AD 48-08-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sierra Hotel Aero, Inc. | Navion (Army L-17A) | Airworthiness Directives; Navion Serial Numbers NAV-4-2 Through NAV-4-1110 |
Unsafe Condition
The fuel shutoff valve flexible control may buckle or misalign due to insufficient support, leading to inadequate valve opening when the control knob is pushed to the full 'ON' position.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the fuel shutoff valve flexible control support and add an additional support clip adjacent to the present clip at the valve end. Ensure proper rigging with valve detents and remove excess wire from the valve end to prevent snagging.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
as soon as possible but not later than April 1, 1948
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Affected Aircraft
Sierra Hotel Aero, Inc. Navion (Army L-17A) serial numbers NAV-4-2 through NAV-4-1110
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Fuel Valve Control Support Clip
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_48-08-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-08-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Navion Serial Numbers NAV-4-2 Through NAV-4-1110 Subject: Fuel Valve Control Support Clip Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Sierra Hotel Aero, Inc. Model: Navion (Army L-17A) Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 48-08-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-08-03 SUBJECT HEADING: Airworthiness Directives; Navion Serial Numbers NAV-4-2 Through NAV-4-1110 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-08-03 NAVION: Applies to Serial Numbers NAV-4-2 Through NAV-4-1110. To be accomplished as soon as possible but not later than April 1, 1948. To insure full opening of the fuel shutoff valve when the control knob is pushed to the full "ON" position, conduct the following inspection: Determine that the fuel shutoff valve flexible control is adequately supported along its length from the instrument panel to the shutoff valve to prevent buckling of the flexible control when it is moved to the "ON" position while valve motion is restrained by the fingers to simulate moderate valve friction. One additional support clip must be added adjacent to the present support clip at the valve end of the flexible control to prevent rotation of the present clip and resultant misalinement of the flexible control if the clip attaching screw should become loose. Other additional support clips along the flexible control may be necessary. Also determine that the control is properly rigged with respect to valve detents and that excess wire has been cut from the valve end of the control wire to prevent snagging of the end of the wire in the upholstery. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_48-08-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-08-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Navion Serial Numbers NAV-4-2 Through NAV-4-1110 Subject: Fuel Valve Control Support Clip Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Sierra Hotel Aero, Inc. Model: Navion (Army L-17A) 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: 48-08-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-08-03 SUBJECT HEADING: Airworthiness Directives; Navion Serial Numbers NAV-4-2 Through NAV-4-1110 ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-08-03 NAVION: Applies to Serial Numbers NAV-4-2 Through NAV-4-1110. To be accomplished as soon as possible but not later than April 1, 1948. To insure full opening of the fuel shutoff valve when the control knob is pushed to the full "ON" position, conduct the following inspection: Determine that the fuel shutoff valve flexible control is adequately supported along its length from the instrument panel to the shutoff valve to prevent buckling of the flexible control when it is moved to the "ON" position while valve motion is restrained by the fingers to simulate moderate valve friction. One additional support clip must be added adjacent to the present support clip at the valve end of the flexible control to prevent rotation of the present clip and resultant misalinement of the flexible control if the clip attaching screw should become loose. Other additional support clips along the flexible control may be necessary. Also determine that the control is properly rigged with respect to valve detents and that excess wire has been cut from the valve end of the control wire to prevent snagging of the end of the wire in the upholstery. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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