AD 68-21-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 65-90 | Airworthiness Directives; BEECHCRAFT Models 65-90, 65-A90, 65-B90 and 65-A90-1 Aircraft |
| aircraft | Textron Aviation Inc. | 65-A90 | Airworthiness Directives; BEECHCRAFT Models 65-90, 65-A90, 65-B90 and 65-A90-1 Aircraft |
| aircraft | Textron Aviation Inc. | 65-A90-1 | Airworthiness Directives; BEECHCRAFT Models 65-90, 65-A90, 65-B90 and 65-A90-1 Aircraft |
| aircraft | Textron Aviation Inc. | B90 | Airworthiness Directives; BEECHCRAFT Models 65-90, 65-A90, 65-B90 and 65-A90-1 Aircraft |
Unsafe Condition
Ice damage to engine when operating in icing conditions above 15,000 feet MSL.
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Required Actions
Install seal strips and a spring lockdown assembly on the Inertial Separator Vane and an automatic ignition (re-light) system per Beechcraft Service Instructions #0115-010. Equip the airplane with the applicable FAA Flight Manual as specified in the same service instructions. Maintain Emergency Order Amending Type Certificate No. 3A20 until required actions are completed.
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Compliance Time
within one year after the effective date of this Airworthiness Directive
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Affected Aircraft
BEECHCRAFT Models 65-90, 65-A90, 65-B90 (Serial Numbers LJ-1 through LJ-406) and 65-A90-1 (Serial Numbers LM-1 through LM-129)
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Federal Register Abstract
Ice Damage to Engine
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_68-21-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 68-21-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BEECHCRAFT Models 65-90, 65-A90, 65-B90 and 65-A90-1 Aircraft Subject: Ice Damage to Engine Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/17/1968 Make: Textron Aviation Inc. Model: 65-90 | 65-A90 | 65-A90-1 | B90 Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 68-21-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-668 AD NUMBER: 68-21-04 SUBJECT HEADING: Airworthiness Directives; BEECHCRAFT Models 65-90, 65-A90, 65-B90 and 65-A90-1 Aircraft ACTION: SUMMARY: DATES: Effective October 17, 1968. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 68-21-04 BEECHCRAFT: Amendment 39-668. Applies to Models 65-90, 65-A90 and 65-B90 aircraft (Serial Numbers LJ-1 through LJ-406) and 65-A90-1 aircraft (Serial Numbers LM-1 through LM-129). Compliance required as indicated. To reduce the possibility of engine damage and malfunction while operating in icing conditions above 15,000 feet MSL, within one year after the effective date of this Airworthiness Directive, unless already accomplished, accomplish the following: (A) Install seal strips and a spring lockdown assembly on the Inertial Separator Vane and an automatic ignition (re-light) system in accordance with the method outlined in Beechcraft Service Instructions #0115-010 dated October 1, 1968. (B) Equip the airplane with the applicable FAA Flight Manual as set forth in Beechcraft Service Instructions #0115-010 dated October 1, 1968. (C) The Emergency Order Amending Type Certificate No. 3A20 dated May 24, 1968, as amended September 19, 1968, shall remain in force and effect as to each individual aircraft covered by this Airworthiness Directive until paragraphs (A) and (B) have been accomplished. This amendment becomes effective October 17, 1968. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_68-21-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 68-21-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BEECHCRAFT Models 65-90, 65-A90, 65-B90 and 65-A90-1 Aircraft Subject: Ice Damage to Engine Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/17/1968 Make: Textron Aviation Inc. Model: 65-90 | 65-A90 | 65-A90-1 | B90 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: 68-21-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-668 AD NUMBER: 68-21-04 SUBJECT HEADING: Airworthiness Directives; BEECHCRAFT Models 65-90, 65-A90, 65-B90 and 65-A90-1 Aircraft ACTION: SUMMARY: DATES: Effective October 17, 1968. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 68-21-04 BEECHCRAFT: Amendment 39-668. Applies to Models 65-90, 65-A90 and 65-B90 aircraft (Serial Numbers LJ-1 through LJ-406) and 65-A90-1 aircraft (Serial Numbers LM-1 through LM-129). Compliance required as indicated. To reduce the possibility of engine damage and malfunction while operating in icing conditions above 15,000 feet MSL, within one year after the effective date of this Airworthiness Directive, unless already accomplished, accomplish the following: (A) Install seal strips and a spring lockdown assembly on the Inertial Separator Vane and an automatic ignition (re-light) system in accordance with the method outlined in Beechcraft Service Instructions #0115-010 dated October 1, 1968. (B) Equip the airplane with the applicable FAA Flight Manual as set forth in Beechcraft Service Instructions #0115-010 dated October 1, 1968. (C) The Emergency Order Amending Type Certificate No. 3A20 dated May 24, 1968, as amended September 19, 1968, shall remain in force and effect as to each individual aircraft covered by this Airworthiness Directive until paragraphs (A) and (B) have been accomplished. This amendment becomes effective October 17, 1968. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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