AD 84-09-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-8-71 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8-70 Series Airplanes |
| aircraft | The Boeing Company | DC-8-72 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8-70 Series Airplanes |
| aircraft | The Boeing Company | DC-8-73 | Airworthiness Directives; MCDONNELL DOUGLAS DC-8-70 Series Airplanes |
Unsafe Condition
Failure of the P/N C24466000 Thrust Reverser Hydraulic Control Units (HCU's) on the inboard thrust reversers could result in uncommanded thrust reverser deployment or failure to stow, leading to loss of control or damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace P/N C24466000 HCU's on both inboard engine thrust reversers with approved units (P/N C24466000-/-2, P/N C24466001-2, or FAA-approved equivalents) within 30 days after the AD's effective date. AFM limitations from AD 82-19-51 R1 may be removed after replacement on all fleet aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 30 days after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
McDonnell Douglas Model DC-8-70 series airplanes equipped with P/N C24466000 Thrust Reverser Hydraulic Control Units (HCU's) on the inboard thrust reversers
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Engine Thrust Reversers
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_84-09-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 84-09-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; MCDONNELL DOUGLAS DC-8-70 Series Airplanes Subject: Engine Thrust Reversers Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/01/1984 Make: The Boeing Company Model: DC-8-71 | DC-8-72 | DC-8-73 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 84-09-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4855 AD NUMBER: 84-09-04 SUBJECT HEADING: Airworthiness Directives; MCDONNELL DOUGLAS DC-8-70 Series Airplanes ACTION: SUMMARY: DATES: Effective June 1, 1984. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 84-09-04 MCDONNELL DOUGLAS: Amendment 39-4855. Applies to McDonnell Douglas Model DC-8-70 series airplanes equipped with P/N C24466000 Thrust Reverser Hydraulic Control Units (HCU's) on the inboard thrust reversers, certificated in all categories. Compliance required as indicated in the body of this AD, unless previously accomplished: A. Replace P/N C24466000 HCU's on both inboard (#2 & #3) engine thrust reversers with P/N C24466000-/-2, P/N C24466001-2, or other FAA approved units, within 30 days after the effective date of this AD. The AFM limitations required by AD 82-19-51 R1, Amendment 39-4714 may be removed after HCU's are replaced on all aircraft in each operator's fleet. Note: P/N C24466000 HCU's can be modified to P/N C24466000-/-2 in accordance with CFMI Service Bulletin (CFM-56-2) 78-057, dated March 30, 1982, or later FAA approved revisions. B. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region. C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplanes to a base to comply with the requirements of this AD. All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Director, Publications and Training, C1-750 (54-60). These documents also may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or at the Los Angeles Aircraft Certification Office, 4344 Donald Douglas Drive, Long Beach, California. This supersedes Amendment 39-4714 (48 FR 40212), AD 82-19-51. This amendment becomes effective June 1, 1984. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_84-09-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 84-09-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; MCDONNELL DOUGLAS DC-8-70 Series Airplanes Subject: Engine Thrust Reversers Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/01/1984 Make: The Boeing Company Model: DC-8-71 | DC-8-72 | DC-8-73 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: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 84-09-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4855 AD NUMBER: 84-09-04 SUBJECT HEADING: Airworthiness Directives; MCDONNELL DOUGLAS DC-8-70 Series Airplanes ACTION: SUMMARY: DATES: Effective June 1, 1984. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 84-09-04 MCDONNELL DOUGLAS: Amendment 39-4855. Applies to McDonnell Douglas Model DC-8-70 series airplanes equipped with P/N C24466000 Thrust Reverser Hydraulic Control Units (HCU's) on the inboard thrust reversers, certificated in all categories. Compliance required as indicated in the body of this AD, unless previously accomplished: A. Replace P/N C24466000 HCU's on both inboard (#2 & #3) engine thrust reversers with P/N C24466000-/-2, P/N C24466001-2, or other FAA approved units, within 30 days after the effective date of this AD. The AFM limitations required by AD 82-19-51 R1, Amendment 39-4714 may be removed after HCU's are replaced on all aircraft in each operator's fleet. Note: P/N C24466000 HCU's can be modified to P/N C24466000-/-2 in accordance with CFMI Service Bulletin (CFM-56-2) 78-057, dated March 30, 1982, or later FAA approved revisions. B. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region. C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplanes to a base to comply with the requirements of this AD. All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Director, Publications and Training, C1-750 (54-60). These documents also may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or at the Los Angeles Aircraft Certification Office, 4344 Donald Douglas Drive, Long Beach, California. This supersedes Amendment 39-4714 (48 FR 40212), AD 82-19-51. This amendment becomes effective June 1, 1984. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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