AD 84-06-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hamburger Flugzeugbau G.m.b.H. | HFB 320 Hansa | Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM GmbH Model HFB-320 Airplanes |
Unsafe Condition
Failure of the stabilizer/elevator outboard bearing housing fittings due to cracks greater than 0.79 inches.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a one-time inspection of the stabilizer/elevator outboard bearing housing fittings within 25 hours time in service or 45 days after the effective date, whichever occurs first. Replace fittings with cracks greater than 0.79 inches prior to further flight. Stop drill fittings with cracks 0.79 inches or less and replace them within six months.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 25 hours time in service or 45 days after the effective date of this AD, whichever occurs first
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
MESSERSCHMITT-BOLKOW-BLOHM GmbH Model HFB-320 airplanes listed in HFB-320 Service Bulletin 55-8 dated September 14, 1983
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Stabilizer/Elevator Fittings
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_84-06-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 84-06-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM GmbH Model HFB-320 Airplanes Subject: Stabilizer/Elevator Fittings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/09/1984 Make: Hamburger Flugzeugbau G.m.b.H. Model: HFB 320 Hansa Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 84-06-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4834 AD NUMBER: 84-06-04 SUBJECT HEADING: Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM GmbH Model HFB-320 Airplanes ACTION: SUMMARY: DATES: Effective April 9, 1984. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 84-06-04 MESSERSCHMITT-BOLKOW-BLOHM GmbH: Amendment 39-4834. Applies to HFB-320 airplanes as listed in HFB-320 Service Bulletin 55-8 dated September 14, 1983, certificated in all categories. Compliance is required as indicated unless previously accomplished. To prevent failure of the stabilizer/elevator outboard bearing housing fittings accomplish the following: A. Within the next 25 hours time in service or 45 days after the effective date of this AD, whichever occurs first, perform a one-time inspection of the stabilizer/elevator outboard bearing housing fittings in accordance with HFB-320 Service Bulletin 55-8 dated September 14, 1983. Fittings with cracks greater than 0.79 inches must be replaced prior to further flight. Fittings cracked 0.79 inches or less must be stop drilled per the service bulletin, but also must be replaced within six months. B. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle 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 airplanes to a base for the accomplishment of inspections and/or modifications required by this AD. This amendment becomes effective April 9, 1984. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_84-06-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 84-06-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM GmbH Model HFB-320 Airplanes Subject: Stabilizer/Elevator Fittings Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/09/1984 Make: Hamburger Flugzeugbau G.m.b.H. Model: HFB 320 Hansa 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: 84-06-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4834 AD NUMBER: 84-06-04 SUBJECT HEADING: Airworthiness Directives; MESSERSCHMITT-BOLKOW-BLOHM GmbH Model HFB-320 Airplanes ACTION: SUMMARY: DATES: Effective April 9, 1984. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 84-06-04 MESSERSCHMITT-BOLKOW-BLOHM GmbH: Amendment 39-4834. Applies to HFB-320 airplanes as listed in HFB-320 Service Bulletin 55-8 dated September 14, 1983, certificated in all categories. Compliance is required as indicated unless previously accomplished. To prevent failure of the stabilizer/elevator outboard bearing housing fittings accomplish the following: A. Within the next 25 hours time in service or 45 days after the effective date of this AD, whichever occurs first, perform a one-time inspection of the stabilizer/elevator outboard bearing housing fittings in accordance with HFB-320 Service Bulletin 55-8 dated September 14, 1983. Fittings with cracks greater than 0.79 inches must be replaced prior to further flight. Fittings cracked 0.79 inches or less must be stop drilled per the service bulletin, but also must be replaced within six months. B. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle 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 airplanes to a base for the accomplishment of inspections and/or modifications required by this AD. This amendment becomes effective April 9, 1984. FOOTER:
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Retrieved: Apr 8, 2026
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