AD 69-16-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Corporation | 250-C18 | ALLISON Model 250-C18 Engines |
Unsafe Condition
The lower gear box and oil outlet magnetic plugs may exhibit metal particles indicating incipient engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the lower gear box and oil outlet magnetic plugs daily at intervals not exceeding five hours' time in service. Install a visual magnetic plug indicator by November 3, 1969, as per Bell Service Letter 206A-129 or equivalent. After installing the indicator, the daily inspections are no longer required.
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Compliance Time
Effective immediately upon receipt of this AD for inspections; install the indicator on or before November 3, 1969.
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Affected Aircraft
Rolls-Royce Corporation Model 250-C18 engines installed in Bell Model 206A Helicopters.
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Federal Register Abstract
Lower Gear Box and Oil Outlet Magnetic Plugs
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_69-16-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 69-16-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: ALLISON Model 250-C18 Engines Subject: Lower Gear Box and Oil Outlet Magnetic Plugs Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/30/1969 Make: Rolls-Royce Corporation Model: 250-C18 Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 69-16-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-829 AD NUMBER: 69-16-05 SUBJECT HEADING: ALLISON Model 250-C18 Engines ACTION: SUMMARY: DATES: Effective August 30, 1969. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 69-16-05 ALLISON: Amdt. 39-829. Applies to Model 250-C18 engines installed in Bell Model 206A Helicopters. Compliance: Required as indicated. To detect incipient engine failure, accomplish the following: A) Effective immediately upon receipt of this Airworthiness Directive, inspect the lower gear box and the oil outlet magnetic plugs on a daily basis as described in Allison Commercial Service Letter 250 CSL No. 6, dated January 12, 1967. This inspection shall be performed at time intervals not to exceed five (5) hours' time in service. B) On or before November 3, 1969, install a visual magnetic plug indicator as described in Bell Service Letter 206A-129, dated August 11, 1969, or later FAA approved revision or an equivalent installation approved by Chief, Engineering & Manufacturing Branch, FAA, Central Region. C) When the installation described in Paragraph B of this Airworthiness Directive has been accomplished, the inspections required by Paragraph A of this Airworthiness Directive will no longer be required. Effective August 13, 1969, revised August 30, 1969. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_69-16-05.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 69-16-05 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: ALLISON Model 250-C18 Engines Subject: Lower Gear Box and Oil Outlet Magnetic Plugs Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/30/1969 Make: Rolls-Royce Corporation Model: 250-C18 Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 69-16-05 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-829 AD NUMBER: 69-16-05 SUBJECT HEADING: ALLISON Model 250-C18 Engines ACTION: SUMMARY: DATES: Effective August 30, 1969. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 69-16-05 ALLISON: Amdt. 39-829. Applies to Model 250-C18 engines installed in Bell Model 206A Helicopters. Compliance: Required as indicated. To detect incipient engine failure, accomplish the following: A) Effective immediately upon receipt of this Airworthiness Directive, inspect the lower gear box and the oil outlet magnetic plugs on a daily basis as described in Allison Commercial Service Letter 250 CSL No. 6, dated January 12, 1967. This inspection shall be performed at time intervals not to exceed five (5) hours' time in service. B) On or before November 3, 1969, install a visual magnetic plug indicator as described in Bell Service Letter 206A-129, dated August 11, 1969, or later FAA approved revision or an equivalent installation approved by Chief, Engineering & Manufacturing Branch, FAA, Central Region. C) When the installation described in Paragraph B of this Airworthiness Directive has been accomplished, the inspections required by Paragraph A of this Airworthiness Directive will no longer be required. Effective August 13, 1969, revised August 30, 1969. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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