AD 70-15-18
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Mitchell Industries, Inc. | Auto Pilot Systems Instruments | Airworthiness Directives; MITCHELL INDUSTRIES, INC., doing business as EDO-AIRE MITCHELL: Applies to the Mitchell Century II, Century III (Serial Numbers 624 and below) and Stabilizer, Automatic Pilot and Automatic Aileron Stabilizer Instruments, and to Piper AutoControl III, Altimatic III and AutoFlite Automatic Pilot and Automatic Aileron Stabilizer Instruments |
| appliance | Mitchell Industries, Inc. | Auto Pilot Systems Instruments | Airworthiness Directives; MITCHELL INDUSTRIES, INC., doing business as EDO-AIRE MITCHELL: Applies to the Mitchell Century II, Century III (Serial Numbers 624 and below) and Stabilizer, Automatic Pilot and Automatic Aileron Stabilizer Instruments, and to Piper AutoControl III, Altimatic III and AutoFlite Automatic Pilot and Automatic Aileron Stabilizer Instruments |
Unsafe Condition
Slippage of servo bridle cable clamps and resultant binding of the control system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove Servo Bridle Cable Clamps (Mitchell P/N 42A173 or 42A184) and replace with new clamps (Mitchell P/N 42A173-1 or 42A184-1) per Mitchell Service Bulletin MB-1 (dated 2-11-68 or later revisions) or approved instructions.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 25 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
Mitchell Century II, Century III (Serial Numbers 624 and below), and Stabilizer, Automatic Pilot and Automatic Aileron Stabilizer Instruments; Piper AutoControl III, Altimatic III, and AutoFlite Automatic Pilot and Automatic Aileron Stabilizer Instruments installed per listed Supplemental Type Certificates (STCs) for Aero Commander, Beech, Cessna, Helio, Maule, Piper, Riley 400, and Wren aircraft models.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Automatic Pilot and Automatic Aileron Stabilizer Instruments
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_70-15-18.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-15-18 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; MITCHELL INDUSTRIES, INC., doing business as EDO-AIRE MITCHELL: Applies...Show more Subject: Automatic Pilot and Automatic Aileron Stabilizer Instruments Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/31/1970 Make: Mitchell Industries, Inc. Model: Auto Pilot Systems Instruments 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: 70-15-18 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1046 AD NUMBER: 70-15-18 SUBJECT HEADING: Airworthiness Directives; MITCHELL INDUSTRIES, INC., doing business as EDO-AIRE MITCHELL: Applies to the Mitchell Century II, Century III (Serial Numbers 624 and below) and Stabilizer, Automatic Pilot and Automatic Aileron Stabilizer Instruments, and to Piper AutoControl III, Altimatic III and AutoFlite Automatic Pilot and Automatic Aileron Stabilizer Instruments ACTION: SUMMARY: DATES: Effective August 31, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-15-18 MITCHELL INDUSTRIES, INC., doing business as EDO-AIRE MITCHELL: Amendment 39-1046. Applies to the Mitchell Century II, Century III (Serial Numbers 624 and below) and Stabilizer, automatic pilot and automatic aileron stabilizer instruments, and to Piper AutoControl III, Altimatic III and AutoFlite automatic pilot and automatic aileron stabilizer instruments installed in various light aircraft in accordance with the following Supplemental Type Certificates: AIRCRAFT MAKE SUPPLEMENTAL TYPE CERTIFICATE NUMBERS Aero Commander SA680SW Beech SA617SW SA742SW SA755SW SA800SW SA638SW SA745SW SA761SW SA824SW SA651SW SA754SW SA767SW SA837SW Cessna SA603SW SA624SW SA668SW SA784SW (See also Wren) SA606SW SA637SW SA669SW SA789SW SA607SW SA658SW SA709SW SA795SW SA621SW SA667SW SA737SW SA829SW deHavilland (See Riley 400) Helio SA615SW Maule SA693SW Piper SA511SW SA540SW SA596SW SA757SW SA525SW SA566SW SA662SW SA822SW SA532SW SA576SW SA707SW SA862SW SA533SW SA581SW SA756SW SA921SW Riley 400 (deHavilland modified per STC's SA120SO, SE163SO and SA164SO) SA676SW Wren (Cessna modified per SA791SW STC No. SA485SW) Compliance required within the next 25 hours' time in service after the effective date of this AD, unless already accomplished. To prevent slippage of servo bridle cable clamps and resultant binding of the control system, accomplish the following: Remove Servo Bridle Cable Clamps, Mitchell P/N 42A173 or 42A184, as applicable, and replace with new Servo Bridle Cable Clamps, Mitchell P/N 42A173-1 or 42A184-1, as applicable, in accordance with the installation instructions in Mitchell Industries, Inc. Service Bulletin No. MB-1 dated 2-11-68, revised as Edo-Aire Mitchell Service Bulletin No. MB-1 dated 6-1-70, or later FAA approved revision, or in accordance with instructions approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration. The revised bulletin may be obtained from Edo-Aire Mitchell, P.O. Box 610, Mineral Wells, Texas 76067. This Amendment becomes effective August 31, 1970. FOOTER:
Document Text
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AD Final Rules - DRS_70-15-18.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-15-18 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; MITCHELL INDUSTRIES, INC., doing business as EDO-AIRE MITCHELL: Applies...Show more Subject: Automatic Pilot and Automatic Aileron Stabilizer Instruments Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/31/1970 Make: Mitchell Industries, Inc. Model: Auto Pilot Systems Instruments 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: 70-15-18 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1046 AD NUMBER: 70-15-18 SUBJECT HEADING: Airworthiness Directives; MITCHELL INDUSTRIES, INC., doing business as EDO-AIRE MITCHELL: Applies to the Mitchell Century II, Century III (Serial Numbers 624 and below) and Stabilizer, Automatic Pilot and Automatic Aileron Stabilizer Instruments, and to Piper AutoControl III, Altimatic III and AutoFlite Automatic Pilot and Automatic Aileron Stabilizer Instruments ACTION: SUMMARY: DATES: Effective August 31, 1970. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-15-18 MITCHELL INDUSTRIES, INC., doing business as EDO-AIRE MITCHELL: Amendment 39-1046. Applies to the Mitchell Century II, Century III (Serial Numbers 624 and below) and Stabilizer, automatic pilot and automatic aileron stabilizer instruments, and to Piper AutoControl III, Altimatic III and AutoFlite automatic pilot and automatic aileron stabilizer instruments installed in various light aircraft in accordance with the following Supplemental Type Certificates: AIRCRAFT MAKE SUPPLEMENTAL TYPE CERTIFICATE NUMBERS Aero Commander SA680SW Beech SA617SW SA742SW SA755SW SA800SW SA638SW SA745SW SA761SW SA824SW SA651SW SA754SW SA767SW SA837SW Cessna SA603SW SA624SW SA668SW SA784SW (See also Wren) SA606SW SA637SW SA669SW SA789SW SA607SW SA658SW SA709SW SA795SW SA621SW SA667SW SA737SW SA829SW deHavilland (See Riley 400) Helio SA615SW Maule SA693SW Piper SA511SW SA540SW SA596SW SA757SW SA525SW SA566SW SA662SW SA822SW SA532SW SA576SW SA707SW SA862SW SA533SW SA581SW SA756SW SA921SW Riley 400 (deHavilland modified per STC's SA120SO, SE163SO and SA164SO) SA676SW Wren (Cessna modified per SA791SW STC No. SA485SW) Compliance required within the next 25 hours' time in service after the effective date of this AD, unless already accomplished. To prevent slippage of servo bridle cable clamps and resultant binding of the control system, accomplish the following: Remove Servo Bridle Cable Clamps, Mitchell P/N 42A173 or 42A184, as applicable, and replace with new Servo Bridle Cable Clamps, Mitchell P/N 42A173-1 or 42A184-1, as applicable, in accordance with the installation instructions in Mitchell Industries, Inc. Service Bulletin No. MB-1 dated 2-11-68, revised as Edo-Aire Mitchell Service Bulletin No. MB-1 dated 6-1-70, or later FAA approved revision, or in accordance with instructions approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration. The revised bulletin may be obtained from Edo-Aire Mitchell, P.O. Box 610, Mineral Wells, Texas 76067. This Amendment becomes effective August 31, 1970. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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