{"id":"F2014L00462","name":"AD/ELECT/74 Amdt 1 - Lermer GmbH Water Boilers","slug":"ad-elect-74-amdt-1-lermer-gmbh-water-boilers","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":91576,"registerId":"commonwealth-F2014L00462-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Electrical Equipment","sectionType":"division","heading":"Electrical Equipment","content":"### Electrical Equipment\n\n| AD/ELECT/74 AMDT 1 | Lermer GmbH Water Boilers | 9/2014 |\n| ------------------ | ------------------------- | ------ |\n\n```html\n

Applicability:

This AD applies to Lermer GmbH (previously Lermer) water boilers with any of the following:

(a) Part Number L13471, L13471-05, L13471-11 or L13471-19;

(b) Type Number 1010099-6, 1010099-10, 1010099-6.1 or 1010099-6.2.

However, this AD does not apply to water boilers that have been engraved with either:

(a) one of the following Airbus Service Bulletin (SB) numbers: A300-25A0474, A310-25A2146, A300-25A6170, A320-25A1299, A330-25A3174,
A340-25A4192; or

(b) the words ‘Complies with AD F-2004-132’.

Note 1: These water boilers are known to be installed on, but not limited to, Airbus A300, A310, A300-600, A318, A319, A320, A321, A330 and A340 series aeroplanes.

Requirement:

Get access to the water boiler in accordance with the applicable aircraft maintenance manual and identify the water boiler. If a water boiler bears one of the following Lermer Part Numbers or Type Numbers:

(a) Part Number L13471, L13471-05, L13471-11 or L13471-19;

(b) Type Number 1010099-6, 1010099-10, 1010099-6.1 or 1010099-6.2;

carry out the following:

(a) check the logo on the identification plate at the rear side of the water boiler (see fig 1). If the new DRIESSEN logo exists, no further action is required;

(b) if the old Lermer logo exists, inspect the overheat protection of the water boiler in accordance with Lermer GmbH CMM 25-30-31 page block 300;

\"\"

Fig 1 - Lermer Water Boiler

(c) if four or more electrical terminals are connected, engrave adjacent to the equipment label ‘Complies with AD F-2004-132’;

(d) if less than four electrical terminals are connected, scrap the water boiler and install an airworthy one.

For Airbus aeroplanes, embodiment of the following applicable SB is considered an acceptable mean of compliance for the requirements of this AD:

A300-25A0474
A310-25A2146

A300-25A6170
A320-25A1299

A330-25A3174
340-25A4192.

Note 2: Direction Générale de l’Aviation Civile of France (DGAC) AD F-2004-132 refers.

Compliance:

The action set out in the Requirement section must be taken before 31 December 2004.

The effective date of this AD is 5 May 2014.

Background:

DGAC advised that an A330 aircraft made an in-flight turn back due to overheat of a galley water boiler.

Investigations revealed that some of the Lermer water boilers listed above have a deficiency in the electrical circuit design. In fact, the overheat protector may be installed in serial with the relay control and in case of relay contact sticking, the continuous source of power to the heating element cannot be cut. This situation may lead to the emission of a burning smell together with smoke and possible injury to the aeroplane’s occupants.

In response to this situation, CASA issued AD/ELECT/74 dated 5 August 2004 to require the inspection of applicable water boilers. Water boilers with overheat protection having less than 4 electrical terminals are discarded; those with 4 or more electrical terminals are marked as having been inspected and returned to service.

CASA issued AD/ELECT/74 Amdt 1 to correct a typographical error in the DGAC AD number referenced in Note 2 of this AD. There are no changes to the technical requirements of the AD and the dates for compliance remain unchanged.

\n```\n\n![](image.002.png)\n\nMike Higgins \nDelegate of the Civil Aviation Safety Authority\n\n28 April 2014","sortOrder":0},{"sectionNumber":"AD/ELECT/74 AMDT 1","sectionType":"part","heading":"AD/ELECT/74 AMDT 1","content":"## AD/ELECT/74 AMDT 1","sortOrder":1},{"sectionNumber":"Lermer GmbH Water Boilers","sectionType":"part","heading":"Lermer GmbH Water Boilers","content":"## Lermer GmbH Water Boilers","sortOrder":2},{"sectionNumber":"9/2014","sectionType":"part","heading":"9/2014","content":"## 9/2014","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment (AD/ELECT/74 Amdt 1) only corrected a typographical error in the referenced DGAC AD number (Note 2). The technical requirements, applicability, and compliance dates of the original AD were unchanged. Therefore the scope and substance of the safety obligation were not expanded or otherwise altered by this amendment."},"complexity_factors":["Small, well-scoped instrument limited to a few specific part numbers (4 part numbers and 4 type numbers)","Simple conditional logic: logo check (DRIESSEN vs old Lermer) then two branches (inspection and marking vs scrap-and-replace) plus a numeric threshold (four electrical terminals)","Cross-references to a small number of external documents: Lermer GmbH CMM 25-30-31 (for inspection) and several Airbus Service Bulletins (acceptable means of compliance)","One minor amendment only (typographical correction of a referenced DGAC AD number) with no change to technical requirements","Clear single compliance deadline and an explicit effective date"],"plain_english_summary":"**What this instrument does (in plain English)**\n\n- This is an airworthiness directive (safety order) that applies to certain Lermer GmbH galley water boilers installed on Airbus aeroplanes. It identifies boilers by specific Lermer part numbers (L13471, L13471-05, L13471-11, L13471-19) and type numbers (1010099-6, 1010099-10, 1010099-6.1, 1010099-6.2). (See the \"Applicability\" section.)\n\n- Some boilers are exempt from this AD if they already bear one of a set of Airbus Service Bulletin (SB) numbers or the words \"Complies with AD F-2004-132\" engraved on the unit.\n\n- The required actions are mechanical and inspection tasks performed under an aircraft maintenance manual. In short (see the \"Requirement\" section):\n - Open access to the boiler and identify it.\n - If the boiler shows the new DRIESSEN logo on the identification plate, no further work is required.\n - If the boiler shows the old Lermer logo, inspect the overheat protection according to Lermer GmbH Component Maintenance Manual (CMM 25-30-31, block 300).\n - If the boiler has four or more electrical terminals connected, engrave next to the equipment label the words \"Complies with AD F-2004-132\".\n - If the boiler has fewer than four electrical terminals connected, the boiler must be scrapped and replaced with an airworthy unit.\n\n- For Airbus aircraft, installing the applicable Airbus Service Bulletins listed in the AD is accepted as an alternative way to comply.\n\n- The AD sets a compliance deadline (the AD records that the actions must have been done before 31 December 2004) and records its effective date (5 May 2014 for the amendment). The background explains why the action was ordered: a DGAC (France) report of a galley water boiler overheat on an A330; investigation found a design/installation issue that could allow continuous heating if a relay stuck, creating smoke/fire risk.\n\n**Who this affects**\n\n- Airlines, aircraft operators and maintenance organisations that operate or maintain Airbus types known to carry the affected Lermer water boilers (A300, A310, A300-600, A318, A319, A320, A321, A330, A340 series are mentioned as known installations). Those organisations must perform the inspections, marking or replacement required by the AD.\n\n- Parts suppliers, MRO (maintenance, repair and overhaul) providers and any party supplying replacement water boilers may be affected if scrapping and replacement are required.\n\n**Why it matters (claimed purpose and practical testing of that claim)**\n\n- The stated purpose (in the AD \"Background\") is to eliminate or reduce the risk that an overheat protector, if installed in series with a relay control and the relay sticks, will not cut power to the heating element — a failure mode that can produce burning smell, smoke and possible injury to occupants.\n\n- Practical effects and trade-offs:\n - Who pays: the aircraft operator bears inspection labour costs, marking/engraving costs, and replacement costs when scrapping is required. These costs include aircraft downtime and sourcing replacement boilers that meet airworthiness standards.\n - Who decides: the regulator (CASA) mandates the requirement; acceptable means of compliance are stated (the specific Airbus SBs or the Lermer CMM). Maintenance organisations perform the mechanical checks and decide, on each unit, whether to mark or scrap based on the number of terminals and logo.\n - Behaviour changes required: maintenance personnel must include this inspection in their work scope, identify logos/part numbers, carry out the specified inspection per Lermer CMM, make an engraving if required, or remove and replace boilers with fewer than four terminals.\n - Costs vs benefit: the directive imposes immediate inspection and possible replacement costs to reduce a low-frequency but safety-significant failure mode (overheat/smoke). The AD reduces the probability of the identified hazardous outcome by removing or marking non-compliant units and ensuring the overheat protection is correctly installed.\n - Implementation risks: misidentification of part or logo could lead to unnecessary scrapping or missed hazards; engraving as a compliance marking relies on accurate inspection records; replacing scrapped boilers requires availability of conforming replacement units and scheduled downtime.\n - Compliance burden and discretion: CASA prescribes the inspection and acceptable SBs; maintenance organisations must follow the Lermer CMM or the listed SBs. The amendment notes it corrected a typographical error in a referenced DGAC AD number only — it did not change the technical obligations.\n\n**Other operational notes**\n\n- The AD explicitly accepts several Airbus Service Bulletins as an \"acceptable means of compliance\", which lets operators comply by following those SBs instead of performing the AD steps directly (useful if those SBs incorporate corrective modification or instructions).\n\n- The AD distinguishes units by visible logo (new DRIESSEN vs old Lermer): if the logo is the new DRIESSEN logo, the unit is considered already compliant.\n\n- The amendment (Amdt 1) to the original AD corrected a typographical error in the referenced DGAC AD number and did not change technical requirements or compliance deadlines.\n\n(References: Applicability, Requirement, Compliance, and Background sections of the AD.)"},"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 Amendment 1 to an existing AD. The amendment explicitly states it only corrects a typographical error in the referenced French DGAC AD number. The technical requirements, applicability, and compliance dates remain identical to the original 2004 directive. No scope expansion has occurred."},"complexity_factors":["Multiple nested conditions: applicability depends on part/type numbers, then logo type, then terminal count","Cross-reference to external technical documents (Lermer GmbH CMM 25-30-31, Airbus Service Bulletins, French DGAC AD F-2004-132)","Exception to the exception structure: applies to certain part numbers, except those already modified per specific SBs or engraving","Technical aviation terminology requiring domain knowledge (CMM, SB, AD, airworthy, relay contact sticking)","Dual compliance paths: direct inspection/engraving OR embodiment of Airbus SBs as acceptable means of compliance"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection or replacement of certain Lermer water boilers on Airbus A300–A340 family aircraft because a stuck relay can defeat overheat protection, risking smoke, fire, and injury. Operators must verify identification markings and either inspect/engrave compliant units or scrap and replace noncompliant ones.\n\nThe 2014 amendment only corrects a French authority reference number typo; it does not change required actions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-elect-74-amdt-1-lermer-gmbh-water-boilers","history":"/api/acts/ad-elect-74-amdt-1-lermer-gmbh-water-boilers/history","analysis":"/api/acts/ad-elect-74-amdt-1-lermer-gmbh-water-boilers/analysis","conflicts":"/api/acts/ad-elect-74-amdt-1-lermer-gmbh-water-boilers/conflicts","importantCases":"/api/acts/ad-elect-74-amdt-1-lermer-gmbh-water-boilers/important-cases","documents":"/api/acts/ad-elect-74-amdt-1-lermer-gmbh-water-boilers/documents"}}