AD 81-14-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Short Brothers PLC | SD3-30 | Airworthiness Directives; SHORT BROTHERS LIMITED Model SD3-30 Series Airplanes |
Unsafe Condition
Gear-up landing caused by the main landing gear actuator's inability to unlock.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Rework the actuator by cutting a venting groove across the contoured face of the profiled washer in accordance with Short Brothers Limited Service Bulletin No. SD3-32-86 Rev. 2 dated March 4, 1981, or later FAA approved revisions, or in a manner acceptable to the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Region.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 500 landings after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Short Brothers PLC Model SD3-30 series airplanes with Menasco Manufacturing main landing gear actuator assembly P/N 17900, Serial numbers MMC-003 through MMC-111 installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Main Landing Gear Actuator Assembly
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_81-14-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 81-14-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; SHORT BROTHERS LIMITED Model SD3-30 Series Airplanes Subject: Main Landing Gear Actuator Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/08/1981 Make: Short Brothers PLC Model: SD3-30 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 81-14-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4152 AD NUMBER: 81-14-04 SUBJECT HEADING: Airworthiness Directives; SHORT BROTHERS LIMITED Model SD3-30 Series Airplanes ACTION: SUMMARY: DATES: Effective July 8, 1981. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 81-14-04 SHORT BROTHERS LIMITED: Amendment 39-4152. Applies to Model SD3-30 series airplanes, certificated in all categories, which have Menasco Manufacturing main landing gear actuator assembly P/N 17900, Serial numbers MMC-003 through MMC-111, installed. To prevent gear-up landing caused by the main landing gear actuator's inability to unlock, accomplish the following within 500 landings after the effective date of this AD, unless already accomplished: Rework the actuator by cutting a venting groove across the contoured face of the profiled washer in accordance with Short Brothers Limited Service Bulletin No. SD3-32-86 Rev. 2 dated March 4, 1981, or later FAA approved revisions, or in a manner acceptable to 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 these documents from the manufacturer may obtain copies upon request to the addresses listed above. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. This amendment becomes effective July 8, 1981. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_81-14-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 81-14-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; SHORT BROTHERS LIMITED Model SD3-30 Series Airplanes Subject: Main Landing Gear Actuator Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/08/1981 Make: Short Brothers PLC Model: SD3-30 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: 81-14-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4152 AD NUMBER: 81-14-04 SUBJECT HEADING: Airworthiness Directives; SHORT BROTHERS LIMITED Model SD3-30 Series Airplanes ACTION: SUMMARY: DATES: Effective July 8, 1981. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 81-14-04 SHORT BROTHERS LIMITED: Amendment 39-4152. Applies to Model SD3-30 series airplanes, certificated in all categories, which have Menasco Manufacturing main landing gear actuator assembly P/N 17900, Serial numbers MMC-003 through MMC-111, installed. To prevent gear-up landing caused by the main landing gear actuator's inability to unlock, accomplish the following within 500 landings after the effective date of this AD, unless already accomplished: Rework the actuator by cutting a venting groove across the contoured face of the profiled washer in accordance with Short Brothers Limited Service Bulletin No. SD3-32-86 Rev. 2 dated March 4, 1981, or later FAA approved revisions, or in a manner acceptable to 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 these documents from the manufacturer may obtain copies upon request to the addresses listed above. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108. This amendment becomes effective July 8, 1981. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
Related Airworthiness Directives
2015-16-04
final ruleAirworthiness Directives; Kidde Graviner
Unsafe Condition: A fire extinguisher failed to operate when the activation lever was pressed, potentially leading to failure in the event of a fire.
2010-24-06
final ruleAirworthiness Directives; Short Brothers PLC Model SD3 Airplanes
Unsafe Condition: Failure modes associated with an unsafe condition in the Fuel Tank System, as identified in the systems safety analysis, could lead to an unacceptable probability of ignition risk if specific tasks...
2009-21-10 R1
final ruleAirworthiness Directives; AVOX Systems and B/E Aerospace Oxygen Cylinder Assemblies, as Installed on Various Transport Airplanes
Unsafe Condition: The rupture of a high-pressure gaseous oxygen cylinder due to insufficient strength characteristics from improper heat treatment, which could cause structural damage, rapid decompression, damage to...
2007-08-09
final ruleAirworthiness Directives; Short Brothers Model SD3-60 SHERPA, SD3-SHERPA, SD3-30, and SD3-60 Airplanes
Unsafe Condition: Stress corrosion cracking of SAE-AISI 303 stainless steel material in MS 21260 type cable end fittings, initiated by pitting corrosion, leading to potential failure of control cables and loss of cr...