AD 88-15-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Viking Air Limited | DHC-3 | Airworthiness Directives; DeHavilland Model DHC-3 Series Airplanes |
Unsafe Condition
Disengagement of the folding utility seat forward leg from the floor mounting rail could result in hazards to seat occupants from an inadequately restrained seat during a crash.
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Required Actions
Within 50 hours time-in-service after the effective date, and every 50 hours thereafter, attempt to move the lower end of each leg sideways into the open part of the keyhole slot using hand force. If the leg can be released, remove the seat from service until DeHavilland Modification No. 3/932 is incorporated. Repeat the check each time seats are moved from stowed to deployed position. Flightcrew members briefed on the procedure may perform the check, with required maintenance records kept as per applicable FARs. The checks are no longer required after installing Modification No. 3/932 per S/B 3/42 Rev A.
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Compliance Time
Within 50 hours time-in-service after the effective date of this AD, and at subsequent intervals of 50 hours TIS
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Affected Aircraft
DeHavilland Model DHC-3 (all serial numbers) airplanes certificated in any category.
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Federal Register Abstract
Utility Seat Forward Leg
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_88-15-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 88-15-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DeHavilland Model DHC-3 Series Airplanes Subject: Utility Seat Forward Leg Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/27/1988 Make: Viking Air Limited Model: DHC-3 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 88-15-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5978 AD NUMBER: 88-15-08 SUBJECT HEADING: Airworthiness Directives; DeHavilland Model DHC-3 Series Airplanes ACTION: SUMMARY: DATES: Effective August 27, 1988. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 88-15-08 DE HAVILLAND: Amendment 39-5978. Applies to Model DHC-3 (all serial numbers) airplanes certificated in any category. Compliance: Required as indicated, unless already accomplished in accordance with AD 85-11-01, Amendment 39-5071. To prevent disengagement of the folding utility seat forward leg from the floor mounting rail, which could result in hazards to seat occupants from an inadequately restrained seat during a crash, accomplish the following: (a) Within 50 hours time-in-service (TIS) after the effective date of this AD, and at subsequent intervals of 50 hours TIS, attempt to move the lower end of each leg sideways into the open part of the keyhole slot using as much force as can be exerted by hand. If the leg can be released from the keyhole slot, remove the seat from service until DeHavilland Modification No. 3/932 is incorporated. (This modification is contained in DeHavilland Service Bulletin No. 3/42, Revision A, dated September 18, 1987). (b) Repeat the check in Paragraph (a) of this AD each time the seats are moved from the stowed to deployed position. (c) The check required by Paragraph (b) of this AD may be accomplished by a flightcrew member, certificated under FAR 61 or FAR 63 rules, briefed on the procedure. NOTE: When the checks required by Paragraph (b) of this AD are accomplished by a flightcrew member pursuant to the restrictions specified in Paragraph (c) of this AD, maintenance records must be made as required by FAR 43.9 and those records must be maintained as required by FAR 91.173, 121.380, or 135.439 as applicable. (d) When Modification No. 3/932 is installed in accordance with the "ACCOMPLISHMENT INSTRUCTIONS" of DeHavilland S/B No. 3/42, Revision A, on each seat, subsequent checks required by this AD are no longer required. (e) An equivalent means of compliance may be used when approved by the Manager, New York Aircraft Certification Office, Federal Aviation Administration, FAA, New England Region, 181 South Franklin Avenue, Valley Stream, New York 11581. All persons affected by this directive may obtain copies of the documents referred to herein upon request to the DeHavilland Aircraft Company of Canada, a Division of Boeing of Canada, Ltd, Garratt Boulevard, Downsview, Ontario, Canada M3K 1Y5; Telephone (416) 633- 7310, or these documents may be examined at the FAA, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. This AD supersedes AD 85-11-01, Amendment 39-5071. This amendment, 39-5978, becomes effective on August 27, 1988. FOOTER:
Document Text
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AD Final Rules - DRS_88-15-08.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 88-15-08 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DeHavilland Model DHC-3 Series Airplanes Subject: Utility Seat Forward Leg Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/27/1988 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: 88-15-08 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5978 AD NUMBER: 88-15-08 SUBJECT HEADING: Airworthiness Directives; DeHavilland Model DHC-3 Series Airplanes ACTION: SUMMARY: DATES: Effective August 27, 1988. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 88-15-08 DE HAVILLAND: Amendment 39-5978. Applies to Model DHC-3 (all serial numbers) airplanes certificated in any category. Compliance: Required as indicated, unless already accomplished in accordance with AD 85-11-01, Amendment 39-5071. To prevent disengagement of the folding utility seat forward leg from the floor mounting rail, which could result in hazards to seat occupants from an inadequately restrained seat during a crash, accomplish the following: (a) Within 50 hours time-in-service (TIS) after the effective date of this AD, and at subsequent intervals of 50 hours TIS, attempt to move the lower end of each leg sideways into the open part of the keyhole slot using as much force as can be exerted by hand. If the leg can be released from the keyhole slot, remove the seat from service until DeHavilland Modification No. 3/932 is incorporated. (This modification is contained in DeHavilland Service Bulletin No. 3/42, Revision A, dated September 18, 1987). (b) Repeat the check in Paragraph (a) of this AD each time the seats are moved from the stowed to deployed position. (c) The check required by Paragraph (b) of this AD may be accomplished by a flightcrew member, certificated under FAR 61 or FAR 63 rules, briefed on the procedure. NOTE: When the checks required by Paragraph (b) of this AD are accomplished by a flightcrew member pursuant to the restrictions specified in Paragraph (c) of this AD, maintenance records must be made as required by FAR 43.9 and those records must be maintained as required by FAR 91.173, 121.380, or 135.439 as applicable. (d) When Modification No. 3/932 is installed in accordance with the "ACCOMPLISHMENT INSTRUCTIONS" of DeHavilland S/B No. 3/42, Revision A, on each seat, subsequent checks required by this AD are no longer required. (e) An equivalent means of compliance may be used when approved by the Manager, New York Aircraft Certification Office, Federal Aviation Administration, FAA, New England Region, 181 South Franklin Avenue, Valley Stream, New York 11581. All persons affected by this directive may obtain copies of the documents referred to herein upon request to the DeHavilland Aircraft Company of Canada, a Division of Boeing of Canada, Ltd, Garratt Boulevard, Downsview, Ontario, Canada M3K 1Y5; Telephone (416) 633- 7310, or these documents may be examined at the FAA, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. This AD supersedes AD 85-11-01, Amendment 39-5071. This amendment, 39-5978, becomes effective on August 27, 1988. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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