{"id":"F2006L03612","name":"AD/UH-1/19 - Tail Rotor Slider","slug":"ad-uh-1-19-tail-rotor-slider","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":137293,"registerId":"commonwealth-F2006L03612-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bell UH-1 Series Helicopters","sectionType":"division","heading":"Bell UH-1 Series Helicopters","content":"### Bell UH-1 Series Helicopters\n\n| AD/UH-1/19 | Tail Rotor Slider | 12/2006 |\n| ---------- | ----------------- | ------- |\n\n| Applicability: | Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P helicopters, and Southwest Florida Model SW204, SW204HP, SW205, and SW205A-1 helicopters, with tail rotor (T/R) slider, part number (P/N)204-010-720-3 or P/N 204010720-3 installed. |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement: | 1. Review the helicopter records to determine the Commercial and Government Entity (CAGE) code of the T/R slider. If necessary, remove the installed T/R slider to determine the CAGE code.If the T/R slider is an FAA approved part; for example, an original equipment manufacturer (OEM) part, and has a legible CAGE code other than Code 15716 or 26098; no further action is required.2. If you cannot determine whether the T/R slider is an FAA approved part and it contains no stamped CAGE code, an illegible stamped CAGE code, or is stamped with a CAGE code 15716 or 26098 then do the following:a. Magnaflux inspect the T/R slider for a crack.b If a crack is found, replace the cracked T/R slider with an airworthy T/R slider.Note 1: T/R sliders manufactured by Forest Scientific, Inc., were produced under a military contract and do not meet the OEM specifications. The machining process resulted in excess surface roughness. See Figure 1 of this AD.Figure 1.Note 2: T/R sliders manufactured by Bell Helicopter Textron, Inc. (left) and Forest Scientific, Inc. (right). Note the rough finish of the Forest Scientific, Inc.-manufactured T/R slider compared to the one shown on the left.Note 3: T/R sliders manufactured by Bell Helicopter Textron, Inc. have a vibro-etched P/N on them and do not have a CAGE code marking on the part.3. Replace each T/R slider that has an illegible CAGE code or Code 15716 or 26098 with an FAA approved airworthy slider without a CAGE code or with a legible CAGE code other than 15716 or 26098. Any T/R slider removed from service based on the requirements of this paragraph is not eligible for installation on any helicopter.Terminating Action.Replacing the T/R slider with an FAA approved airworthy T/R slider without a CAGE code or with a legible CAGE code other than 15716 or 26098, constitutes terminating action for the requirements of this AD.Note 4: FAA AD 2006-19-05 Amdt 39-14762 dated 5 September 2006 refers. |\n| Compliance: | 1. Within 25 hours after the effective date of this AD.2. a. Before further flight, unless accomplished previously, and thereafter at intervals not to exceed 25 hours time in service (TIS).2. b. Before further flight.3. On or before accumulating 1000 hours TIS or on or before 12 months, whichever occurs first, after the effective date of this AD. |\n| | This Airworthiness Directive becomes effective on 23 November 2006. |\n| Background: | This AD is prompted by two accidents attributed to sub-standard T/R sliders that failed during flight. The actions specified by this AD are intended to prevent failure of a T/R slider, loss of T/R control, and subsequent loss of control of the helicopter. |\n\n![](image.002.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n12 October 2006","sortOrder":0},{"sectionNumber":"AD/UH-1/19","sectionType":"part","heading":"AD/UH-1/19","content":"## AD/UH-1/19","sortOrder":1},{"sectionNumber":"Tail Rotor Slider","sectionType":"part","heading":"Tail Rotor Slider","content":"## Tail Rotor Slider","sortOrder":2},{"sectionNumber":"12/2006","sectionType":"part","heading":"12/2006","content":"## 12/2006","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This AD maintains focused scope on tail rotor slider safety for specific UH-1 helicopter models. The original intent was to address defective parts from Forest Scientific, Inc., and the final version directly targets that specific safety risk without expanding to unrelated systems or aircraft types."},"complexity_factors":["Multiple conditional pathways (if/then logic) in the requirements section","Technical aviation terminology requiring domain knowledge (CAGE codes, Magnaflux, TIS/time in service)","Cross-reference to US FAA AD 2006-19-05 for additional context","Nested compliance deadlines with alternative triggers (hours vs. calendar time)","Visual reference to Figure 1 (not fully reproduced in text) for part identification","Specific part number variants with and without hyphens (P/N 204-010-720-3 vs P/N 204010720-3)"],"plain_english_summary":"This AD mandates inspection and replacement of certain tail rotor sliders on Bell UH‑1 and specified SW204/205 helicopters after defective Forest Scientific parts (CAGE 15716/26098 or unmarked) were linked to in‑flight failures and two crashes. Affected operators must verify part origin, magnetic particle‑inspect suspect sliders, remove cracked units before flight, and replace any remaining suspect sliders within 1,000 flight hours or 12 months to prevent loss of tail‑rotor control."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive targets a specific safety risk identified in the background (sub‑standard tail‑rotor sliders) and applies narrowly to listed helicopter models fitted with slider P/N 204‑010‑720‑3 and sliders with certain or illegible CAGE codes. It implements identification, inspection and replacement measures only; it does not expand to other components or broader airworthiness categories, so scope remains aligned with the stated safety purpose."},"complexity_factors":["Narrow applicability but multiple affected airframe models (several UH‑1 variants and SW204/SW205 series).","Identification rules depend on part number plus CAGE/manufacturer markings: legible, illegible, or specific CAGE codes (15716, 26098).","May require physical removal of the T/R slider to read markings, increasing labour and downtime.","Mandated non‑destructive test method (Magnaflux) for suspected parts and mandatory replacement if cracks found.","Staggered and differing compliance intervals (within 25 hours; before further flight; recurring 25‑hour inspections; or replacement within 1,000 TIS/12 months).","Removed parts declared ineligible for re‑installation and a defined terminating action once compliant parts are fitted.","Notes on manufacturing differences (Forest Scientific vs Bell) that affect identification and conformity assessments."],"plain_english_summary":"Requires operators of specified Bell UH‑1 and Southwest Florida UH‑1 series helicopters fitted with tail‑rotor slider P/N 204‑010‑720‑3 to check records and part markings, remove the slider if needed, perform a magnetic particle (Magnaflux) inspection where the CAGE/manufacturer code is missing, illegible, or stamped 15716/26098, and replace cracked or non‑conforming sliders. Compliance deadlines include immediate checks, inspections within 25 flight hours, and replacement within 1,000 TIS or 12 months. Operators bear inspection and replacement costs. Purpose: prevent slider failure and loss of tail‑rotor control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-uh-1-19-tail-rotor-slider","history":"/api/acts/ad-uh-1-19-tail-rotor-slider/history","analysis":"/api/acts/ad-uh-1-19-tail-rotor-slider/analysis","conflicts":"/api/acts/ad-uh-1-19-tail-rotor-slider/conflicts","importantCases":"/api/acts/ad-uh-1-19-tail-rotor-slider/important-cases","documents":"/api/acts/ad-uh-1-19-tail-rotor-slider/documents"}}