AD 2004-05-01 R1
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-3 | Airworthiness Directives; Bombardier Inc. Model Otter DHC-3 Airplanes |
Unsafe Condition
Elevator servo-tab
Required Actions
Prohibit operation unless STC SA01059SE (elevator servo-tab with redundant control linkage) is installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bombardier Inc. Model Otter DHC-3 airplanes with STC SA3777NM (Pratt and Whitney PT6A-34/-135 engine installation).
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Elevator servo-tab
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - 040501R1.pdf Copy URL Document Versions Feedback DetailsAttachments/Public Comments AD Number: 2004-05-01 R1 Document Type: AD Final Rules Docket Number: 2000-CE-73-AD Subject Heading: Airworthiness Directives; Bombardier Inc. Model Otter DHC-3 Airplanes Subject: Elevator servo-tab Status: Current Citation: Federal Register: April 22, 2004 (Volume 69, Number 78) Citation Publish Date: 04/22/2004 Effective Date: 05/25/2004 Make: Viking Air Limited Model: DHC-3 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: 2004-05-01 Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Automatic Zoom Actual Size Page Fit Page Width 50% 75% 100% 125% 150% 200% 300% 400% 125% of 6 1 [Federal Register: April 22, 2004 (Volume 69, Number 78)] [Rules and Regulations] [Page 21701-21703] From the Federal Register Online via GPO Access [wais.access.gpo.gov] [DOCID:fr22ap04-6] ––––––––––––––––––––––––––––––––––– DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. 2000-CE-73-AD; Amendment 39-13585; AD 2004-05-01 R1] RIN 2120-AA64 Airworthiness Directives; Bombardier Inc. Model Otter DHC-3 Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule; request for comments. ––––––––––––––––––––––––––––––––––– SUMMARY: The FAA is revising Airworthiness Directive (AD) 2004-05-01, which applies to certain Bombardier Inc. (formerly deHavilland Inc.) Model Otter DHC-3 airplanes that have turbine engines installed per one of three supplemental type certificates (STC). AD 2004-05-01 currently prohibits you from operating any affected airplane with these engine and propeller configurations unless a new STC for an elevator servo-tab with a redundant control linkage is installed. The FAA has since evaluated concerns, comments, and technical information related to all three STC configurations. Based on that evaluation, we have determined that further evaluation is necessary for the STCs owned by Texas Turbines Conversions, Inc., and Canada Turbine Conversions, Inc. Therefore, we are removing reference to these STCs from the AD, and the AD will only apply to those Bombardier Inc. airplanes that incorporate STC No. SA3777NM (A.M. Luton installation of Pratt and Whitney PT6A-34/-135 engine). After further evaluation, we may initiate rulemaking action regarding airplanes with the Texas Turbines Conversions, Inc., and Canada Turbine Conversions, Inc., STC configurations. DATES: This AD becomes effective on May 25, 2004. On April 20, 2004 (69 FR 9523, March 1, 2004), the Director of the Federal Register previously approved the incorporation by reference of certain publications listed in the regulation. We must receive any comments on this AD by June 29, 2004. ADDRESSES: Use one of the following to submit comments on this AD: • By mail: FAA, Central Region, Office of the Regional Counsel, Attention: Rules Docket No. 2000-CE-73-AD, 901 Locust, Room 506, Kansas City, Missouri 64106. • By fax: (816) 329-3771. • By e-mail: 9-ACE-7-Docket@faa.gov. Comments sent electronically must contain ''Docket No. 2000-CE-73-AD'' in the subject line. If you send comments electronically as attached electronic files, the files must be formatted in Microsoft Word 97 for Windows or ASCII. 2 You may get the service information identified in this AD A.M. Luton 3025 Eldridge Avenue, Bellingham, Washington, 98225; telephone (360) 671-7817; facsimile (360) 671-7820. You may view the AD docket at FAA, Central Region, Office of the Regional Counsel, Attention: Rules Docket No. 2000-CE-73-AD, 901 Locust, Room 506, Kansas City, Missouri 64106. Office hours are 8 a.m. to 4 p.m., Monday through Friday, except Federal holidays. FOR FURTHER INFORMATION CONTACT: For Technical Questions Relating to STC No. SA3777NM or STC No. SA01059SE: Richard Simonson, Aerospace Engineer, FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue, SW., Renton, Washington 98055; telephone: (425) 917-6507; facsimile: (425) 917-6590.For Administrative Questions Relating to This AD ACTION: Larry Werth, AD Coordinator, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-4147; facsimile: (816) 329-4149. SUPPLEMENTARY INFORMATION: Has FAA taken any action to this point? Several reports of situations where pilots of Bombardier Inc. Model Otter DHC-3 airplanes with installed turbine engines experienced buffeting of the elevators and declared an emergency and safely landed their aircraft caused FAA to issue AD 2004-05-01, Amendment 39-13493 (69 FR 9523, March 1, 2004). AD 2004-05-01 currently prohibits operation of any affected airplane that incorporates STC No. SA3777NM, STC No. SA09866SC, or STC No. SA09857SC without incorporation of STC No. SA01059SE. These STCs are as follows: • STC No. SA3777NM (A.M. Luton installation of Pratt and Whitney PT6A-34/-135 engine); • STC No. SA09866SC (Texas Turbines Conversions, Inc. installation of Honeywell TPE-331 engine); • STC No. SA09857SC (Canada Turbine Conversions, Inc. installation of Walter M601E-11 engine); and • STC No. SA01059SE (American Automotives, Inc. to incorporate a new elevator servo-tab and redundant control linkage). What has happened since AD 2004-05-01 to initiate this AD action? The FAA has since received and evaluated concerns, comments, and technical information related to all three STC configurations. Based on that evaluation, we have determined that further study is necessary for the STCs owned by Texas Turbines Conversions, Inc., and Canada Turbine Conversions, Inc. FAA's Determination and Requirements of the AD What has FAA decided? Therefore, we have determined that reference to the STCs owned by Texas Turbines Conversions, Inc., and Canada Turbine Conversions, Inc. should be removed from the AD. What does this AD require? This AD revises AD 2004-05-01 by only requiring the actions on those Bombardier Inc. Model Otter DHC-3 airplanes that incorporate STC No. SA3777NM (A.M. Luton installation of Pratt and Whitney PT6A-34/-135 engine) and do not have a new elevator servo- tab and redundant control linkage installed (American Automotives, Inc. STC No. SA01059SE). Does this mean the FAA cannot take regulatory action in the future? No. Removing the STCs owned by Texas Turbines Conversions, Inc., and Canada Turbine Conversions, Inc., from AD 2004- 05-01 does not prevent us from issuing other regulatory action in the future on airplanes that incorporate these STCs. It also does not commit us to any future action. We will take appropriate regulatory action if (after evaluation of the situation on these two STCs) we determine that there is an unsafe condition.
Document Text
Show stored source text (verify against official source)
AD Final Rules - 040501R1.pdf Copy URL Document Versions Feedback DetailsAttachments/Public Comments AD Number: 2004-05-01 R1 Document Type: AD Final Rules Docket Number: 2000-CE-73-AD Subject Heading: Airworthiness Directives; Bombardier Inc. Model Otter DHC-3 Airplanes Subject: Elevator servo-tab Status: Current Citation: Federal Register: April 22, 2004 (Volume 69, Number 78) Citation Publish Date: 04/22/2004 Effective Date: 05/25/2004 Make: Viking Air Limited Model: DHC-3 Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: 2004-05-01 Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Automatic Zoom Actual Size Page Fit Page Width 50% 75% 100% 125% 150% 200% 300% 400% 125% of 6 1 [Federal Register: April 22, 2004 (Volume 69, Number 78)] [Rules and Regulations] [Page 21701-21703] From the Federal Register Online via GPO Access [wais.access.gpo.gov] [DOCID:fr22ap04-6] ––––––––––––––––––––––––––––––––––– DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. 2000-CE-73-AD; Amendment 39-13585; AD 2004-05-01 R1] RIN 2120-AA64 Airworthiness Directives; Bombardier Inc. Model Otter DHC-3 Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule; request for comments. ––––––––––––––––––––––––––––––––––– SUMMARY: The FAA is revising Airworthiness Directive (AD) 2004-05-01, which applies to certain Bombardier Inc. (formerly deHavilland Inc.) Model Otter DHC-3 airplanes that have turbine engines installed per one of three supplemental type certificates (STC). AD 2004-05-01 currently prohibits you from operating any affected airplane with these engine and propeller configurations unless a new STC for an elevator servo-tab with a redundant control linkage is installed. The FAA has since evaluated concerns, comments, and technical information related to all three STC configurations. Based on that evaluation, we have determined that further evaluation is necessary for the STCs owned by Texas Turbines Conversions, Inc., and Canada Turbine Conversions, Inc. Therefore, we are removing reference to these STCs from the AD, and the AD will only apply to those Bombardier Inc. airplanes that incorporate STC No. SA3777NM (A.M. Luton installation of Pratt and Whitney PT6A-34/-135 engine). After further evaluation, we may initiate rulemaking action regarding airplanes with the Texas Turbines Conversions, Inc., and Canada Turbine Conversions, Inc., STC configurations. DATES: This AD becomes effective on May 25, 2004. On April 20, 2004 (69 FR 9523, March 1, 2004), the Director of the Federal Register previously approved the incorporation by reference of certain publications listed in the regulation. We must receive any comments on this AD by June 29, 2004. ADDRESSES: Use one of the following to submit comments on this AD: • By mail: FAA, Central Region, Office of the Regional Counsel, Attention: Rules Docket No. 2000-CE-73-AD, 901 Locust, Room 506, Kansas City, Missouri 64106. • By fax: (816) 329-3771. • By e-mail: 9-ACE-7-Docket@faa.gov. Comments sent electronically must contain ''Docket No. 2000-CE-73-AD'' in the subject line. If you send comments electronically as attached electronic files, the files must be formatted in Microsoft Word 97 for Windows or ASCII. 2 You may get the service information identified in this AD A.M. Luton 3025 Eldridge Avenue, Bellingham, Washington, 98225; telephone (360) 671-7817; facsimile (360) 671-7820. You may view the AD docket at FAA, Central Region, Office of the Regional Counsel, Attention: Rules Docket No. 2000-CE-73-AD, 901 Locust, Room 506, Kansas City, Missouri 64106. Office hours are 8 a.m. to 4 p.m., Monday through Friday, except Federal holidays. FOR FURTHER INFORMATION CONTACT: For Technical Questions Relating to STC No. SA3777NM or STC No. SA01059SE: Richard Simonson, Aerospace Engineer, FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue, SW., Renton, Washington 98055; telephone: (425) 917-6507; facsimile: (425) 917-6590.For Administrative Questions Relating to This AD ACTION: Larry Werth, AD Coordinator, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-4147; facsimile: (816) 329-4149. SUPPLEMENTARY INFORMATION: Has FAA taken any action to this point? Several reports of situations where pilots of Bombardier Inc. Model Otter DHC-3 airplanes with installed turbine engines experienced buffeting of the elevators and declared an emergency and safely landed their aircraft caused FAA to issue AD 2004-05-01, Amendment 39-13493 (69 FR 9523, March 1, 2004). AD 2004-05-01 currently prohibits operation of any affected airplane that incorporates STC No. SA3777NM, STC No. SA09866SC, or STC No. SA09857SC without incorporation of STC No. SA01059SE. These STCs are as follows: • STC No. SA3777NM (A.M. Luton installation of Pratt and Whitney PT6A-34/-135 engine); • STC No. SA09866SC (Texas Turbines Conversions, Inc. installation of Honeywell TPE-331 engine); • STC No. SA09857SC (Canada Turbine Conversions, Inc. installation of Walter M601E-11 engine); and • STC No. SA01059SE (American Automotives, Inc. to incorporate a new elevator servo-tab and redundant control linkage). What has happened since AD 2004-05-01 to initiate this AD action? The FAA has since received and evaluated concerns, comments, and technical information related to all three STC configurations. Based on that evaluation, we have determined that further study is necessary for the STCs owned by Texas Turbines Conversions, Inc., and Canada Turbine Conversions, Inc. FAA's Determination and Requirements of the AD What has FAA decided? Therefore, we have determined that reference to the STCs owned by Texas Turbines Conversions, Inc., and Canada Turbine Conversions, Inc. should be removed from the AD. What does this AD require? This AD revises AD 2004-05-01 by only requiring the actions on those Bombardier Inc. Model Otter DHC-3 airplanes that incorporate STC No. SA3777NM (A.M. Luton installation of Pratt and Whitney PT6A-34/-135 engine) and do not have a new elevator servo- tab and redundant control linkage installed (American Automotives, Inc. STC No. SA01059SE). Does this mean the FAA cannot take regulatory action in the future? No. Removing the STCs owned by Texas Turbines Conversions, Inc., and Canada Turbine Conversions, Inc., from AD 2004- 05-01 does not prevent us from issuing other regulatory action in the future on airplanes that incorporate these STCs. It also does not commit us to any future action. We will take appropriate regulatory action if (after evaluation of the situation on these two STCs) we determine that there is an unsafe condition.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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