AD 70-16-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | TPE331-3W | AIRESEARCH Model TPE331-3W-301A Engines |
Unsafe Condition
Backing off of the high speed pinion retaining nut may cause engine failures.
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Required Actions
Replace the high speed pinion assembly P/N 869441-2 in accordance with AiResearch telegraphic service bulletin No. 622 dated July 24, 1970, or later FAA approved revision prior to further use.
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Compliance Time
prior to further use
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Affected Aircraft
AIRESEARCH Model TPE331-3W-301A engines, serial numbers P01001 through P-01010 and P-01012, P-01014, and P-01015, installed in but not limited to Handley-Page Model C10A aircraft.
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Federal Register Abstract
High Speed Pinion Assembly
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_70-16-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-16-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: AIRESEARCH Model TPE331-3W-301A Engines Subject: High Speed Pinion Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Honeywell International Inc. Model: TPE331-3W Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 70-16-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1064 AD NUMBER: 70-16-09 SUBJECT HEADING: AIRESEARCH Model TPE331-3W-301A Engines ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-16-09 AIRESEARCH: Amdt. 39-1064. Applies to Model TPE331-3W-301A engines, S/N P01001 through P-01010 and P-01012, P-01014, and P-01015, installed in but not limited to Handley-Page Model C10A aircraft. This directive necessary because of a serious condition which may be caused by backing off of the high speed pinion retaining nut. To prevent engine failures from this cause, the following is required: Replace the high speed pinion assembly P/N 869441-2 in accordance with AiResearch telegraphic service bulletin No. 622, dated July 24, 1970, or later FAA approved revision, prior to further use. This amendment is effective upon publication in the Federal Register for all persons except those to whom it was made effective immediately by telegram dated July 24, 1970. FOOTER:
Document Text
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AD Final Rules - DRS_70-16-09.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 70-16-09 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: AIRESEARCH Model TPE331-3W-301A Engines Subject: High Speed Pinion Assembly Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Honeywell International Inc. Model: TPE331-3W 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: 70-16-09 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1064 AD NUMBER: 70-16-09 SUBJECT HEADING: AIRESEARCH Model TPE331-3W-301A Engines ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 70-16-09 AIRESEARCH: Amdt. 39-1064. Applies to Model TPE331-3W-301A engines, S/N P01001 through P-01010 and P-01012, P-01014, and P-01015, installed in but not limited to Handley-Page Model C10A aircraft. This directive necessary because of a serious condition which may be caused by backing off of the high speed pinion retaining nut. To prevent engine failures from this cause, the following is required: Replace the high speed pinion assembly P/N 869441-2 in accordance with AiResearch telegraphic service bulletin No. 622, dated July 24, 1970, or later FAA approved revision, prior to further use. This amendment is effective upon publication in the Federal Register for all persons except those to whom it was made effective immediately by telegram dated July 24, 1970. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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