AD 82-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B | Airworthiness Directives; Mitsubishi Model MU-2B/-10/-15/-20/-25, MU-2B-30 and MU-2B-36 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-10 | Airworthiness Directives; Mitsubishi Model MU-2B/-10/-15/-20/-25, MU-2B-30 and MU-2B-36 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-15 | Airworthiness Directives; Mitsubishi Model MU-2B/-10/-15/-20/-25, MU-2B-30 and MU-2B-36 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-20 | Airworthiness Directives; Mitsubishi Model MU-2B/-10/-15/-20/-25, MU-2B-30 and MU-2B-36 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-25 | Airworthiness Directives; Mitsubishi Model MU-2B/-10/-15/-20/-25, MU-2B-30 and MU-2B-36 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-30 | Airworthiness Directives; Mitsubishi Model MU-2B/-10/-15/-20/-25, MU-2B-30 and MU-2B-36 Series Airplanes |
| aircraft | Mitsubishi Heavy Industries, Ltd. | MU-2B-36 | Airworthiness Directives; Mitsubishi Model MU-2B/-10/-15/-20/-25, MU-2B-30 and MU-2B-36 Series Airplanes |
Unsafe Condition
Failure of the engine fire detecting and DC power emergency relay circuits could result in incorrect fire detection and loss of DC power emergency relay function.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect and repair the engine fire detecting and DC power emergency relay circuits as prescribed in Sections I and II of MHI Service Bulletin 187. Aircraft may be flown under FAR 21.197 to a maintenance facility for this inspection. An alternate means of compliance may be used if approved by the Manager, Honolulu Aircraft Certification Field Office.
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
Mitsubishi Heavy Industries, Ltd. Model MU-2B/-10/-15/-20/-25 (Serial Numbers 005 thru 238), MU-2B-30 (Serial Numbers 502 thru 547), and MU-2B-36 (Serial Number 501). Excludes MU-2B with serial numbers having the suffix 'SA'.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Fire Detection
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_82-21-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 82-21-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Mitsubishi Model MU-2B/-10/-15/-20/-25, MU-2B-30 and MU-2B-36 Series Airplanes Subject: Fire Detection Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/14/1982 Make: Mitsubishi Heavy Industries, Ltd. Model: MU-2B | MU-2B-10 | MU-2B-15 | MU-2B-20 | MU-2B-25 | MU-2B-30 | MU-2B-36 Product Type: Aircraft Product Subtype: Small 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: 82-21-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4472 AD NUMBER: 82-21-03 SUBJECT HEADING: Airworthiness Directives; Mitsubishi Model MU-2B/-10/-15/-20/-25, MU-2B-30 and MU-2B-36 Series Airplanes ACTION: SUMMARY: DATES: Effective October 14, 1982. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 82-21-03 MITSUBISHI HEAVY INDUSTRIES, LTD., (MHI): Amendment 39-4472. Applies to MU-2B/-10/-15/-20/-25 (Serial Numbers 005 thru 238), MU-2B-30 (Serial Numbers 502 thru 547), and MU-2B-36 (Serial Number 501) airplanes certificated in any category. (This AD does not apply to MU-2B airplanes having serial numbers with the suffix "SA.") COMPLIANCE: Required as indicated unless already accomplished. To ensure correct engine fire detection and DC power emergency relay wiring, within the next 25 hours time-in-service after the effective date of this AD, accomplish the following: a) Inspect and, if necessary, repair the engine fire detecting and DC power emergency relay circuits as prescribed in Sections I and II of MHI Service Bulletin 187, dated May 27, 1982. b) Aircraft may be flown in accordance with FAR 21.197 to a maintenance facility where this inspection can be accomplished. c) An alternate means of compliance with this AD may be used when approved by the Manager, Honolulu Aircraft Certification Field Office, Northwest Mountain Region, Federal Aviation Administration, 300 Ala Moana Boulevard, Honolulu, Hawaii 96850. This amendment becomes effective on October 14, 1982. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_82-21-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 82-21-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Mitsubishi Model MU-2B/-10/-15/-20/-25, MU-2B-30 and MU-2B-36 Series Airplanes Subject: Fire Detection Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/14/1982 Make: Mitsubishi Heavy Industries, Ltd. Model: MU-2B | MU-2B-10 | MU-2B-15 | MU-2B-20 | MU-2B-25 | MU-2B-30 | MU-2B-36 Product Type: Aircraft Product Subtype: Small 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: 82-21-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4472 AD NUMBER: 82-21-03 SUBJECT HEADING: Airworthiness Directives; Mitsubishi Model MU-2B/-10/-15/-20/-25, MU-2B-30 and MU-2B-36 Series Airplanes ACTION: SUMMARY: DATES: Effective October 14, 1982. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 82-21-03 MITSUBISHI HEAVY INDUSTRIES, LTD., (MHI): Amendment 39-4472. Applies to MU-2B/-10/-15/-20/-25 (Serial Numbers 005 thru 238), MU-2B-30 (Serial Numbers 502 thru 547), and MU-2B-36 (Serial Number 501) airplanes certificated in any category. (This AD does not apply to MU-2B airplanes having serial numbers with the suffix "SA.") COMPLIANCE: Required as indicated unless already accomplished. To ensure correct engine fire detection and DC power emergency relay wiring, within the next 25 hours time-in-service after the effective date of this AD, accomplish the following: a) Inspect and, if necessary, repair the engine fire detecting and DC power emergency relay circuits as prescribed in Sections I and II of MHI Service Bulletin 187, dated May 27, 1982. b) Aircraft may be flown in accordance with FAR 21.197 to a maintenance facility where this inspection can be accomplished. c) An alternate means of compliance with this AD may be used when approved by the Manager, Honolulu Aircraft Certification Field Office, Northwest Mountain Region, Federal Aviation Administration, 300 Ala Moana Boulevard, Honolulu, Hawaii 96850. This amendment becomes effective on October 14, 1982. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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