 Document Type: AD Final Rules Docket Number: 89-ANE-38 Subject Heading: Airworthiness Directives; TEXAS INSTRUMENTS Circuit Breaker Models 6TC6-7.5 and -10 and 6TC20-7.5 a...Show more Subject: Circuit Breakers Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/30/1990 Make: Texas Instruments Model: Circuit Breakers Product Type: Appliance Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 90-09-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 89-ANE-38 AMENDMENT: 39-6565 AD NUMBER: 90-09-10 SUBJECT HEADING: Airworthiness Directives; TEXAS INSTRUMENTS Circuit Breaker Models 6TC6-7.5 and -10 and 6TC20-7.5 and -10, all with date codes 8150 and earlier ACTION: SUMMARY: DATES: Effective May 30, 1990. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 90-09-10 TEXAS INSTRUMENTS: Amendment 39-6565. Docket No. 89-ANE-38. Applicability: To circuit breaker Models 6TC6-7.5 and -10 and 6TC20-7.5 and -10, all with date codes 8150 and earlier. Compliance is required no later than November 1, 1990, unless already accomplished. (a) To prevent potential overheating of the applicable circuit breakers, replace Texas Instruments circuit breaker Models 6TC6-7.5 and -10 and Models 6TC20-7.5 and -10, all with date codes 8150 and earlier. These circuit breakers may be replaced with the same model numbers with the manufacturing date codes of 8151 and later. NOTE: The circuit breakers are installed in, but not limited to, aircraft manufactured by Boeing Commercial Airplanes and Lockheed Corporation. Service bulletins published to date, which may be helpful in identifying replacement circuit breakers, are as follows: (1) The Boeing Commercial Airplanes' service bulletins 757-24-0054, 747-24-2135, and 767-24-0060, all dated August 31, 1989. Their part numbers BACC18AC7 and BACC18AC10 are used to identify Texas Instruments Model 6TC6-7.5 and 6TC6-10, respectively. (2) The Lockheed Corporation service bulletin 093-24-134, dated August 12, 1987. Their part numbers LS10159-7 and LS10159-10 are used to identify Texas Instruments Model 6TC20-7.5 and 6TC20-10, respectively. (b) Upon submission of substantiating data by an owner or operator through an FAA Airworthiness Inspector, an alternate method of compliance with the requirements of this AD or adjustments to the compliance times specified in this AD may be approved by the Manager, Boston Aircraft Certification Office, Engine and Propeller Directorate, Aircraft Certification Service, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803. This amendment (39-6565, AD 90-09-10) becomes effective on May 30, 1990. 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.