{"id":"F2007L00865","name":"AD/OXY/20 Amdt 2 - Oxygen Cylinders","slug":"ad-oxy-20-amdt-2-oxygen-cylinders","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":64644,"registerId":"commonwealth-F2007L00865-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Oxygen Systems","sectionType":"division","heading":"Oxygen Systems","content":"### Oxygen Systems\n\n| AD/OXY/20 Amdt 2 | Oxygen Cylinders | 5/2007 DM |\n| ---------------- | ---------------- | --------- |\n\n```html\n

Applicability:

Intertechnique , Zodiac Aircraft Systems, oxygen reserve cylinders having part number (P/N) GLF(XXX)-(X), GLD(XXX)-(X), PC2300 and SLF300, which are known to be installed on, but not limited to the following aircraft:

Airbus
Dassault Aviation



Pilatus
Eurocopter

Hindustan Aeronautics Ltd

A300 series
Mystère-Falcon 20
Mystère-Falcon 50
Falcon 200
Falcon 900
all models
SA 315 B
AS 350 B3
all models

Requirement:

1. Unless previously accomplished in accordance with AD/ECUREUIL/121, AD/SA 315/1, AD/OXY/20 or AD/OXY/20 Amdt 1:

a. Identify the year of manufacture of each affected P/N oxygen reserve cylinders made of Aluminium Alloy 5283 (AA5283) fitted to aircraft.

b. Remove and empty the oxygen cylinder/s from the aircraft in accordance with Intertechnique Service Bulletin (SB) GLD/GLF-35-150 dated 20 September 2006.

2. For oxygen reserve cylinders held as spares, unless previously accomplished in accordance with AD/ECUREUIL/121, AD/SA 315/1, AD/OXY/20 or AD/OXY/20 Amdt 1, identify the year of manufacture of each affected P/N oxygen reserve cylinder made of AA5283 and empty all oxygen reserve cylinders that have reached or exceeded 25 years after manufacture, in accordance with
SB GLD/GLF-35-150.

3. Oxygen reserve cylinders with P/Ns as affected by this Amendment may not be installed in any aircraft as replacement part, except within the time in service (TIS) or time since manufacture limits as specified in this Amendment.

Note 1: EASA AD 2006-0286R1 refers.

\n```\n\n| Compliance: | For Requirement 1.a - Before the next flight after the effective date of this Amendment.For Requirement 1.b. -Aircraft operated in salt-laden atmospheric conditions - Upon accumulating 15 years TIS (since manufacture and installation on aircraft), or within 15 days after the effective date of this Amendment if 15 years TIS has already been reached.orAircraft operated in normal climatic conditions - Upon accumulating 25 years TIS (since manufacture and installation on helicopters), or within 12 months after the effective date of this Amendment if 25 years TIS has already been reached.orIf the TIS cannot positively be established, within 15 days after the effective date of this Amendment.For Requirement 2 - Within seven days after the effective date of this Amendment.For Requirement 3 - As of effective date of this Amendment. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | Note 2: EASA EAD 2006-0286-E cancelled and superseded EASA EAD2006-0261-E. AD/ECUREUIL/121 and AD/SA 315/1, which were based on EASA EAD 2006-0261-E, have also been cancelled. |\n| | This Amendment becomes effective on 10 April 2007. |\n| Background: | The original issue of this Directive was issued following information concerning the risk of high-pressure oxygen cylinder rupturing causing rapid venting of the contents. These cylinders are used for missions at high altitudes or to ensure respiratory aid for passengers feeling sick.It has been demonstrated that the material characteristics of the Aluminium Alloy 5283 from which the cylinders are manufactured deteriorate in the course of time and may possibly lead these oxygen cylinders to tear and abruptly vent onboard an aircraft. |\n| | Amendment 1 of this Directive was issued to correct a typographical error. |\n\n| | This Amendment primarily extends the compliance by six months for aircraft operated in normal climatic conditions and having already accumulated 25 years TIS, as of the effective date of this Amendment. The Amendment also allows seven days after the effective date to identify and, if necessary, empty spare cylinder, it also introduces some minor formatting changes. |\n| --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | Amendment 1 of this Directive became effective on 29 September 2006. |\n| | The original issue of this Directive became effective on 26 September 2006. |\n\n![](image.001.png) \nCharles Lenarcic \nDelegate of the Civil Aviation Safety Authority\n\n28 March 2007","sortOrder":0},{"sectionNumber":"AD/OXY/20 Amdt 2","sectionType":"part","heading":"AD/OXY/20 Amdt 2","content":"## AD/OXY/20 Amdt 2","sortOrder":1},{"sectionNumber":"Oxygen Cylinders","sectionType":"part","heading":"Oxygen Cylinders","content":"## Oxygen Cylinders","sortOrder":2},{"sectionNumber":"5/2007 DM","sectionType":"part","heading":"5/2007 DM","content":"## 5/2007 DM","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"This Amendment modestly changed scope by extending the compliance window by six months for aircraft in normal climatic conditions that had already reached 25 years TIS, and by allowing seven days after the effective date to identify and, if necessary, empty spare cylinders (summary paragraph and Compliance table). It also formalises that affected cylinders must not be installed as replacements beyond the TIS/manufacture limits (Requirement 3) and records the cancellation/supersession of prior EASA EADs/ADs that formerly governed compliance (Note 2)."},"complexity_factors":["Multiple affected part numbers and many aircraft types listed in Applicability (P/N GLF(XXX)-(X), GLD(XXX)-(X), PC2300, SLF300; various Airbus, Dassault, Pilatus, Eurocopter, Hindustan models).","Different obligations for installed cylinders vs spares (Requirement 1 applies to installed; Requirement 2 to spares).","Cross‑reference to and reliance on an external Service Bulletin for removal/emptying procedure (Intertechnique SB GLD/GLF‑35‑150 dated 20 Sept 2006) (Requirement 1.b, Requirement 2).","Variable compliance deadlines driven by climatic conditions and time‑in‑service: immediate (before next flight) for some checks, 15 days, 7 days, 12 months or upon accumulating 15/25 years TIS depending on salt‑laden vs normal conditions (Compliance table entries for Requirements 1.a, 1.b, 2, 3).","Negative inference rule: cylinders may not be installed as replacement parts except within the TIS/manufacture limits specified (Requirement 3) — creates ongoing procurement and inventory constraints for operators and suppliers.","Requirement to identify year of manufacture where TIS may be unknown and a short fallback compliance period if TIS cannot be established (Compliance table: 'If the TIS cannot positively be established, within 15 days').","Administrative churn from supersessions and cancellations of prior EASA/EAD/ADs (Note 2 and Note 1 references to EASA AD 2006‑0286R1 and cancellation of EAD2006‑0261‑E) which affects which prior actions satisfy compliance.","Short compliance windows for some steps (e.g. Requirement 2 within seven days) increasing near‑term operational and logistic burden on operators and spares managers."],"plain_english_summary":"This amendment requires operators and maintainers to identify the manufacture year of certain Intertechnique oxygen reserve cylinders made of Aluminium Alloy 5283, to remove and empty those that meet age limits, and prohibits installing affected part numbers beyond specified time‑in‑service or manufacture limits. It applies to operators, maintenance organisations and parts holders (installed and spares) and uses different compliance deadlines depending on climatic exposure and whether time‑in‑service can be established. The stated purpose is to reduce the risk of age‑related cylinder rupture."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This Amendment 2 remains tightly focused on its original purpose: addressing the safety risk of aging Aluminium Alloy 5283 oxygen cylinders. The amendments are minor procedural adjustments — extending one compliance deadline by six months, adding a 7-day window for spare cylinder identification, and correcting formatting. The scope has not expanded beyond the original safety concern."},"complexity_factors":["Multiple compliance deadlines based on operating environment (salt-laden vs normal climatic conditions)","Cross-references to four previous airworthiness directives (AD/ECUREUIL/121, AD/SA 315/1, AD/OXY/20, AD/OXY/20 Amdt 1) for exemption purposes","Conditional logic: different time-in-service (TIS) thresholds apply depending on whether TIS can be established","Nested applicability: applies to specific part numbers on specific aircraft models, with 'not limited to' language creating potential uncertainty","Dual treatment of installed vs spare cylinders with different compliance timeframes","Reference to external technical document (Intertechnique Service Bulletin GLD/GLF-35-150) for procedural requirements","Amendment structure requires reading background notes to understand evolution from original directive"],"plain_english_summary":"This CASA Airworthiness Directive requires retirement and grounding of specific Intertechnique/Zodiac oxygen cylinders (Aluminium 5283) used on several Airbus, Dassault, Pilatus and Eurocopter types because the alloy can degrade and cause sudden high‑pressure ruptures. \n\nOwners, operators and maintenance organisations must identify cylinder manufacture dates, remove/empty aged in‑service and spare cylinders (15‑year limit in salt‑air operations; 25 years otherwise) and stop fitting out‑of‑limit spares to prevent fire/explosion risk."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-oxy-20-amdt-2-oxygen-cylinders","history":"/api/acts/ad-oxy-20-amdt-2-oxygen-cylinders/history","analysis":"/api/acts/ad-oxy-20-amdt-2-oxygen-cylinders/analysis","conflicts":"/api/acts/ad-oxy-20-amdt-2-oxygen-cylinders/conflicts","importantCases":"/api/acts/ad-oxy-20-amdt-2-oxygen-cylinders/important-cases","documents":"/api/acts/ad-oxy-20-amdt-2-oxygen-cylinders/documents"}}