AD 77-23-10
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | K & L Soaring LLC | SGS 2-33 | Airworthiness Directives; Schweizer Models SGS 2-33, SGS 2-33A, and 2-33AK Gliders |
| aircraft | K & L Soaring LLC | SGS 2-33A | Airworthiness Directives; Schweizer Models SGS 2-33, SGS 2-33A, and 2-33AK Gliders |
| aircraft | K & L Soaring LLC | SGS 2-33AK | Airworthiness Directives; Schweizer Models SGS 2-33, SGS 2-33A, and 2-33AK Gliders |
Unsafe Condition
Cracked vertical stabilizer spar-to-fuselage attachment bolts and spar web or elongated holes in the vertical stabilizer spar-to-fuselage attachment structure.
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Required Actions
Within 25 hours in service after the effective date, inspect the vertical stabilizer spar-to-fuselage attachment bolts and spar web per Schweizer Service Bulletin No. 102-33-2 or equivalent. Repeat inspections every 100 hours in service or six months, whichever comes first. Repair or replace defective parts before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 25 hours in service after the effective date, unless previously accomplished within the last 75 hours in service
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Schweizer Models SGS 2-33, SGS 2-33A, and 2-33AK Gliders
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Spar Web and Bolts
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_77-23-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-23-10 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Schweizer Models SGS 2-33, SGS 2-33A, and 2-33AK Gliders Subject: Spar Web and Bolts Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/21/1978 Make: K & L Soaring LLC Model: SGS 2-33 | SGS 2-33A | SGS 2-33AK Product Type: Aircraft Product Subtype: Glider Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 77-23-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3241 AD NUMBER: 77-23-10 SUBJECT HEADING: Airworthiness Directives; Schweizer Models SGS 2-33, SGS 2-33A, and 2-33AK Gliders ACTION: SUMMARY: DATES: Effective June 21, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-23-10 SCHWEIZER: Amendment 39-3078, as amended by Amendment 39-3241. Applies to all Schweizer SGS 2-33, 2-33A and 2-33AK Gliders. Compliance required as indicated. (a) Within the next 25 hours in service, after the effective date of this AD, unless previously accomplished within the last 75 hours in service, visually inspect the vertical stabilizer spar-to-fuselage attachment bolts and spar web in accordance with Schweizer Service Bulletin No. 102-33-2, dated September 2, 1977, or an approved equivalent inspection. (b) Repeat the inspection specified in (a) at intervals not to exceed 100 hours in service or six months, whichever occurs first, from the last such inspection. (c) Before further flight, repair cracked parts or elongated holes in accordance with the above Schweizer service bulletin, or with an approved equivalent repair, or replace defective parts with new parts of the same part number or with approved equivalent parts. (d) Report all defects found during compliance with this AD to the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region (Reporting Approved by the Office of Management and Budget under OMB No. CAR0174). (e) Recommended repairs noted in paragraph 1.g. and 1.h. of the service bulletin and equivalent inspections, repairs, alterations or parts must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. (f) The repetitive inspection required by (b) may be discontinued when an undamaged vertical stabilizer spar is altered in accordance with paragraph (3) of Schweizer Service Bulletin No. 102-33-2, dated March 17, 1978, or an equivalent. (g) Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the inspection interval specified in this AD. Amendment 39-3078 was effective November 18, 1977. This amendment 39-3241 is effective June 21, 1978. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_77-23-10.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 77-23-10 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Schweizer Models SGS 2-33, SGS 2-33A, and 2-33AK Gliders Subject: Spar Web and Bolts Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 06/21/1978 Make: K & L Soaring LLC Model: SGS 2-33 | SGS 2-33A | SGS 2-33AK 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: 77-23-10 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-3241 AD NUMBER: 77-23-10 SUBJECT HEADING: Airworthiness Directives; Schweizer Models SGS 2-33, SGS 2-33A, and 2-33AK Gliders ACTION: SUMMARY: DATES: Effective June 21, 1978. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 77-23-10 SCHWEIZER: Amendment 39-3078, as amended by Amendment 39-3241. Applies to all Schweizer SGS 2-33, 2-33A and 2-33AK Gliders. Compliance required as indicated. (a) Within the next 25 hours in service, after the effective date of this AD, unless previously accomplished within the last 75 hours in service, visually inspect the vertical stabilizer spar-to-fuselage attachment bolts and spar web in accordance with Schweizer Service Bulletin No. 102-33-2, dated September 2, 1977, or an approved equivalent inspection. (b) Repeat the inspection specified in (a) at intervals not to exceed 100 hours in service or six months, whichever occurs first, from the last such inspection. (c) Before further flight, repair cracked parts or elongated holes in accordance with the above Schweizer service bulletin, or with an approved equivalent repair, or replace defective parts with new parts of the same part number or with approved equivalent parts. (d) Report all defects found during compliance with this AD to the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region (Reporting Approved by the Office of Management and Budget under OMB No. CAR0174). (e) Recommended repairs noted in paragraph 1.g. and 1.h. of the service bulletin and equivalent inspections, repairs, alterations or parts must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. (f) The repetitive inspection required by (b) may be discontinued when an undamaged vertical stabilizer spar is altered in accordance with paragraph (3) of Schweizer Service Bulletin No. 102-33-2, dated March 17, 1978, or an equivalent. (g) Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the inspection interval specified in this AD. Amendment 39-3078 was effective November 18, 1977. This amendment 39-3241 is effective June 21, 1978. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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