AD 81-08-04
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Puritan-Bennett Aero Systems | Oxygen Masks | Airworthiness Directives; PURITAN-BENNETT AERO SYSTEMS COMPANY Oxygen Masks P/N 174039, 174010-01, 174010-03, and ZMR100 Series |
| appliance | Puritan-Bennett Aero Systems | Oxygen Masks | Airworthiness Directives; PURITAN-BENNETT AERO SYSTEMS COMPANY Oxygen Masks P/N 174039, 174010-01, 174010-03, and ZMR100 Series |
Unsafe Condition
The regulator inlet valve may cause leakage or positive pressure within the facecone.
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Required Actions
Remove diaphragm assembly P/N F334-1001-1 and install modified diaphragm assembly with diaphragm and plate assembly P/N F334-1003-1, Revision E. Permanently mark 'M' near the mask serial number. Return masks to Puritan-Bennett for modification unless ZMR100 series masks use approved field procedures.
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Compliance Time
Within 120 calendar days from the effective date of this Airworthiness Directive
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Affected Aircraft
Puritan-Bennett Aero Systems Company oxygen masks P/N 174039 (S/N 0001-0012), 174010-01/03 (S/N 00100-00144, 146-147, 149, 00150-00194, 195-259, 261-273, 275-292, 294-390), and ZMR100 series (S/N 6603-7234). Masks without serial numbers are unaffected.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Oxygen Masks
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_81-08-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 81-08-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; PURITAN-BENNETT AERO SYSTEMS COMPANY Oxygen Masks P/N 174039, 174010-01, ...Show more Subject: Oxygen Masks Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/23/1981 Make: Puritan-Bennett Aero Systems Model: Oxygen Masks Product Type: Appliance Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 81-08-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4092 AD NUMBER: 81-08-04 SUBJECT HEADING: Airworthiness Directives; PURITAN-BENNETT AERO SYSTEMS COMPANY Oxygen Masks P/N 174039, 174010-01, 174010-03, and ZMR100 Series ACTION: SUMMARY: DATES: Effective April 23, 1981. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 81-08-04 PURITAN-BENNETT AERO SYSTEMS COMPANY: Amendment 39-4092. Applies to Puritan-Bennett Aero Systems Company oxygen masks P/N 174039, 174010-01, 174010-03, and ZMR100 series as listed below. NOTE: Masks manufactured without serial numbers are not affected by this AD. S/N for P/N 174039 0001 through 0012 S/N for P/N 174010-01 and 174010-03 00100 through 00144 146, 147, 149, 00150 through 00194 195 through 259 261 through 273 275 through 292 294 through 390 S/N for P/N ZMR100 series 6603 through 7234 Compliance required as indicated, unless already accomplished. To prevent the regulator inlet valve from causing either leakage or positive pressure within the facecone, accomplish the following: (a) Within 120 calendar days from the effective date of this Airworthiness Directive, remove diaphragm assembly P/N F334-1001-1 and install diaphragm assembly P/N F334-1001-1 modified to include diaphragm and plate assembly P/N F334-1003-1, Revision E. (b) After modification per paragraph (a) of this AD, permanently mark letter "M" at the end of or beneath the mask serial number. This serial number is located under the face cushion on the left-hand side of the hardshell on the 174039 and ZMR100 series masks, and on the back surface of the head harness on the 174010-01 and 174010-03 masks. (c) The modified diaphragm replacement of paragraph (a) of this AD shall be accomplished by returning the mask to Puritan-Bennett Aero Systems Company, 111 Penn Street, El Segundo, California 90245. However, this replacement in the ZMR100 series masks listed below may be accomplished in the field in accordance with the following Puritan-Bennett Aero System ATA Component Maintenance Manuals: 35-10-25 for the ZMR160 mask 35-10-27 for the ZMR129 mask 35-10-28 for the ZMR129-1 mask 35-10-29 for the ZMR118 mask NOTE: Puritan-Bennett Aero Systems Company Service Bulletin No. 1, dated April 15, 1980, pertains to the subject of this Airworthiness Directive. Alternate inspections, modifications, or other actions which provide an equivalent level of safety may be used when approved by the Chief, Engineering and Manufacturing Branch, FAA Western Region. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 553(a)(1). All persons affected by this directive, who have not already received these documents from the manufacturer, may obtain copies upon request to Puritan-Bennett Aero Systems Company, 111 Penn Street, El Segundo, California 90245. These documents may also be examined at FAA Western Region Office, Room 6W14, 15000 Aviation Boulevard, Hawthorne, California 90261 and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C. 20591. A historical file on this AD, which includes the incorporated material in full, is maintained by the FAA at its headquarters in Washington, D.C. and at FAA Western Region Office. This AD supersedes Amendment 39-4017, (46 FR 3495) AD 81-02-03, as amended by Amendment 39-4066 (46 FR 16888). This amendment becomes effective April 23, 1981. FOOTER:
Document Text
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AD Final Rules - DRS_81-08-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 81-08-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; PURITAN-BENNETT AERO SYSTEMS COMPANY Oxygen Masks P/N 174039, 174010-01, ...Show more Subject: Oxygen Masks Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/23/1981 Make: Puritan-Bennett Aero Systems Model: Oxygen Masks 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: 81-08-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4092 AD NUMBER: 81-08-04 SUBJECT HEADING: Airworthiness Directives; PURITAN-BENNETT AERO SYSTEMS COMPANY Oxygen Masks P/N 174039, 174010-01, 174010-03, and ZMR100 Series ACTION: SUMMARY: DATES: Effective April 23, 1981. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 81-08-04 PURITAN-BENNETT AERO SYSTEMS COMPANY: Amendment 39-4092. Applies to Puritan-Bennett Aero Systems Company oxygen masks P/N 174039, 174010-01, 174010-03, and ZMR100 series as listed below. NOTE: Masks manufactured without serial numbers are not affected by this AD. S/N for P/N 174039 0001 through 0012 S/N for P/N 174010-01 and 174010-03 00100 through 00144 146, 147, 149, 00150 through 00194 195 through 259 261 through 273 275 through 292 294 through 390 S/N for P/N ZMR100 series 6603 through 7234 Compliance required as indicated, unless already accomplished. To prevent the regulator inlet valve from causing either leakage or positive pressure within the facecone, accomplish the following: (a) Within 120 calendar days from the effective date of this Airworthiness Directive, remove diaphragm assembly P/N F334-1001-1 and install diaphragm assembly P/N F334-1001-1 modified to include diaphragm and plate assembly P/N F334-1003-1, Revision E. (b) After modification per paragraph (a) of this AD, permanently mark letter "M" at the end of or beneath the mask serial number. This serial number is located under the face cushion on the left-hand side of the hardshell on the 174039 and ZMR100 series masks, and on the back surface of the head harness on the 174010-01 and 174010-03 masks. (c) The modified diaphragm replacement of paragraph (a) of this AD shall be accomplished by returning the mask to Puritan-Bennett Aero Systems Company, 111 Penn Street, El Segundo, California 90245. However, this replacement in the ZMR100 series masks listed below may be accomplished in the field in accordance with the following Puritan-Bennett Aero System ATA Component Maintenance Manuals: 35-10-25 for the ZMR160 mask 35-10-27 for the ZMR129 mask 35-10-28 for the ZMR129-1 mask 35-10-29 for the ZMR118 mask NOTE: Puritan-Bennett Aero Systems Company Service Bulletin No. 1, dated April 15, 1980, pertains to the subject of this Airworthiness Directive. Alternate inspections, modifications, or other actions which provide an equivalent level of safety may be used when approved by the Chief, Engineering and Manufacturing Branch, FAA Western Region. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 553(a)(1). All persons affected by this directive, who have not already received these documents from the manufacturer, may obtain copies upon request to Puritan-Bennett Aero Systems Company, 111 Penn Street, El Segundo, California 90245. These documents may also be examined at FAA Western Region Office, Room 6W14, 15000 Aviation Boulevard, Hawthorne, California 90261 and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C. 20591. A historical file on this AD, which includes the incorporated material in full, is maintained by the FAA at its headquarters in Washington, D.C. and at FAA Western Region Office. This AD supersedes Amendment 39-4017, (46 FR 3495) AD 81-02-03, as amended by Amendment 39-4066 (46 FR 16888). This amendment becomes effective April 23, 1981. FOOTER:
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