AD 76-18-03
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Dowty Propellers | (c) R184/4-30-4/ | DOWTY ROTOL Models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 Propellers |
| aircraft | Dowty Propellers | (c) R193/4-30-4/ | DOWTY ROTOL Models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 Propellers |
| aircraft | Dowty Propellers | (c) R257/4-30-4/ | DOWTY ROTOL Models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 Propellers |
| propeller | Dowty Propellers | (c) R184/4-30-4/ | DOWTY ROTOL Models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 Propellers |
| propeller | Dowty Propellers | (c) R193/4-30-4/ | DOWTY ROTOL Models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 Propellers |
| propeller | Dowty Propellers | (c) R257/4-30-4/ | DOWTY ROTOL Models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 Propellers |
Unsafe Condition
Cracking and possible failure of the hub driving center due to improper machining.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Re-work the hub driving center to salvage scheme No. 640144000 for listed serial numbers. Inspect and rework if incorrectly machined for unlisted serial numbers, following Service Bulletin 61-858 or approved equivalent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next propeller overhaul or within the next 4700 hours propeller time in service after the effective date of this AD, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Dowty Propellers models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 with Hub Driving Centers P/N 601026638 modified to Mod. No. (c)VP2486.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Hub and Driving Center Assemblies
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_76-18-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-18-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DOWTY ROTOL Models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 Propellers Subject: Hub and Driving Center Assemblies Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/01/1976 Make: Dowty Propellers Model: (c) R184/4-30-4/ | (c) R193/4-30-4/ | (c) R257/4-30-4/ 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: 76-18-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2711 AD NUMBER: 76-18-03 SUBJECT HEADING: DOWTY ROTOL Models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 Propellers ACTION: SUMMARY: DATES: Effective October 1, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-18-03 DOWTY ROTOL: Amendment 39-2711. Applies to Dowty Rotol Type (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 propellers having Hub Driving Centers, P/N 601026638, modified to Dowty Rotol Mod. No. (c)VP2486. These propellers are installed on, but not necessarily limited to, Fokker Model F-27, Fairchild Model FH-227, and Grumman Model G-159 Series airplanes. NOTE: Dowty Rotol Mod. No. (c)VP2486 is covered in Dowty Rotol Service Bulletin 61-573A, dated June 1968, and the incorporation of the modification is required by AD 68-20-7. Compliance is required at the next propeller overhaul or within the next 4700 hours propeller time in service after the effective date of this AD, whichever occurs first, unless already accomplished. To prevent cracking and possible failure of the hub driving center due to improper machining, accomplish the following: (a) For propellers that incorporate hub and driving center assemblies having the following serial numbers, rework the hub driving center to salvage scheme No. 640144000, in accordance with Dowty Rotol Service Bulletin 61-858, dated February 4, 1975, or an equivalent approved in accordance with paragraph (c) of this AD: Hub and Driving Center Assembly Serial Numbers Serial No. Propeller Type Serial No. Propeller Type 184/59/47 R184/4-30-4/50 DRG/31/62 R184/4-30-4/50 184/59/60 " DRG/288/64 " 184/59/62 " DRG/290/64 " 184/59/64 " DRG/56/65 " 184/59/65 " DRG/116/65 " 184/60/79 " DRG/122/65 " 184/60/86 " DRG/223/65 " 184/60/89 " DRG/223/65 " 184/60/94 " DRG/224/65 " 184/60/95 " DRG/42/66 " 184/60/96 " DRG/122/66 " 184/60/99 " 193/58/11 R193/4-30-4/50 184/60/103 " 193/58/17 " 184/60/126 " 193/58/27 " 184/60/146 " 193/58/38 " 184/60/147 " 193/59/116 " 184/60/159 " 193/59/119 " 184/60/160 " 193/60/150 " DRG/10/61 " 193/60/151 " DRG/12/61 " DRG/32/62 " DRG/14/61 " DRG/119/66 " DRG/17/61 " DRG/442/66 " DRG/20/61 " DRG/131/66 R257/4-30-4/60 DRG/24/61 " DRG/407/66 " DRG/25/61 " DRG/408/66 " DRG/31/61 " DRG/454/66 " DRG/38/61 " DRG/28/67 " DRG/41/61 " DRG/30/67 " DRG/43/61 " DRG/86/67 " DRG/44/61 " DRG/93/67 " DRG/48/61 " DRG/95/67 " DRG/49/61 " DRG/189/67 " DRG/58/61 " DRG/194/67 " DRG/2/62 " DRG/231/67 " DRG/9/62 " DRG/233/67 " DRG/10/62 " DRG/344/67 " DRG/11/62 " DRG/345/67 " DRG/19/62 " DRG/348/67 " (b) For propellers that incorporate hub and driving center assemblies having serial numbers not listed in paragraph (a) of this AD, accomplish the following in accordance with Dowty Rotol Service Bulletin 61-858, dated February 4, 1975, or an equivalent approved in accordance with paragraph (c) of this AD: (1) Inspect the hub driving center to verify correct machining. (2) If the hub driving center is found to be incorrectly machined, rework the hub driving center to salvage scheme No. 640144000. (c) The equivalent means of compliance specified in paragraphs (a) and (b) of this AD must be approved by the Chief, Aircraft Certification Staff, FAA Europe, Africa and Middle East Region, c/o American Embassy, APO New York, N.Y. 09667. This amendment becomes effective on October 1, 1976. FOOTER:
Document Text
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AD Final Rules - DRS_76-18-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-18-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: DOWTY ROTOL Models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 Propellers Subject: Hub and Driving Center Assemblies Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 10/01/1976 Make: Dowty Propellers Model: (c) R184/4-30-4/ | (c) R193/4-30-4/ | (c) R257/4-30-4/ 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: 76-18-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2711 AD NUMBER: 76-18-03 SUBJECT HEADING: DOWTY ROTOL Models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 Propellers ACTION: SUMMARY: DATES: Effective October 1, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-18-03 DOWTY ROTOL: Amendment 39-2711. Applies to Dowty Rotol Type (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 propellers having Hub Driving Centers, P/N 601026638, modified to Dowty Rotol Mod. No. (c)VP2486. These propellers are installed on, but not necessarily limited to, Fokker Model F-27, Fairchild Model FH-227, and Grumman Model G-159 Series airplanes. NOTE: Dowty Rotol Mod. No. (c)VP2486 is covered in Dowty Rotol Service Bulletin 61-573A, dated June 1968, and the incorporation of the modification is required by AD 68-20-7. Compliance is required at the next propeller overhaul or within the next 4700 hours propeller time in service after the effective date of this AD, whichever occurs first, unless already accomplished. To prevent cracking and possible failure of the hub driving center due to improper machining, accomplish the following: (a) For propellers that incorporate hub and driving center assemblies having the following serial numbers, rework the hub driving center to salvage scheme No. 640144000, in accordance with Dowty Rotol Service Bulletin 61-858, dated February 4, 1975, or an equivalent approved in accordance with paragraph (c) of this AD: Hub and Driving Center Assembly Serial Numbers Serial No. Propeller Type Serial No. Propeller Type 184/59/47 R184/4-30-4/50 DRG/31/62 R184/4-30-4/50 184/59/60 " DRG/288/64 " 184/59/62 " DRG/290/64 " 184/59/64 " DRG/56/65 " 184/59/65 " DRG/116/65 " 184/60/79 " DRG/122/65 " 184/60/86 " DRG/223/65 " 184/60/89 " DRG/223/65 " 184/60/94 " DRG/224/65 " 184/60/95 " DRG/42/66 " 184/60/96 " DRG/122/66 " 184/60/99 " 193/58/11 R193/4-30-4/50 184/60/103 " 193/58/17 " 184/60/126 " 193/58/27 " 184/60/146 " 193/58/38 " 184/60/147 " 193/59/116 " 184/60/159 " 193/59/119 " 184/60/160 " 193/60/150 " DRG/10/61 " 193/60/151 " DRG/12/61 " DRG/32/62 " DRG/14/61 " DRG/119/66 " DRG/17/61 " DRG/442/66 " DRG/20/61 " DRG/131/66 R257/4-30-4/60 DRG/24/61 " DRG/407/66 " DRG/25/61 " DRG/408/66 " DRG/31/61 " DRG/454/66 " DRG/38/61 " DRG/28/67 " DRG/41/61 " DRG/30/67 " DRG/43/61 " DRG/86/67 " DRG/44/61 " DRG/93/67 " DRG/48/61 " DRG/95/67 " DRG/49/61 " DRG/189/67 " DRG/58/61 " DRG/194/67 " DRG/2/62 " DRG/231/67 " DRG/9/62 " DRG/233/67 " DRG/10/62 " DRG/344/67 " DRG/11/62 " DRG/345/67 " DRG/19/62 " DRG/348/67 " (b) For propellers that incorporate hub and driving center assemblies having serial numbers not listed in paragraph (a) of this AD, accomplish the following in accordance with Dowty Rotol Service Bulletin 61-858, dated February 4, 1975, or an equivalent approved in accordance with paragraph (c) of this AD: (1) Inspect the hub driving center to verify correct machining. (2) If the hub driving center is found to be incorrectly machined, rework the hub driving center to salvage scheme No. 640144000. (c) The equivalent means of compliance specified in paragraphs (a) and (b) of this AD must be approved by the Chief, Aircraft Certification Staff, FAA Europe, Africa and Middle East Region, c/o American Embassy, APO New York, N.Y. 09667. This amendment becomes effective on October 1, 1976. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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Related Airworthiness Directives
2010-10-23
final ruleAirworthiness Directives; Dowty Propellers R175/4-30-4/13; R175/4-30-4/13e; R184/4-30-4/50; R193/4-30-4/50; R193/4-30-4/61; R193/4-30-4/64; R193/4-30-4/65; R193/4-30-4/66; R.209/4-40-4.5/2; R212/4-30-4/22; R.245/4-40-4.5/13; R257/4-30-4/60; and R.259/4-40-4.5/17 Model Propellers
Unsafe Condition: could result in reduced controllability of the airplane.
81-16-02
final ruleDOWTY ROTOL, LTD. Propeller Types
Unsafe Condition: Cracks in the propeller pitch lock cylinder
72-14-01
final ruleDOWTY ROTOL, LTD Models (c)R130/4-20-4/12E, (c)R186/4-30-4/16, (c)R187/4-30-4/18, (c)R193/4-30-4/50, (c)R184/4-30-4/50, (c)R259/4-40-4.5/17, (c)R148/4-20-4/21E, (c)R175/4-30-4/13E, (c)R179/4- 20-4/33, (c)R257/4-30-4/60, (c)R245/4-40-4.5/13, and (c)R209/4-40-4.5/2 Propellers
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72-07-07
final ruleDOWTY ROTOL applies to all propellers with blade root sizes Nos. 20 and 30
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