AD 81-19-07
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 727-100 Series | BOEING Model 727 Airplanes |
| aircraft | The Boeing Company | 727-100C Series | BOEING Model 727 Airplanes |
| aircraft | The Boeing Company | 727-200 Series | BOEING Model 727 Airplanes |
| aircraft | The Boeing Company | 727-200F Series | BOEING Model 727 Airplanes |
| aircraft | The Boeing Company | 727 Series | BOEING Model 727 Airplanes |
| aircraft | The Boeing Company | 727C Series | BOEING Model 727 Airplanes |
Unsafe Condition
Failure of the Air Flow Multiplier could result in loss of pressurization or structural damage to the airplane.
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Required Actions
Within 300 hours time-in-service after the effective date, begin performing repetitive inspections of the Air Flow Multiplier per Boeing Alert Service Bulletin 727-21A95, repeated every 1000 hours time-in-service. Alternatively, accomplish AiResearch Service Bulletin 21-2291 modification or approved equivalent actions.
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Compliance Time
Within 300 hours time-in-service after the effective date of this AD
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Affected Aircraft
Boeing Model 727 airplanes with Air Flow Multiplier installed through line number 1264 where AiResearch Service Bulletin 21-2291 has not been incorporated
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Federal Register Abstract
Air Flow Multiplier
Applicability Source Text
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AD Final Rules - DRS_81-19-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 81-19-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 727 Airplanes Subject: Air Flow Multiplier Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/20/1981 Make: The Boeing Company Model: 727-100 Series | 727-100C Series | 727-200 Series | 727-200F Series | 727 Series | 727C Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 81-19-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4212 AD NUMBER: 81-19-07 SUBJECT HEADING: BOEING Model 727 Airplanes ACTION: SUMMARY: DATES: Effective September 20, 1981. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 81-19-07 BOEING: Amendment 39-4212. Applies to Boeing Model 727 airplanes certificated in all categories with the Air Flow Multiplier installed, through line number 1264, on which AiResearch Service Bulletin 21-2291 has not been incorporated. Within 300 hours time-in-service after the effective date of this AD, accomplish one of the following, unless already accomplished: A. Begin performing the repetitive inspections of the Air Flow Multiplier in accordance with Boeing Alert Service Bulletin 727-21A95, dated May 29, 1981. This inspection must be repeated at intervals not to exceed 1000 hours time-in-service. Step B or C below may be used for terminating action for these repetitive inspections. B. Accomplish the modification to the air flow multiplier in accordance with AiResearch Service Bulletin 21-2291. C. Alternative inspections, repairs, or other action which provide an equivalent level of safety may be used when approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest 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. 552(a)(1). All persons affected by this directive who have not already received the above specified alert service bulletin from the manufacturer may obtain copies upon request to Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124, or it may be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. This amendment becomes effective September 20, 1981. FOOTER:
Document Text
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AD Final Rules - DRS_81-19-07.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 81-19-07 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 727 Airplanes Subject: Air Flow Multiplier Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/20/1981 Make: The Boeing Company Model: 727-100 Series | 727-100C Series | 727-200 Series | 727-200F Series | 727 Series | 727C Series 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: 81-19-07 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4212 AD NUMBER: 81-19-07 SUBJECT HEADING: BOEING Model 727 Airplanes ACTION: SUMMARY: DATES: Effective September 20, 1981. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 81-19-07 BOEING: Amendment 39-4212. Applies to Boeing Model 727 airplanes certificated in all categories with the Air Flow Multiplier installed, through line number 1264, on which AiResearch Service Bulletin 21-2291 has not been incorporated. Within 300 hours time-in-service after the effective date of this AD, accomplish one of the following, unless already accomplished: A. Begin performing the repetitive inspections of the Air Flow Multiplier in accordance with Boeing Alert Service Bulletin 727-21A95, dated May 29, 1981. This inspection must be repeated at intervals not to exceed 1000 hours time-in-service. Step B or C below may be used for terminating action for these repetitive inspections. B. Accomplish the modification to the air flow multiplier in accordance with AiResearch Service Bulletin 21-2291. C. Alternative inspections, repairs, or other action which provide an equivalent level of safety may be used when approved by the Chief, Seattle Area Aircraft Certification Office, FAA Northwest 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. 552(a)(1). All persons affected by this directive who have not already received the above specified alert service bulletin from the manufacturer may obtain copies upon request to Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124, or it may be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. This amendment becomes effective September 20, 1981. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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