AD 54-01-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hamilton Standard Division | 232 | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| aircraft | Hamilton Standard Division | 242 | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| aircraft | Hamilton Standard Division | 34D | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| aircraft | Hamilton Standard Division | 34E | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| aircraft | Hamilton Standard Division | 43D | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| aircraft | Hamilton Standard Division | 43E | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| propeller | Hamilton Standard Division | 232 | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| propeller | Hamilton Standard Division | 242 | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| propeller | Hamilton Standard Division | 34D | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| propeller | Hamilton Standard Division | 34E | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| propeller | Hamilton Standard Division | 43D | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
| propeller | Hamilton Standard Division | 43E | HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers |
Unsafe Condition
Unwanted reversal of Hamilton Standard propellers could occur due to broken plunger spring, oil film between armature and valve body, or foreign particle lodged between valve and seat in Model 67000 reverse solenoid valves.
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Required Actions
Do not use Hamilton Standard Model 67000 reverse solenoid valves on civil aircraft subsequent to December 31, 1954.
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Compliance Time
Compliance required as indicated.
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Affected Aircraft
Hamilton Standard Models 43D, 43E, 34D, 34E, 232, and 242 propellers.
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Federal Register Abstract
Solenoid Valves
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_54-01-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 54-01-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers Subject: Solenoid Valves Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Hamilton Standard Division Model: 232 | 242 | 34D | 34E | 43D | 43E Product Type: Propeller 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: 54-01-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 54-01-01 SUBJECT HEADING: HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 54-01-01 HAMILTON STANDARD: Applies to All Hamilton Standard Reversing Propellers Models 43D, 43E, 34D, 34E, 232 and 242. Compliance required as indicated. Subsequent to December 31, 1954, Hamilton Standard Model 67000 reverse solenoid valves shall not be used on civil aircraft. Analysis has shown that unwanted reversal of Hamilton Standard propellers could possibly occur with use of the Hamilton Standard Model 67000 reverse solenoid valve if any of the following malfunctions of the valve were experienced: 1. A broken plunger spring. This could cause the valve to open fully. 2. A film of oil between the armature and the valve body. This could cause the valve to remain fully open. 3. A foreign particle lodged between the valve and its seat. This could cause a pressure buildup in the reverse oil passage. Although there is no record of such malfunctions of this valve on civil aircraft, the potential hazards that exist indicate the desirability of precluding future use of this obsolete component. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_54-01-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 54-01-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers Subject: Solenoid Valves Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: Hamilton Standard Division Model: 232 | 242 | 34D | 34E | 43D | 43E Product Type: Propeller 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: 54-01-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 54-01-01 SUBJECT HEADING: HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 54-01-01 HAMILTON STANDARD: Applies to All Hamilton Standard Reversing Propellers Models 43D, 43E, 34D, 34E, 232 and 242. Compliance required as indicated. Subsequent to December 31, 1954, Hamilton Standard Model 67000 reverse solenoid valves shall not be used on civil aircraft. Analysis has shown that unwanted reversal of Hamilton Standard propellers could possibly occur with use of the Hamilton Standard Model 67000 reverse solenoid valve if any of the following malfunctions of the valve were experienced: 1. A broken plunger spring. This could cause the valve to open fully. 2. A film of oil between the armature and the valve body. This could cause the valve to remain fully open. 3. A foreign particle lodged between the valve and its seat. This could cause a pressure buildup in the reverse oil passage. Although there is no record of such malfunctions of this valve on civil aircraft, the potential hazards that exist indicate the desirability of precluding future use of this obsolete component. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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