AD 81-16-06 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-10-10 | Airworthiness Directives; McDONNELL DOUGLAS DC-10 Series Airplanes |
| aircraft | The Boeing Company | DC-10-10F | Airworthiness Directives; McDONNELL DOUGLAS DC-10 Series Airplanes |
| aircraft | The Boeing Company | DC-10-15 | Airworthiness Directives; McDONNELL DOUGLAS DC-10 Series Airplanes |
| aircraft | The Boeing Company | DC-10-30 | Airworthiness Directives; McDONNELL DOUGLAS DC-10 Series Airplanes |
| aircraft | The Boeing Company | DC-10-30F (KC-10A, KDC-10) | Airworthiness Directives; McDONNELL DOUGLAS DC-10 Series Airplanes |
| aircraft | The Boeing Company | DC-10-40 | Airworthiness Directives; McDONNELL DOUGLAS DC-10 Series Airplanes |
| aircraft | The Boeing Company | DC-10-40F | Airworthiness Directives; McDONNELL DOUGLAS DC-10 Series Airplanes |
Unsafe Condition
Temporary loss of all electrical flight instruments and lighting due to generator frequency exceeding 420 Hz when generators are operated in parallel or nonparalleled configurations.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Incorporate a revision in the Airplane Flight Manual's Limitations Section specifying pre-takeoff engine RPM stabilization above 60% N2 and generator frequency checks below 420 Hz. For night or IMC operations, perform procedures to operate generators nonparalleled before descending below 10,000 feet MSL. Alternatively, install new voltage sensing relay components per McDonnell Douglas Service Bulletin 24-116.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 10 days after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
McDonnell Douglas Model DC-10 series airplanes certificated in all categories
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Generator Operation
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_81-16-06_R.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 81-16-06 R1 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; McDONNELL DOUGLAS DC-10 Series Airplanes Subject: Generator Operation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/26/1981 Make: The Boeing Company Model: DC-10-10 | DC-10-10F | DC-10-15 | DC-10-30 | DC-10-30F (KC-10A, KDC-10) | DC-10-40 | DC-10-40F 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: 81-16-06 R1 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4234 AD NUMBER: 81-16-06 R1 SUBJECT HEADING: Airworthiness Directives; McDONNELL DOUGLAS DC-10 Series Airplanes ACTION: SUMMARY: DATES: Effective October 26, 1981. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 81-16-06 R1 McDONNELL DOUGLAS: Amendment 39-4177 as amended by Amendment 39-4234. Applies to McDonnell Douglas Model DC-10 series airplanes certificated in all categories. Compliance required within 10 days after the effective date of this AD. A. To prevent temporary loss of all electrical flight instruments and lighting, incorporate in the Limitations Section of the FAA Approved Airplane Flight Manual a revision which specifies the following: 1. Prior to each takeoff, stabilize engine RPM above 60% N2. With generators paralleled, check to ensure that generator frequency is below 420 Hz; or, if generators are nonparalleled, check to ensure that each operating generator is below 420 Hz. 2. When operating at night or in instrument meteorological conditions, and before reaching 10,000 feet MSL during descent for landing, complete procedure to operate generators nonparalleled until landing. B. A copy of this AD inserted in the Airplane Flight Manual may be considered as an acceptable means of compliance with the required Airplane Flight Manual revision. C. Alternative means of compliance providing an equivalent level of safety may be used when approved by the Chief, Los Angeles Area Aircraft Certification Office, FAA Northwest Region. D. The installation of new voltage sensing relay components in accordance with Group I, Phase I of Part 2, in the Accomplishment Instructions of McDonnell Douglas DC-10 Service Bulletin 24-116, dated August 21, 1981, or later revisions approved by the Chief, Los Angeles Area Aircraft Certification Office, FAA Northwest Region may be accomplished in lieu of the Flight Manual Revision and test procedure specified in paragraphs (A) and (B) above; and constitutes terminating action for this AD. 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 these documents from the manufacturer may obtain copies upon request to the McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Director, Publications and Training, C1-750 (54-60). These documents also may be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108 or 4344 Donald Douglas Drive, Long Beach, California 90808. Amendment 39-4117 became effective August 10, 1981. This amendment becomes effective October 26, 1981. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_81-16-06_R.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 81-16-06 R1 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; McDONNELL DOUGLAS DC-10 Series Airplanes Subject: Generator Operation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/26/1981 Make: The Boeing Company Model: DC-10-10 | DC-10-10F | DC-10-15 | DC-10-30 | DC-10-30F (KC-10A, KDC-10) | DC-10-40 | DC-10-40F 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: 81-16-06 R1 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4234 AD NUMBER: 81-16-06 R1 SUBJECT HEADING: Airworthiness Directives; McDONNELL DOUGLAS DC-10 Series Airplanes ACTION: SUMMARY: DATES: Effective October 26, 1981. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 81-16-06 R1 McDONNELL DOUGLAS: Amendment 39-4177 as amended by Amendment 39-4234. Applies to McDonnell Douglas Model DC-10 series airplanes certificated in all categories. Compliance required within 10 days after the effective date of this AD. A. To prevent temporary loss of all electrical flight instruments and lighting, incorporate in the Limitations Section of the FAA Approved Airplane Flight Manual a revision which specifies the following: 1. Prior to each takeoff, stabilize engine RPM above 60% N2. With generators paralleled, check to ensure that generator frequency is below 420 Hz; or, if generators are nonparalleled, check to ensure that each operating generator is below 420 Hz. 2. When operating at night or in instrument meteorological conditions, and before reaching 10,000 feet MSL during descent for landing, complete procedure to operate generators nonparalleled until landing. B. A copy of this AD inserted in the Airplane Flight Manual may be considered as an acceptable means of compliance with the required Airplane Flight Manual revision. C. Alternative means of compliance providing an equivalent level of safety may be used when approved by the Chief, Los Angeles Area Aircraft Certification Office, FAA Northwest Region. D. The installation of new voltage sensing relay components in accordance with Group I, Phase I of Part 2, in the Accomplishment Instructions of McDonnell Douglas DC-10 Service Bulletin 24-116, dated August 21, 1981, or later revisions approved by the Chief, Los Angeles Area Aircraft Certification Office, FAA Northwest Region may be accomplished in lieu of the Flight Manual Revision and test procedure specified in paragraphs (A) and (B) above; and constitutes terminating action for this AD. 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 these documents from the manufacturer may obtain copies upon request to the McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Director, Publications and Training, C1-750 (54-60). These documents also may be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108 or 4344 Donald Douglas Drive, Long Beach, California 90808. Amendment 39-4117 became effective August 10, 1981. This amendment becomes effective October 26, 1981. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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