AD 75-16-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Pilatus Aircraft Limited | B4-PC11 | Airworthiness Directives; Pilatus Model B4-PC11 Gliders |
Unsafe Condition
Rudder control cables may experience chaffing, jamming, or separation adjacent to the crotch strap attachment brackets.
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Required Actions
Visually inspect rudder control cables for chaffing near the crotch strap attachment brackets and repair or replace as required per Pilatus Maintenance Manual or FAA-approved equivalent. Install polyurethane foam block P/N 112.50.11.065 on the pilot seat underside to cover the crotch strap bracket per Pilatus Service Bulletin No. 1002 or FAA-approved equivalent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 hours' time in service after the effective date of this AD for inspection and repair/replace; within 25 hours' time in service after the effective date for installing the foam block.
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Affected Aircraft
Pilatus Aircraft Limited Model B4-PC11 gliders, serial numbers 141 and subsequent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Rudder Control Cables
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_75-16-11.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-16-11 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Pilatus Model B4-PC11 Gliders Subject: Rudder Control Cables Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/29/1975 Make: Pilatus Aircraft Limited Model: B4-PC11 Product Type: Aircraft Product Subtype: Glider Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-16-11 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2284 AD NUMBER: 75-16-11 SUBJECT HEADING: Airworthiness Directives; Pilatus Model B4-PC11 Gliders ACTION: SUMMARY: DATES: Effective July 29, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-16-11 PILATUS AIRCRAFT LTD: Amdt. 39-2284. Applies to B4-PC11 gliders, serial numbers 141 and subsequent, certificated in all categories. Compliance is required as indicated. To prevent rudder cable chaffing, jamming, or separation accomplish the following: (a) Within 10 hours' time in service after the effective date of this AD, unless already accomplished, visually inspect the rudder control cables for chaffing in that portion adjacent to the crotch strap attachment brackets and repair, or replace as required in accordance with the Pilatus B4- PC11 Maintenance Manual or an FAA-approved equivalent. (b) Within 25 hours' time in service after the effective date of this AD, unless already accomplished, install a polyurethane foam block P/N 112.50.11.065 on the underside of the pilot seat to provide a grooved channel to cover the crotch strap attachment bracket in accordance with the accomplishment instructions set forth in Pilatus Aircraft Service Bulletin No. 1002 dated May 1974, or an FAA-approved equivalent. This amendment becomes effective July 29, 1975. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_75-16-11.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 75-16-11 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Pilatus Model B4-PC11 Gliders Subject: Rudder Control Cables Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 07/29/1975 Make: Pilatus Aircraft Limited Model: B4-PC11 Product Type: Aircraft Product Subtype: Glider Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 75-16-11 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2284 AD NUMBER: 75-16-11 SUBJECT HEADING: Airworthiness Directives; Pilatus Model B4-PC11 Gliders ACTION: SUMMARY: DATES: Effective July 29, 1975. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 75-16-11 PILATUS AIRCRAFT LTD: Amdt. 39-2284. Applies to B4-PC11 gliders, serial numbers 141 and subsequent, certificated in all categories. Compliance is required as indicated. To prevent rudder cable chaffing, jamming, or separation accomplish the following: (a) Within 10 hours' time in service after the effective date of this AD, unless already accomplished, visually inspect the rudder control cables for chaffing in that portion adjacent to the crotch strap attachment brackets and repair, or replace as required in accordance with the Pilatus B4- PC11 Maintenance Manual or an FAA-approved equivalent. (b) Within 25 hours' time in service after the effective date of this AD, unless already accomplished, install a polyurethane foam block P/N 112.50.11.065 on the underside of the pilot seat to provide a grooved channel to cover the crotch strap attachment bracket in accordance with the accomplishment instructions set forth in Pilatus Aircraft Service Bulletin No. 1002 dated May 1974, or an FAA-approved equivalent. This amendment becomes effective July 29, 1975. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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