AD 66-01-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Allied Ag Cat Productions, Inc. | G-164 | Airworthiness Directives; Grumman Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164A | Airworthiness Directives; Grumman Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B | Airworthiness Directives; Grumman Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B-15T | Airworthiness Directives; Grumman Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B-20T | Airworthiness Directives; Grumman Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B-34T | Airworthiness Directives; Grumman Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164B (with 73 inch wing gap) | Airworthiness Directives; Grumman Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164C | Airworthiness Directives; Grumman Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164D | Airworthiness Directives; Grumman Model G-164 Series Airplanes |
| aircraft | Allied Ag Cat Productions, Inc. | G-164D (with 73 inch wing gap) | Airworthiness Directives; Grumman Model G-164 Series Airplanes |
Unsafe Condition
Loose propeller hubs due to unmatched propeller cone and spacer sets or improper propeller nut seating on crankshaft threads.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove propeller and check for matched cone and spacer sets; ensure AN 5008-20 cone with AN 5010-20 spacer (1.969 inch total) or No. 525-B cone with No. 30091 spacer (1.980 inch total). Verify propeller nut allows at least one full turn less when installed versus removed. Install Grumman spacer P/N A1600-99 if needed on Gulf Coast W-670-240 engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 25 hours' time in service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Grumman Model G-164 Series Airplanes equipped with J-5404/MA96K, SR-5404R/MA96K or SR-5404/MA96K propellers on Continental W-670 (R-670) Series, Gulf Coast W-670-240, and Jacobs R-755 and L-4M Series engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Propeller Cone and Spacer Sets
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_66-01-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-01-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Grumman Model G-164 Series Airplanes Subject: Propeller Cone and Spacer Sets Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/28/1965 Make: Allied Ag Cat Productions, Inc. Model: G-164 | G-164A | G-164B | G-164B-15T | G-164B-20T | G-164B-34T | G-164B (with 73 inch wing gap) | G-...Show more 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: 66-01-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-174 AD NUMBER: 66-01-02 SUBJECT HEADING: Airworthiness Directives; Grumman Model G-164 Series Airplanes ACTION: SUMMARY: DATES: Effective December 28, 1965. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-01-02 GRUMMAN: Amdt. 39-174 Part 39 Federal Register December 28, 1965. Applies to Model G-164 Series Airplanes Equipped with J-5404/MA96K, SR-5404R/MA96K or SR-5404/MA96K Propellers on Continental W-670 (R-670) Series, Gulf Coast W-670-240, and Jacobs R-755 and L-4M Series Engines. Compliance required within 25 hours' time in service after the effective date of this AD, unless already accomplished. To prevent further instances of loose propeller hubs, accomplish the following: (a) Remove propeller and check for matched sets of cone and spacer. The AN 5008- 20 rear cone (0.969 inch) must be used with the AN 5010-20 spacer (1.00 inch) and a No. 525-B rear cone (0.875 inch) must be mated with a No. 30091 spacer (1.105 inch). The overall average length of these sets must be 1.969 inch and l.980 inch respectively. An exception to these requirements is the Gulf Coast W-670-240 engine modified after 3/10/64 wherein the spacer has been omitted from the propeller installation due to the 1-inch shorter propeller shaft. (b) Determine that the propeller nut does not bottom on the crankshaft threads by comparing the number of total turns with propeller removed to the number of turns with propeller installed and properly torqued. To correctly seat the propeller hub on the crankshaft there should be at least one full turn less with the propeller installed. If a proper fit cannot be obtained, new matched sets must be installed. If this procedure indicates the need for a spacer on the Gulf Coast W-670-240 installation, install Grumman spacer P/N A1600-99 (1/8 inch long). (Grumman Service Bulletin No. 32 dated September 9, 1965, and Service Bulletin No. 32A dated October 21, 1965, cover this same subject.) This directive effective December 28, 1965. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_66-01-02.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 66-01-02 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Grumman Model G-164 Series Airplanes Subject: Propeller Cone and Spacer Sets Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/28/1965 Make: Allied Ag Cat Productions, Inc. Model: G-164 | G-164A | G-164B | G-164B-15T | G-164B-20T | G-164B-34T | G-164B (with 73 inch wing gap) | G-...Show more 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: 66-01-02 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-174 AD NUMBER: 66-01-02 SUBJECT HEADING: Airworthiness Directives; Grumman Model G-164 Series Airplanes ACTION: SUMMARY: DATES: Effective December 28, 1965. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 66-01-02 GRUMMAN: Amdt. 39-174 Part 39 Federal Register December 28, 1965. Applies to Model G-164 Series Airplanes Equipped with J-5404/MA96K, SR-5404R/MA96K or SR-5404/MA96K Propellers on Continental W-670 (R-670) Series, Gulf Coast W-670-240, and Jacobs R-755 and L-4M Series Engines. Compliance required within 25 hours' time in service after the effective date of this AD, unless already accomplished. To prevent further instances of loose propeller hubs, accomplish the following: (a) Remove propeller and check for matched sets of cone and spacer. The AN 5008- 20 rear cone (0.969 inch) must be used with the AN 5010-20 spacer (1.00 inch) and a No. 525-B rear cone (0.875 inch) must be mated with a No. 30091 spacer (1.105 inch). The overall average length of these sets must be 1.969 inch and l.980 inch respectively. An exception to these requirements is the Gulf Coast W-670-240 engine modified after 3/10/64 wherein the spacer has been omitted from the propeller installation due to the 1-inch shorter propeller shaft. (b) Determine that the propeller nut does not bottom on the crankshaft threads by comparing the number of total turns with propeller removed to the number of turns with propeller installed and properly torqued. To correctly seat the propeller hub on the crankshaft there should be at least one full turn less with the propeller installed. If a proper fit cannot be obtained, new matched sets must be installed. If this procedure indicates the need for a spacer on the Gulf Coast W-670-240 installation, install Grumman spacer P/N A1600-99 (1/8 inch long). (Grumman Service Bulletin No. 32 dated September 9, 1965, and Service Bulletin No. 32A dated October 21, 1965, cover this same subject.) This directive effective December 28, 1965. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.
Related Airworthiness Directives
89-18-02 R1
final ruleAirworthiness Directives; SCHWEIZER (GRUMMAN) All Model G-164 Series Airplanes
Unsafe Condition: Failure of the forward and aft elevator control system push-pull rods and end fittings due to corrosion and cracks.
82-13-06
final ruleAirworthiness Directives; SCHWEIZER (GULFSTREAM AMERICAN-GRUMMAN) Models G-164B, G-164C, and G164D Airplanes
Unsafe Condition: Elongation of the aileron cable attach holes and dislodgement of P/N A1450-281 bushings from the aileron bellcrank.
73-19-10
final ruleAirworthiness Directives; Grumman Models G-164A and G-164B
Unsafe Condition: Looseness, wear, or corrosion of the bolts attaching the Elevator Control Horn, P/N A 1841-3, to the left and right side elevators, P/N A1201-5A and A1201-4A, could result in loss of elevator control.
78-23-11
final ruleAirworthiness Directives; GRUMMAN G-164 S/N's 1 thru 400, G-164A S/N's 401 and up, G-164B S/N's 01B and up, G-164C S/N's 01C and up, certificated in all categories.
Unsafe Condition: Aileron balance cables (P/N A1860-101 and A1860-401) may contain broken wires at the wing root pulley, which could result in loss of aileron control.