{"id":"F2005L01760","name":"AD/BELL 222/28 - Rotating Ring - Drive Pin Hole","slug":"ad-bell-222-28-rotating-ring-drive-pin-hole","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":35856,"registerId":"commonwealth-F2005L01760-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell Helicopter Textron Canada (BHTC) 22","sectionType":"division","heading":"Bell Helicopter Textron Canada (BHTC) 222 Series Helicopters","content":"### Bell Helicopter Textron Canada (BHTC) 222 Series Helicopters\n\n| AD/BELL 222/28 | Rotating Ring - Drive Pin Hole | 8/2005 |\n| -------------- | ------------------------------ | ------ |\n\n```html\n

Applicability:

1. The following Bell Helicopter Textron Canada (BHTC) Model 222, 222B, 222U and 230 helicopters having rotating ring assemblies P/N 222-010-403-005, -113 and -117 equipped with drive pins P/N 230-010-402-101 or -103:

(a) Model 222 S/N 47008 through 47089,

(b) Model 222B S/N 47131 through 47156,

(c) Model 222U S/N 47501 through 47574, and

(d) Model 230 S/N 23001 through 23038.

2. Spare rotating ring assemblies P/N 222-010-403-005, -113 and -117 equipped with drive pins P/N 230-010-402-101 or -103.

Note 1: Rotating ring assemblies P/N 222-010-403-117 identified with serial number “TI XXX” are not affected.

Requirement:

Inspect the radius at the inboard surface of the rotating ring drive pin hole, in accordance with the following applicable alert service bulletin dated 18 May 2001 or later revision approved by the Director, Aircraft Certification, Transport Canada. The radius should be 0.060 to 0.090 inch. If the radius is not within limits, the rotating ring assembly, including the drive pins, must be removed and scrapped.

Helicopter Model

Alert Service Bulletin

222 and 222B

222-01-90

222U

222U-01-61

230

230-01-23

Note 2: Transport Canada AD: CF-2001-29 refers.

Compliance:

Before next flight after the effective date.

This Airworthiness Directive becomes effective on 4 August 2005.

\n```\n\n| Background: | There were reports of interference between the new pin P/N 230-010-402-101 and the rotating ring drive pin bore. The radius at the inboard surface of the rotating ring drive pin hole may be inadequate. BHTC has issued a series of alert service bulletins to provide instructions to inspect the drive pin to rotating ring joint. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n18 June 2005","sortOrder":0},{"sectionNumber":"AD/BELL 222/28","sectionType":"part","heading":"AD/BELL 222/28","content":"## AD/BELL 222/28","sortOrder":1},{"sectionNumber":"Rotating Ring - Drive Pin Hole","sectionType":"part","heading":"Rotating Ring - Drive Pin Hole","content":"## Rotating Ring - Drive Pin Hole","sortOrder":2},{"sectionNumber":"8/2005","sectionType":"part","heading":"8/2005","content":"## 8/2005","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD targets a specific technical issue reported (interference of a new drive pin with the rotating ring bore) and confines action to identified models, serial ranges and part numbers. It does not expand to other components or broader fleet categories; it prescribes inspection and removal/scrap only for non‑conforming assemblies."},"complexity_factors":["Narrow applicability by helicopter model, serial number ranges and specific part numbers (limits universality)","Single measurable technical requirement (radius must be 0.060–0.090 inch) — requires metrology capability","Immediate compliance timing: \"before next flight\" increases operational urgency and potential costs","Mandatory scrap of non‑conforming rotating ring assemblies and drive pins (replacement cost and logistics)","Reliance on manufacturer alert service bulletins dated 18 May 2001 or later approved by the Director, Aircraft Certification, Transport Canada (regulatory/administrative dependency)","Exclusion for rotating rings identified with serial “TI XXX” (exception handling)","Includes spare parts in applicability (maintenance stock impact)","Cross‑reference to Transport Canada AD CF‑2001‑29 (international regulatory linkage)"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specified Bell 222, 222B, 222U and 230 helicopters (and specified spare rotating ring assemblies) fitted with listed rotating-ring and drive‑pin part numbers to inspect the inboard radius of the rotating‑ring drive‑pin hole. If the radius is not within 0.060–0.090 inch the rotating ring assembly and drive pins must be removed and scrapped. Compliance is required before the next flight; the AD follows reports of interference between a new drive pin and the ring bore and refers to BHTC alert service bulletins."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific mechanical defect in specific helicopter models. It has not expanded beyond its original purpose of ensuring airworthiness of the rotating ring assembly."},"complexity_factors":["Multiple specific part numbers (P/N) and serial number ranges to cross-reference","Four different helicopter models with different Alert Service Bulletin references","Precise technical measurement requirement (0.060 to 0.090 inch radius)","Incorporation by reference to external technical documents (Alert Service Bulletins 222-01-90, 222U-01-61, and 230-01-23)","One explicit exemption (rotating ring assemblies with serial prefix \"TI XXX\")","Mandatory scrapping requirement with no repair option"],"plain_english_summary":"This CASA Airworthiness Directive orders owners/operators of specified Bell 222/222B/222U and 230 helicopters (and listed spare rotating rings) to inspect the drive-pin hole radius on the rotating ring assembly before the next flight. The radius must be 0.060–0.090 inches; assemblies or drive pins outside that tolerance must be removed and destroyed. The AD prevents dangerous interference between a redesigned drive pin and the ring bore that could cause in‑flight failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-222-28-rotating-ring-drive-pin-hole","history":"/api/acts/ad-bell-222-28-rotating-ring-drive-pin-hole/history","analysis":"/api/acts/ad-bell-222-28-rotating-ring-drive-pin-hole/analysis","conflicts":"/api/acts/ad-bell-222-28-rotating-ring-drive-pin-hole/conflicts","importantCases":"/api/acts/ad-bell-222-28-rotating-ring-drive-pin-hole/important-cases","documents":"/api/acts/ad-bell-222-28-rotating-ring-drive-pin-hole/documents"}}