AD 90-17-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Saab AB, Saab Aerosystems | 340A (SAAB SF340A) | Airworthiness Directives: SAAB-SCANIA Model SF-340A Series Airplanes |
Unsafe Condition
Moisture accumulation in the elevator deicer boot system could lead to reduced deicing effectiveness or system malfunction.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the empennage deicer boot pneumatic system per SAAB Service Bulletin SF340-30-008, Rev 1; modify the nacelle inlet protection device exhaust nozzle per SF340-54-002, Rev 1; and drain/check the elevator deicing system drain traps every 7 days per SB SF340-30-008, Rev 2.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 60 days after March 13, 1986 (for modifications) and within 7 days after September 17, 1990 (for initial drain checks), with subsequent checks not exceeding 7 days.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Saab AB, Saab Aerosystems Model SF-340A series airplanes, all serial numbers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Elevator Deicing System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_90-17-14.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 90-17-14 Document Type: AD Final Rules Docket Number: 90-NM-55-AD Subject Heading: Airworthiness Directives: SAAB-SCANIA Model SF-340A Series Airplanes Subject: Elevator Deicing System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/17/1990 Make: Saab AB, Saab Aerosystems Model: 340A (SAAB SF340A) Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 90-17-14 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 90-NM-55-AD AMENDMENT: 39-6694 AD NUMBER: 90-17-14 SUBJECT HEADING: Airworthiness Directives: SAAB-SCANIA Model SF-340A Series Airplanes ACTION: SUMMARY: DATES: Effective September 17, 1990. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 90-17-14 SAAB-SCANIA: Amendment 39-6694. Docket No. 90-NM-55-AD. Applicability: All Model SF-340A series airplanes, certificated in any category. Compliance: Required as indicated, unless previously accomplished. To prevent moisture accumulation in the elevator deicer boot system, accomplish the following: A. Within 60 days after March 13, 1986 (the effective date of AD 86- 04-05, Amendment 39-5229), accomplish the following: 1. Modify the empennage deicer boot pneumatic system in accordance with SAAB Service Bulletin SF340-30-008, Revision 1, dated February 11, 1985; and 2. Modify the nacelle inlet protection device exhaust nozzle in accordance with SAAB Service Bulletin SF340-54-002, Revision 1, dated April 3, 1985. B. Within 7 days after the effective date of this amendment, and thereafter at intervals not to exceed 7 days, drain and check the two elevator deicing system drain traps in accordance with paragraph D.(2) of SAAB Service Bulletin SF340-30-008, Revision 2, dated December 8, 1989. C. An alternate means 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 submitted directly to the Manager, Standardization Branch, ANM-113, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Manager, Standardization Branch, ANM-113. D. 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. All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to SAAB-Scania, Product Support, S.58188, Linkoping, Sweden. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue, S.W., Renton, Washington. This amendment supersedes Amendment 39-5229, AD 86-04-05. This amendment (39-6694, AD 90-17-14) becomes effective on September 17, 1990. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_90-17-14.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 90-17-14 Document Type: AD Final Rules Docket Number: 90-NM-55-AD Subject Heading: Airworthiness Directives: SAAB-SCANIA Model SF-340A Series Airplanes Subject: Elevator Deicing System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 09/17/1990 Make: Saab AB, Saab Aerosystems Model: 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: 90-17-14 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: 90-NM-55-AD AMENDMENT: 39-6694 AD NUMBER: 90-17-14 SUBJECT HEADING: Airworthiness Directives: SAAB-SCANIA Model SF-340A Series Airplanes ACTION: SUMMARY: DATES: Effective September 17, 1990. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 90-17-14 SAAB-SCANIA: Amendment 39-6694. Docket No. 90-NM-55-AD. Applicability: All Model SF-340A series airplanes, certificated in any category. Compliance: Required as indicated, unless previously accomplished. To prevent moisture accumulation in the elevator deicer boot system, accomplish the following: A. Within 60 days after March 13, 1986 (the effective date of AD 86- 04-05, Amendment 39-5229), accomplish the following: 1. Modify the empennage deicer boot pneumatic system in accordance with SAAB Service Bulletin SF340-30-008, Revision 1, dated February 11, 1985; and 2. Modify the nacelle inlet protection device exhaust nozzle in accordance with SAAB Service Bulletin SF340-54-002, Revision 1, dated April 3, 1985. B. Within 7 days after the effective date of this amendment, and thereafter at intervals not to exceed 7 days, drain and check the two elevator deicing system drain traps in accordance with paragraph D.(2) of SAAB Service Bulletin SF340-30-008, Revision 2, dated December 8, 1989. C. An alternate means 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 submitted directly to the Manager, Standardization Branch, ANM-113, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Manager, Standardization Branch, ANM-113. D. 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. All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to SAAB-Scania, Product Support, S.58188, Linkoping, Sweden. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue, S.W., Renton, Washington. This amendment supersedes Amendment 39-5229, AD 86-04-05. This amendment (39-6694, AD 90-17-14) becomes effective on September 17, 1990. FOOTER:
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Retrieved: Apr 8, 2026
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