AD 91-14-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Saab AB, Saab Aerosystems | SAAB 340B | Airworthiness Directives; SAAB-SCANIA Model SF-340A and SAAB 340B Series Airplanes |
| aircraft | Saab AB, Saab Aerosystems | 340A (SAAB SF340A) | Airworthiness Directives; SAAB-SCANIA Model SF-340A and SAAB 340B Series Airplanes |
Unsafe Condition
Electrical fire and smoke in the cockpit due to FD 574-24 wire from terminal block 301VT BH:C to connector 203VU P33:A1 in the autopilot electrical system.
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Required Actions
Replace the FD 574-24 wire with a 20 AWG size wire per SAAB Service Bulletin 340-34-068. Alternative methods or compliance time adjustments may be approved by the FAA Manager, Standardization Branch. Special flight permits under FAR 21.197 and 21.199 may be issued for AD compliance operations.
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Compliance Time
within 180 days after the effective date of this AD, unless previously accomplished
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Affected Aircraft
SAAB-SCANIA Model SF-340A (Serial Numbers 079 through 159) and SAAB 340B (Serial Numbers 160 through 199)
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Federal Register Abstract
Electrical System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_91-14-17.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 91-14-17 Document Type: AD Final Rules Docket Number: 91-NM-35-AD Subject Heading: Airworthiness Directives; SAAB-SCANIA Model SF-340A and SAAB 340B Series Airplanes Subject: Electrical System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/06/1991 Make: Saab AB, Saab Aerosystems Model: SAAB 340B | 340A (SAAB SF340A) Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 91-14-17 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-NM-35-AD AMENDMENT: 39-7058 AD NUMBER: 91-14-17 SUBJECT HEADING: Airworthiness Directives; SAAB-SCANIA Model SF-340A and SAAB 340B Series Airplanes ACTION: Final rule SUMMARY: DATES: Effective August 6, 1991. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 91-14-17 SAAB-SCANIA: Amendment 39-7058. Docket No. 91-NM-35-AD. Applicability: Model SF-340A series airplanes, Serial Numbers 079 through 159; and Model SAAB 340B series airplanes, Serial Numbers 160 through 199; certificated in any category. Compliance: Required within 180 days after the effective date of this AD, unless previously accomplished. To prevent an electrical fire and smoke in the cockpit, accomplish the following: A. Replace the FD 574-24 wire from terminal block 301VT BH:C to connector 203VU P33:A1 in the autopilot electrical system with a 20 AWG size wire, in accordance with SAAB Service Bulletin 340-34-068, dated November 9, 1990. B. An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM- 113, FAA, Transport Airplane Directorate. NOTE: The request should be forwarded through an FAA Principal Avionics Inspector, who may concur or comment then send it to the Manager, Standardization Branch, ANM-113. C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. D. The replacement requirements shall be done in accordance with SAAB Service Bulletin 340-34-068, dated November 9, 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 SAAB- Scania AB, Product Support, S-581.88, Linkoping, Sweden. Copies may be inspected at the FAA, Transport Airplane Directorate, Renton, Washington; or at the Office of the Federal Register, 1100 L Street N.W., Room 8401, Washington, D.C. This amendment (39-7058, AD 91-14-17) becomes effective on August 6, 1991. FOOTER:
Document Text
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AD Final Rules - DRS_91-14-17.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 91-14-17 Document Type: AD Final Rules Docket Number: 91-NM-35-AD Subject Heading: Airworthiness Directives; SAAB-SCANIA Model SF-340A and SAAB 340B Series Airplanes Subject: Electrical System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/06/1991 Make: Saab AB, Saab Aerosystems Model: SAAB 340B | 340A (SAAB SF340A) 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: 91-14-17 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 91-NM-35-AD AMENDMENT: 39-7058 AD NUMBER: 91-14-17 SUBJECT HEADING: Airworthiness Directives; SAAB-SCANIA Model SF-340A and SAAB 340B Series Airplanes ACTION: Final rule SUMMARY: DATES: Effective August 6, 1991. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 91-14-17 SAAB-SCANIA: Amendment 39-7058. Docket No. 91-NM-35-AD. Applicability: Model SF-340A series airplanes, Serial Numbers 079 through 159; and Model SAAB 340B series airplanes, Serial Numbers 160 through 199; certificated in any category. Compliance: Required within 180 days after the effective date of this AD, unless previously accomplished. To prevent an electrical fire and smoke in the cockpit, accomplish the following: A. Replace the FD 574-24 wire from terminal block 301VT BH:C to connector 203VU P33:A1 in the autopilot electrical system with a 20 AWG size wire, in accordance with SAAB Service Bulletin 340-34-068, dated November 9, 1990. B. An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM- 113, FAA, Transport Airplane Directorate. NOTE: The request should be forwarded through an FAA Principal Avionics Inspector, who may concur or comment then send it to the Manager, Standardization Branch, ANM-113. C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. D. The replacement requirements shall be done in accordance with SAAB Service Bulletin 340-34-068, dated November 9, 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 SAAB- Scania AB, Product Support, S-581.88, Linkoping, Sweden. Copies may be inspected at the FAA, Transport Airplane Directorate, Renton, Washington; or at the Office of the Federal Register, 1100 L Street N.W., Room 8401, Washington, D.C. This amendment (39-7058, AD 91-14-17) becomes effective on August 6, 1991. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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