AD 89-03-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Saab AB, Saab Aerosystems | 340A (SAAB SF340A) | Airworthiness Directives; SAAB-SCANIA Model SF-340A Series Airplanes |
Unsafe Condition
Erroneous airspeed readings due to ice in the pitot system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install water traps and insulation pads in the main and standby pitot systems in accordance with SAAB-Scania Service Bulletin SF340-34-056. An alternate means of compliance or adjustment of compliance time may be used if approved by the FAA. Special flight permits may be issued under FAR 21.197 and 21.199 to operate airplanes to a base for AD compliance.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 days after the effective date of this AD, unless previously accomplished.
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, serial numbers -003 through -138, inclusive, certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Pitot System
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_89-03-13.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 89-03-13 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; SAAB-SCANIA Model SF-340A Series Airplanes Subject: Pitot System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/15/1989 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Saab AB, Saab Aerosystems Model: 340A (SAAB SF340A) Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 89-03-13 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-6136 AD NUMBER: 89-03-13 SUBJECT HEADING: Airworthiness Directives; SAAB-SCANIA Model SF-340A Series Airplanes ACTION: SUMMARY: DATES: Effective March 15, 1989. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 89-03-13 SAAB-SCANIA: Amendment 39-6136. Applicability: Model SF-340A series airplanes, serial numbers -003 through -138, inclusive, certificated in any category. Compliance: Required within 30 days after the effective date of this AD, unless previously accomplished. To prevent erroneous airspeed readings due to ice in the pitot system, accomplish the following: A. Install water traps and insulation pads in the main and standby pitot systems, in accordance with SAAB-Scania Service Bulletin SF340-34-056, dated August 1, 1988. B. 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, Northwest Mountain Region. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who may add any comments and 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 for the accomplishment of 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, 17900 Pacific Highway South, Seattle, Washington, or at the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington. This amendment (39-6136, AD 89-03-13) becomes effective March 15, 1989. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_89-03-13.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 89-03-13 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; SAAB-SCANIA Model SF-340A Series Airplanes Subject: Pitot System Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/15/1989 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: 89-03-13 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-6136 AD NUMBER: 89-03-13 SUBJECT HEADING: Airworthiness Directives; SAAB-SCANIA Model SF-340A Series Airplanes ACTION: SUMMARY: DATES: Effective March 15, 1989. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 89-03-13 SAAB-SCANIA: Amendment 39-6136. Applicability: Model SF-340A series airplanes, serial numbers -003 through -138, inclusive, certificated in any category. Compliance: Required within 30 days after the effective date of this AD, unless previously accomplished. To prevent erroneous airspeed readings due to ice in the pitot system, accomplish the following: A. Install water traps and insulation pads in the main and standby pitot systems, in accordance with SAAB-Scania Service Bulletin SF340-34-056, dated August 1, 1988. B. 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, Northwest Mountain Region. NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who may add any comments and 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 for the accomplishment of 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, 17900 Pacific Highway South, Seattle, Washington, or at the Seattle Aircraft Certification Office, 9010 East Marginal Way South, Seattle, Washington. This amendment (39-6136, AD 89-03-13) becomes effective March 15, 1989. 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
2014-01-03 Recurring
final ruleAirworthiness Directives; Saab AB, Saab Aerosystems Airplanes
Unsafe Condition: Brushes wearing beyond their limits in the air conditioning motor, causing smoke, a burning odor, and possible fire in the flight deck and cabin.
2012-13-01
final ruleAirworthiness Directives; Saab AB, Saab Aerosystems Airplanes
Unsafe Condition: Wear of the elevator pushrods has occurred on some airplanes after extended time in service, leading to degradation of the pushrod which causes backlash between the rod end threads.
2011-27-05
final ruleAirworthiness Directives; Saab AB, Saab Aerosystems Airplanes
Unsafe Condition: Reports of broken wires and corroded connectors in the SAAB 340 main landing gear (MLG) emergency release system, which could inhibit the functioning of the separation bolt and prevent proper relea...
2011-09-02
final ruleAirworthiness Directives; Saab AB, Saab Aerosystems Model 340A (SAAB/SF340A) and SAAB 340B Airplanes Modified in Accordance With Supplemental Type Certificate (STC) ST00224WI-D, ST00146WI-D, or SA984GL-D
Unsafe Condition: Corrosion and cracking behind the external adapter plate of the antennae of certain damage-tolerant structure, which could result in reduced structural integrity and consequent rapid depressurizati...