AD 72-07-01
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aero Resources Inc. | J-2 Gyroplane | Airworthiness Directives; McCulloch Aircraft Corp. Model J-2 Aircraft |
Unsafe Condition
The angle between the rotor mast and pitch bearing case may be outside the 3.9 to 5.0 degree tolerance, and loose rivets on the collective stick assembly (part number 27133) at the juncture with collective stick shaft (part number 27104) may cause failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the rotor mast and pitch bearing case angle using a propeller protractor and rerig if outside 3.9-5.0 degrees. Inspect collective stick for loose rivets; replace assembly if found or reinspect every 25 flight hours if no rivets found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
McCulloch Aircraft Corp. Model J-2 Gyroplane, serial numbers 10 and subsequent (for rotor angle requirement) and serial numbers 10 through 54 (for collective stick inspection)
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Rotor Clearance and Collective Stick
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_72-07-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 72-07-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; McCulloch Aircraft Corp. Model J-2 Aircraft Subject: Rotor Clearance and Collective Stick Status: Current Citation: This information is not available. Citation Publish Date: 03/22/1972 Effective Date: 03/22/1972 Make: Aero Resources Inc. Model: J-2 Gyroplane Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 72-07-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1410 AD NUMBER: 72-07-01 SUBJECT HEADING: Airworthiness Directives; McCulloch Aircraft Corp. Model J-2 Aircraft ACTION: SUMMARY: DATES: Effective March 22, 1972 ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 72-07-01 McCULLOCH AIRCRAFT CORP.: Amendment 39-1410. Applies to Model J-2 Gyroplane, compliance, as indicated, required before further flight unless already accomplished. 1. For serial numbers 10 and subsequent: By means of a propeller protractor, determine that the angle between the rotor mast and pitch bearing case is not less than 3.9 and not greater 5.0 degrees. If the angle measured is not within the tolerance indicated, rerig per paragraph 4.4 of McCulloch Aircraft Corporation Service Bulletin 8C dated February 24, 1972 or later FAA-approved revisions. 2. For serial numbers 10 through 54: (A) Inspect collective stick, part number 27133, for loose rivets at the juncture with collective stick shaft, part number 27104. (B) If loose rivets are found, replace the collective stick assembly with the new collective stick assembly per paragraph 4.1 "Rework-Effectivity (A)" of McCulloch Aircraft Corporation Service Bulletin 8C or with an equivalent approved by Chief, Aircraft Engineering Division, FAA Western Region. (C) If no loose rivets are found and until the rework per paragraph 4.1 of McCulloch Aircraft Corporation Service Bulletin 8C is accomplished, reinspect for loose rivets at intervals not to exceed twenty-five (25) hours of flight time. This amendment is effective March 22, 1972 for all persons except those to whom it was made effective by airmail letter dated March 3, 1972, which contained this amendment. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_72-07-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 72-07-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; McCulloch Aircraft Corp. Model J-2 Aircraft Subject: Rotor Clearance and Collective Stick Status: Current Citation: This information is not available. Citation Publish Date: 03/22/1972 Effective Date: 03/22/1972 Make: Aero Resources Inc. Model: J-2 Gyroplane Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: AIR-700: Compliance & Airworthiness Division Office of Primary Responsibility: AIR-720: Operational Safety Branch CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 72-07-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1410 AD NUMBER: 72-07-01 SUBJECT HEADING: Airworthiness Directives; McCulloch Aircraft Corp. Model J-2 Aircraft ACTION: SUMMARY: DATES: Effective March 22, 1972 ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 72-07-01 McCULLOCH AIRCRAFT CORP.: Amendment 39-1410. Applies to Model J-2 Gyroplane, compliance, as indicated, required before further flight unless already accomplished. 1. For serial numbers 10 and subsequent: By means of a propeller protractor, determine that the angle between the rotor mast and pitch bearing case is not less than 3.9 and not greater 5.0 degrees. If the angle measured is not within the tolerance indicated, rerig per paragraph 4.4 of McCulloch Aircraft Corporation Service Bulletin 8C dated February 24, 1972 or later FAA-approved revisions. 2. For serial numbers 10 through 54: (A) Inspect collective stick, part number 27133, for loose rivets at the juncture with collective stick shaft, part number 27104. (B) If loose rivets are found, replace the collective stick assembly with the new collective stick assembly per paragraph 4.1 "Rework-Effectivity (A)" of McCulloch Aircraft Corporation Service Bulletin 8C or with an equivalent approved by Chief, Aircraft Engineering Division, FAA Western Region. (C) If no loose rivets are found and until the rework per paragraph 4.1 of McCulloch Aircraft Corporation Service Bulletin 8C is accomplished, reinspect for loose rivets at intervals not to exceed twenty-five (25) hours of flight time. This amendment is effective March 22, 1972 for all persons except those to whom it was made effective by airmail letter dated March 3, 1972, which contained this amendment. 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.