AD 79-11-02
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 |
Unsafe Condition
The auto-speedbrake system may not function properly at outside air temperatures below 25 degrees F, potentially causing the takeoff warning system to malfunction.
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Required Actions
Deactivate the auto-speedbrake system by pulling and collaring circuit breakers and placarding handles inoperative for Group I airplanes. Advise flight crews of potential takeoff warning system malfunction for all affected groups. Perform a one-time check and adjustment of throttle lever auto-speedbrake/takeoff warning switches within 1,000 hours time-in-service or 6 months, whichever comes first.
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Compliance Time
Within 50 hours time-in-service after the effective date, and within 1,000 hours time-in-service or 6 months after the effective date, whichever comes first.
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Affected Aircraft
Boeing Model 727-100 Series, 727-100C Series, 727-200 Series, 727-200F Series, and specific serial numbers listed in Groups I, II, and III as detailed in the source.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Auto-Speedbrake System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_79-11-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 79-11-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 727 Airplanes Subject: Auto-Speedbrake System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/11/1979 Make: The Boeing Company Model: 727-100 Series | 727-100C Series | 727-200 Series | 727-200F Series | 727 Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 79-11-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3482 AD NUMBER: 79-11-02 SUBJECT HEADING: BOEING Model 727 Airplanes ACTION: SUMMARY: DATES: Effective June 11, 1979. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 79-11-02 BOEING: Amendment 39-3482. Applies to the Model 727 airplanes that have the following serial numbers: Group I: These airplanes were delivered with auto-speedbrakes operative: 727-2F2 21603 727-222 21398 through 21425 21557 through 21574 727-225 21449 through 21453 21578 through 21581 727-2R1 21636 727-2A1 21341 through 21344 727-2F9 21426 and 21427 727-287 21688 and 21689 727-290 21510 and 21511 727-243 21661 through 21664 727-256 21609 through 21611 727-2K3 21494 and 21495 727-2L5 21332 and 21333 21539 and 21540 727-2J4 21676 727-281 21455 through 21456 21474 727-251 21503 through 21506 727-2P1 21595 727-2M7 21457 and 21502 21655 727-212 21347 through 21349 21458 through 21460 Group II: These airplanes were delivered without auto-speedbrakes: 727-277 21480 and 21647 727-227 21363 through 21366 21394 and 21395 21461 through 21466 21488 through 21493 21529 through 21531 727-232 21303 through 21315 21430 through 21433 21469 through 21472 21582 and 21583 727-230 21442 21618 through 21623 727-264 21577 and 21617 21637 727-276 21479 and 21646 727-2H3 21318 through 21320 727-247 21329 through 21331 21392 and 21393 21481 through 21485 727-243 21320 Group III: These airplanes were delivered with auto-speedbrakes deactivated: 727-214 21512 and 21513 727-2Q8 21608 Compliance required as indicated: A. Within 50 hours time-in-service after the effective date of this AD, unless Service Bulletin 727-31-A44, revision 1, or later FAA approved revisions, have already been accomplished, accomplish the following: For Group I airplanes delivered with the auto-speedbrake system operative: Prior to conducting operations when the outside air temperature is below 25 degrees F the auto- speedbrake system must be deactivated by pulling and collaring the circuit breakers and placarding handle inoperative and the crew advised that the takeoff warning system may not function. For Group II airplanes delivered without the auto-speedbrake system, and for Group III airplanes that were delivered with the auto-speedbrake system deactivated: Prior to conducting operations when the outside air temperature is below 25 degrees F advise the flight crew that the takeoff warning system may not function. B. Within 1,000 hours time-in-service or 6 months after the effective date of this AD, whichever comes first, and unless already accomplished, perform a one-time check of the throttle lever auto-speedbrake/takeoff warning switch setting and adjust these switches, if necessary, in accordance with Boeing Alert Service Bulletin 727-31-A44, Revision 1, or later FAA-approved revisions. All persons affected by this directive who have not already received these documents from the manufacturer, may obtain copies upon request to Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. This amendment becomes effective June 11, 1979. FOOTER:
Document Text
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AD Final Rules - DRS_79-11-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 79-11-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 727 Airplanes Subject: Auto-Speedbrake System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/11/1979 Make: The Boeing Company Model: 727-100 Series | 727-100C Series | 727-200 Series | 727-200F Series | 727 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: 79-11-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3482 AD NUMBER: 79-11-02 SUBJECT HEADING: BOEING Model 727 Airplanes ACTION: SUMMARY: DATES: Effective June 11, 1979. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 79-11-02 BOEING: Amendment 39-3482. Applies to the Model 727 airplanes that have the following serial numbers: Group I: These airplanes were delivered with auto-speedbrakes operative: 727-2F2 21603 727-222 21398 through 21425 21557 through 21574 727-225 21449 through 21453 21578 through 21581 727-2R1 21636 727-2A1 21341 through 21344 727-2F9 21426 and 21427 727-287 21688 and 21689 727-290 21510 and 21511 727-243 21661 through 21664 727-256 21609 through 21611 727-2K3 21494 and 21495 727-2L5 21332 and 21333 21539 and 21540 727-2J4 21676 727-281 21455 through 21456 21474 727-251 21503 through 21506 727-2P1 21595 727-2M7 21457 and 21502 21655 727-212 21347 through 21349 21458 through 21460 Group II: These airplanes were delivered without auto-speedbrakes: 727-277 21480 and 21647 727-227 21363 through 21366 21394 and 21395 21461 through 21466 21488 through 21493 21529 through 21531 727-232 21303 through 21315 21430 through 21433 21469 through 21472 21582 and 21583 727-230 21442 21618 through 21623 727-264 21577 and 21617 21637 727-276 21479 and 21646 727-2H3 21318 through 21320 727-247 21329 through 21331 21392 and 21393 21481 through 21485 727-243 21320 Group III: These airplanes were delivered with auto-speedbrakes deactivated: 727-214 21512 and 21513 727-2Q8 21608 Compliance required as indicated: A. Within 50 hours time-in-service after the effective date of this AD, unless Service Bulletin 727-31-A44, revision 1, or later FAA approved revisions, have already been accomplished, accomplish the following: For Group I airplanes delivered with the auto-speedbrake system operative: Prior to conducting operations when the outside air temperature is below 25 degrees F the auto- speedbrake system must be deactivated by pulling and collaring the circuit breakers and placarding handle inoperative and the crew advised that the takeoff warning system may not function. For Group II airplanes delivered without the auto-speedbrake system, and for Group III airplanes that were delivered with the auto-speedbrake system deactivated: Prior to conducting operations when the outside air temperature is below 25 degrees F advise the flight crew that the takeoff warning system may not function. B. Within 1,000 hours time-in-service or 6 months after the effective date of this AD, whichever comes first, and unless already accomplished, perform a one-time check of the throttle lever auto-speedbrake/takeoff warning switch setting and adjust these switches, if necessary, in accordance with Boeing Alert Service Bulletin 727-31-A44, Revision 1, or later FAA-approved revisions. All persons affected by this directive who have not already received these documents from the manufacturer, may obtain copies upon request to Boeing Commercial Airplane Company, P.O. Box 3707, Seattle, Washington 98124. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. This amendment becomes effective June 11, 1979. FOOTER:
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