AD 48-34-02
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aircraft Dusting & Spraying | Sulphur Dusting | Airworthiness Directives; Applies to All Aircraft Engaged In Sulphur Dusting |
| appliance | Aircraft Dusting & Spraying | Sulphur Dusting | Airworthiness Directives; Applies to All Aircraft Engaged In Sulphur Dusting |
Unsafe Condition
Exhaust gases discharging under or along the bottom of the airplane, un-bonded fuselage aft of the hopper, inadequate agitator bearings, non-compliant hopper gate materials, and insufficient fire-resistant protection on fuselage surfaces during sulphur dusting operations could lead to fire hazards.
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Required Actions
Install exhaust systems that prevent exhaust gas discharge under or along the fuselage bottom; bond fuselage aft of the hopper and adjacent fittings/struts; provide agitator with sealed bearings or ensure bearings are accessible for lubrication; use nonferrous hopper gate material properly fitted and bonded; cover fuselage surfaces near spreader discharge with fire-resistant material and secure to prevent dust accumulation.
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Compliance Time
By October 1, 1948, if previously certificated and Airworthiness Maintenance Bulletin No. 63 has not been complied with.
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Affected Aircraft
All aircraft engaged in sulphur dusting operations.
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Federal Register Abstract
Sulphur Dusting
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_48-34-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-34-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Applies to All Aircraft Engaged In Sulphur Dusting Subject: Sulphur Dusting Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Aircraft Dusting & Spraying Model: Sulphur Dusting Product Type: Appliance Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 48-34-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-34-02 SUBJECT HEADING: Airworthiness Directives; Applies to All Aircraft Engaged In Sulphur Dusting ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-34-02 Applies to All Aircraft Engaged In Sulphur Dusting. Replaces Airworthiness Maintenance Bulletin No. 63. Compliance at time of original certification or if previously certificated and Airworthiness Maintenance Bulletin No. 63 has not been complied with compliance required by October 1, 1948. To decrease the hazards from fire during dusting operations involving the use of sulphur dust the following fire preventive measures, formerly in Airworthiness Maintenance Bulletin No. 63 must be complied with: (1) The engine exhaust system must be so arranged that it will not discharge exhaust gases under or along the bottom of the airplane. (2) The fuselage aft of and in the vicinity of the hopper must be completely bonded. All fittings and struts adjacent to the hopper should be bonded to each other and the hopper to the fuselage. (3) The agitator should be provided with sealed bearings or the bearings should be readily accessible for lubrication. (4) The hopper gate should be of nonferrous material, well fitted to irs guide channels to prevent friction and accumulation of dust in the channels and should be bonded to the hopper. (5) The lower surface of the fuselage, in the immediate vicinity and 3 feet aft of the spreader discharge opening must be covered with thin-gage metal, plywood or equivalent fire resistant material. Where fabric on the bottom of the fuselage is not eliminated in this installation, the protective covering, to be installed on the outside of the fabric, must be secured in such a manner that will prevent accumulation of dust between the protective covering and the fabric. This may be accomplished by using sealants such as acetate doped fabric tape or other adhesives to bond the protective covering to the fabric. Aircraft which do not comply with these measures shall be restricted, against the use of sulphur for dusting, on the operation limitations. FOOTER:
Document Text
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AD Final Rules - DRS_48-34-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-34-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Applies to All Aircraft Engaged In Sulphur Dusting Subject: Sulphur Dusting Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Aircraft Dusting & Spraying Model: Sulphur Dusting 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: 48-34-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-34-02 SUBJECT HEADING: Airworthiness Directives; Applies to All Aircraft Engaged In Sulphur Dusting ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-34-02 Applies to All Aircraft Engaged In Sulphur Dusting. Replaces Airworthiness Maintenance Bulletin No. 63. Compliance at time of original certification or if previously certificated and Airworthiness Maintenance Bulletin No. 63 has not been complied with compliance required by October 1, 1948. To decrease the hazards from fire during dusting operations involving the use of sulphur dust the following fire preventive measures, formerly in Airworthiness Maintenance Bulletin No. 63 must be complied with: (1) The engine exhaust system must be so arranged that it will not discharge exhaust gases under or along the bottom of the airplane. (2) The fuselage aft of and in the vicinity of the hopper must be completely bonded. All fittings and struts adjacent to the hopper should be bonded to each other and the hopper to the fuselage. (3) The agitator should be provided with sealed bearings or the bearings should be readily accessible for lubrication. (4) The hopper gate should be of nonferrous material, well fitted to irs guide channels to prevent friction and accumulation of dust in the channels and should be bonded to the hopper. (5) The lower surface of the fuselage, in the immediate vicinity and 3 feet aft of the spreader discharge opening must be covered with thin-gage metal, plywood or equivalent fire resistant material. Where fabric on the bottom of the fuselage is not eliminated in this installation, the protective covering, to be installed on the outside of the fabric, must be secured in such a manner that will prevent accumulation of dust between the protective covering and the fabric. This may be accomplished by using sealants such as acetate doped fabric tape or other adhesives to bond the protective covering to the fabric. Aircraft which do not comply with these measures shall be restricted, against the use of sulphur for dusting, on the operation limitations. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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