AD 92-08-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-3 | Airworthiness Directives; DE HAVILLAND Model DHC-3 Otter Airplanes |
Unsafe Condition
Loss of control of the airplane caused by inadvertent engine shutoff.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the PT6A-135/135A engine to ensure installation and correct assembly of fuel condition lever lock part number 20037-18 per Servo-Aero SB001. If not installed or assembled correctly, install the lock prior to further flight per SB001. Special flight permits may be obtained under FAR 21.197/21.199 to reach a location for compliance.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 hours time-in-service after May 18, 1992, unless already accomplished.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
DE HAVILLAND Model DHC-3 Otter airplanes (all serial numbers) with Servo-Aero Engineering 20000 Series Kit on Pratt & Whitney PT6A-135/135A engine.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Fuel Condition Lever Lock
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_92-08-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-08-08 Document Type: AD Final Rules Docket Number: 91-CE-73-AD Subject Heading: Airworthiness Directives; DE HAVILLAND Model DHC-3 Otter Airplanes Subject: Fuel Condition Lever Lock Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/18/1992 Make: Viking Air Limited Model: DHC-3 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 92-08-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-CE-73-AD AMENDMENT: 39-8219 AD NUMBER: 92-08-08 SUBJECT HEADING: Airworthiness Directives; DE HAVILLAND Model DHC-3 Otter Airplanes ACTION: SUMMARY: DATES: Effective May 18, 1992. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-08-08 DE HAVILLAND: Amendment 39-8219; Docket No. 91-CE-73-AD. Applicability: Model DHC-3 Otter airplanes (all serial numbers) that have a Servo-Aero Engineering 20000 Series Kit installed on a Pratt & Whitney PT6A-135/135A engine, certificated in any category. Compliance: Required within the next 100 hours time-in-service after the effective date of this AD, unless already accomplished. To prevent loss of control of the airplane caused by inadvertent engine shutoff, accomplish the following: (a) Visually inspect the Pratt & Whitney PT6A-135/135A engine to ensure that a fuel condition lever lock, part number (P/N) 20037-18, is installed and ensure that it is correctly assembled in accordance with the instructions in Servo-Aero Service Bulletin SB001, dated July 24, 1990. (b) If a fuel condition lever lock is not installed or is not assembled in accordance with the instructions in Servo-Aero Service Bulletin SB001, dated July 24, 1990, prior to further flight, install a fuel condition lever position lock, (P/N) 20037-18, in accordance with the instructions in Servo-Aero Service Bulletin SB001, dated July 24, 1990. (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (d) An alternative method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Los Angeles Aircraft Certification Office, 3229 E. Spring Street, Long Beach, California 90806-2425. The request should be forwarded through an FAA Maintenance Inspector, who may add comments and then send it to the Manager, Los Angeles Aircraft Certification Office. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles Aircraft Certification Office. (e) The installation required by this AD shall be done in accordance with Servo-Aero Service Bulletin SB001, dated July 24, 1990. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Servo-Aero Engineering Inc., 37 Mortensen Avenue, Salinas, California 93905. Copies may be inspected at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 1100 L Street, NW, Room 8401, Washington, DC. (f) This amendment (39-8219) becomes effective on May 18, 1992. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_92-08-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 92-08-08 Document Type: AD Final Rules Docket Number: 91-CE-73-AD Subject Heading: Airworthiness Directives; DE HAVILLAND Model DHC-3 Otter Airplanes Subject: Fuel Condition Lever Lock Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/18/1992 Make: Viking Air Limited Model: DHC-3 Product Type: Aircraft Product Subtype: Small 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: 92-08-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-CE-73-AD AMENDMENT: 39-8219 AD NUMBER: 92-08-08 SUBJECT HEADING: Airworthiness Directives; DE HAVILLAND Model DHC-3 Otter Airplanes ACTION: SUMMARY: DATES: Effective May 18, 1992. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 92-08-08 DE HAVILLAND: Amendment 39-8219; Docket No. 91-CE-73-AD. Applicability: Model DHC-3 Otter airplanes (all serial numbers) that have a Servo-Aero Engineering 20000 Series Kit installed on a Pratt & Whitney PT6A-135/135A engine, certificated in any category. Compliance: Required within the next 100 hours time-in-service after the effective date of this AD, unless already accomplished. To prevent loss of control of the airplane caused by inadvertent engine shutoff, accomplish the following: (a) Visually inspect the Pratt & Whitney PT6A-135/135A engine to ensure that a fuel condition lever lock, part number (P/N) 20037-18, is installed and ensure that it is correctly assembled in accordance with the instructions in Servo-Aero Service Bulletin SB001, dated July 24, 1990. (b) If a fuel condition lever lock is not installed or is not assembled in accordance with the instructions in Servo-Aero Service Bulletin SB001, dated July 24, 1990, prior to further flight, install a fuel condition lever position lock, (P/N) 20037-18, in accordance with the instructions in Servo-Aero Service Bulletin SB001, dated July 24, 1990. (c) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (d) An alternative method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Los Angeles Aircraft Certification Office, 3229 E. Spring Street, Long Beach, California 90806-2425. The request should be forwarded through an FAA Maintenance Inspector, who may add comments and then send it to the Manager, Los Angeles Aircraft Certification Office. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles Aircraft Certification Office. (e) The installation required by this AD shall be done in accordance with Servo-Aero Service Bulletin SB001, dated July 24, 1990. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Servo-Aero Engineering Inc., 37 Mortensen Avenue, Salinas, California 93905. Copies may be inspected at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 1100 L Street, NW, Room 8401, Washington, DC. (f) This amendment (39-8219) becomes effective on May 18, 1992. 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
2025-17-08 Recurring
final ruleAirworthiness Directives; Viking Air Limited (Type Certificate Previously Held by Bombardier Inc. and de Havilland, Inc.) Airplanes
Unsafe Condition: a missing stabilizer actuator lock ring, which can cause the stabilizer actuator clamp nut to separate from the stabilizer barrel by unthreading, resulting in a reduction or loss of pitch control d...
2023-22-17
final ruleAirworthiness Directives; Viking Air Limited (Type Certificate Previously Held by Bombardier Inc. and de Havilland, Inc.) Airplanes
Unsafe Condition: Cracking of the engine mount pickup fittings can result in failure of the fitting, leading to a loose connection of the engine mount ring and consequent reduced control of the airplane.
2023-18-03
final ruleAirworthiness Directives; Viking Air Limited (Type Certificated Previously Held by Bombardier Inc. and de Havilland, Inc.) Airplanes
Unsafe Condition: Corrosion, wear, and fatigue-related degradation in aging aircraft, which could lead to structural failure with consequent loss of control of the airplane.
2023-10-02
final ruleAirworthiness Directives; Transport and Commuter Category Airplanes
Unsafe Condition: Radio altimeter anomalies that are undetected by the automation or pilot, particularly close to the ground (e.g., landing flare), could lead to loss of continued safe flight and landing. Additional...