AD 76-01-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes |
| aircraft | The Boeing Company | DC-9-32F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes |
| aircraft | The Boeing Company | DC-9-32F (C-9A) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes |
| aircraft | The Boeing Company | DC-9-32F (C-9B) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes |
| aircraft | The Boeing Company | DC-9-33F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes |
| aircraft | The Boeing Company | DC-9-34 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes |
| aircraft | The Boeing Company | DC-9-34F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes |
| aircraft | The Boeing Company | DC-9-51 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes |
Unsafe Condition
Manually induced longitudinal porpoising aggravated by the elevator boost system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the hydraulic bleed stop assembly, P/N 4934616-1, per Douglas Alert Service Bulletin A27-176 or later FAA-approved revisions, or an equivalent procedure approved by the Chief, Aircraft Engineering Division, FAA Western Region.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 50 hours' time in service or 5 days whichever comes first 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-9-30 and -50 Series Airplanes Fuselage Numbers 757, 763, 780 through 795, 797 and 798
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Longitudinal Porpoising
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_76-01-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-01-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes Subject: Longitudinal Porpoising Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 01/15/1976 Make: The Boeing Company Model: DC-9-31 | DC-9-32 | DC-9-32 (VC-9C) | DC-9-32F | DC-9-32F (C-9A) | DC-9-32F (C-9B) | DC-9-33F | DC-9...Show more 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: 76-01-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2489 AD NUMBER: 76-01-04 SUBJECT HEADING: Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes ACTION: SUMMARY: DATES: Effective January 15, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-01-04 MCDONNELL DOUGLAS: Amendment 39-2489. Applies to Model DC-9-30 and -50 Series Airplanes Fuselage Numbers 757, 763, 780 through 795, 797 and 798, certificated in all categories. Compliance required within the next 50 hours' time in service or 5 days whichever comes first after the effective date of this AD, unless already accomplished. To prevent manually induced longitudinal proposing aggravated by the elevator boost system accomplish the following: Remove the hydraulic bleed stop assembly, P/N 4934616-1, per Douglas Alert Service Bulletin A27-176, dated December 13, 1975, or later FAA-approved revisions, or an equivalent procedure approved by the Chief, Aircraft Engineering Division, FAA Western Region. This amendment becomes effective on January 15, 1976. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_76-01-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-01-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes Subject: Longitudinal Porpoising Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 01/15/1976 Make: The Boeing Company Model: DC-9-31 | DC-9-32 | DC-9-32 (VC-9C) | DC-9-32F | DC-9-32F (C-9A) | DC-9-32F (C-9B) | DC-9-33F | DC-9...Show more 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: 76-01-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2489 AD NUMBER: 76-01-04 SUBJECT HEADING: Airworthiness Directives; MCDONNELL DOUGLAS DC-9-30 and -50 Series Airplanes ACTION: SUMMARY: DATES: Effective January 15, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-01-04 MCDONNELL DOUGLAS: Amendment 39-2489. Applies to Model DC-9-30 and -50 Series Airplanes Fuselage Numbers 757, 763, 780 through 795, 797 and 798, certificated in all categories. Compliance required within the next 50 hours' time in service or 5 days whichever comes first after the effective date of this AD, unless already accomplished. To prevent manually induced longitudinal proposing aggravated by the elevator boost system accomplish the following: Remove the hydraulic bleed stop assembly, P/N 4934616-1, per Douglas Alert Service Bulletin A27-176, dated December 13, 1975, or later FAA-approved revisions, or an equivalent procedure approved by the Chief, Aircraft Engineering Division, FAA Western Region. This amendment becomes effective on January 15, 1976. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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